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Organochlorine Pesticide Mix C #1 (6 components)

...Organochlorine Pesticide Mix C #1...

Organochlorine Pesticide System Evaluation Mix (2 components)

...Organochlorine Pesticide System Evaluation Mix...

Organochlorine Pesticide Mix #2 (Rev), Method 525.2 (8 components)

...Organochlorine Pesticide Mix #2 (Rev), Method 525.2...

Organochlorine Pesticide Mix AB #1 (20 components)

...Organochlorine Pesticide Mix AB #1...

Organochlorine Pesticide Mix AB #2 (20 components)

...Organochlorine Pesticide Mix AB #2...

Organochlorine Pesticide Mix AB # 3 (20 components)

...Organochlorine Pesticide Mix AB # 3...

Organochlorine Pesticide Resolution Check Mix (with surrogates) (22 components)

...Organochlorine Pesticide Resolution Check Mix (with surrogates)...

Raw Polyurethane Foam (PUF) Plugs

....Method ApplicationsEPA TO-10A—Organochlorine and organophosphorus pesticides, carbamate, pyrethrin )—cat.# 22114, 22954EPA IP-8—Organochlorine and organophosphorus pesticides, carbamate, pyrethrin, triazine...

Stx-CLPesticides Columns (fused silica with Siltek deactivation)

proprietary Crossbond phase

...Many laboratories analyzing organochlorine pesticides struggle with breakdown and adsorption pesticides. ... Application-specific columns for organochlorine pesticides and herbicides...

Stx-CLPesticides2 Columns (fused silica with Siltek deactivation)

proprietary Crossbond phase

...Many laboratories analyzing organochlorine pesticides struggle with breakdown and adsorption pesticides. ... Application-specific columns for organochlorine pesticides and herbicides...

Stx-CLPesticides Column Kit, 0.25mm ID

proprietary Crossbond phases

...Many laboratories analyzing organochlorine pesticides struggle with breakdown and adsorption pesticides. ... Application-specific columns for organochlorine pesticides and herbicides...

Stx-CLPesticides Column Kit

proprietary Crossbond phases

...Many laboratories analyzing organochlorine pesticides struggle with breakdown and adsorption pesticides. ... Application-specific columns for organochlorine pesticides and herbicides...

Cleaned Polyurethane Foam (PUF) Cartridges

...Method ApplicationsEPA TO-10A—Organochlorine and organophosphorus pesticides, carbamate (PAHs)—cat.# 22114, 22954EPA IP-8—Organochlorine and organophosphorus pesticides, carbamate ... Use for collection of semivolatiles (pesticides, PCBs, PAHs).Both large high...

Resprep CarboPrep Plus SPE Cartridges

...Keep your organochlorine pesticide GCs up and running by protecting them against matrix , degrading pesticides and interrupting work due to failed calibration checks. For CarboPrep Plus cartridges ... Designed specifically for the cleanup of sample extracts for organochlorine pesticides...

EPA Method 525.3 PAH IS Mix (3 components)

... Full 525.3 product suite features organochlorine pesticide (OCP), organophosphorus pesticide (OPP...

EPA Method 525.3 PCP IS

... Full 525.3 product suite features organochlorine pesticide (OCP), organophosphorus pesticide (OPP...

EPA Method 525.3 Surrogate Standard (3 components)

... Full 525.3 product suite features organochlorine pesticide (OCP), organophosphorus pesticide (OPP...

Rtx-35 Columns (fused silica)

midpolarity phase; Crossbond diphenyl dimethyl polysiloxane

...An Rtx-35 column is a popular confirmation column for pesticides and herbicides in conjunction ... General-purpose columns for organochlorine pesticides, PCB congeners (e.g., Aroclor...

MXT-35 Columns (Siltek-treated stainless steel)

midpolarity phase; Crossbond diphenyl dimethyl polysiloxane

...General-purpose columns for organochlorine pesticides, PCB congeners (e.g. Aroclor...

MXT-200 Columns (Siltek-treated stainless steel)

midpolarity phase; Crossbond trifluoropropylmethyl polysiloxane

..., and glycols. Excellent confirmation column with an Rtx-5 column, for phenols, nitrosamines, organochlorine pesticides, chlorinated hydrocarbons, and chlorophenoxy herbicides.Equivalent to USP G6 phase...

Universal Press-Tight Connectors

....Optional Siltek deactivation is ideal for organochlorine pesticides analysis....

Universal Angled "Y" Press-Tight Connectors

....Optional Siltek deactivation is ideal for organochlorine pesticides analysis....

Universal "Y" Press-Tight Connectors

....Optional Siltek deactivation is ideal for organochlorine pesticides analysis....

EPA Method 525.3 OCP Cal Standard (29 components)

... Full 525.3 product suite features organochlorine pesticide (OCP ), organophosphorus pesticide (OPP), organonitrogen pesticide (ONP...

EPA Method 525.3 OPP Cal Standard (16 components)

... Full 525.3 product suite features organochlorine pesticide (OCP), organophosphorus pesticide (OPP), organonitrogen...

EPA Method 525.3 PAH Cal Standard (20 components)

... Full 525.3 product suite features organochlorine pesticide (OCP), organophosphorus pesticide (OPP...

EPA Method 525.3 PCB Cal Standard (14 components)

... Full 525.3 product suite features organochlorine pesticide (OCP), organophosphorus pesticide (OPP...

Rtx-CLPesticides Column Kit, 0.25 mm ID

proprietary Crossbond phases

... analyses, compared to 1701 or phenyl phases, make these the pesticide columns of choice. Rtx in chlorinated pesticide analyses for EPA Methods 8081, 608, and CLP. By achieving baseline resolution of the 20 ... Application-specific columns for organochlorine pesticides and herbicides.Low...

Rtx-200MS—Low-Bleed GC-MS Columns (fused silica)

midpolarity phase; Crossbond trifluoropropylmethyl polysiloxane

..., glycols. Excellent confirmation column with an Rtx-5 column for phenols, nitrosamines, organochlorine pesticides, chlorinated hydrocarbons, and chlorophenoxy herbicides.Equivalent to USP G6 phase....

Rtx-200 Columns (fused silica)

midpolarity phase; Crossbond trifluoropropylmethyl polysiloxane

..., organochlorine pesticides, chlorinated hydrocarbons, and chlorophenoxy herbicides.Equivalent to USP G6...

EPA Method 525.3 ONP Cal Standard (44 components)

... Full 525.3 product suite features organochlorine pesticide (OCP), organophosphorus pesticide (OPP), organonitrogen...

Rxi-5Sil MS Columns (fused silica)

low-polarity phase; Crossbond 1,4-bis(dimethylsiloxy)phenylene dimethyl polysiloxane

... compounds, chlorinated hydrocarbons, phthalates, phenols, amines, organochlorine pesticides , organophosphorus pesticides, drugs, solvent impurities, and hydrocarbons. Temperature range: -60 °C to 350...

Rtx-CLPesticides Columns (fused silica)

proprietary Crossbond phase

... these the pesticide columns of choice. Rtx-CLPesticides columns are specially designed to overcome the coelutions and analyte breakdown typically encountered in chlorinated pesticide analyses for EPA Methods 8081, 608 ... Application-specific columns for organochlorine pesticides and herbicides.Low...

Rtx-CLPesticides2 Columns (fused silica)

proprietary Crossbond phase

... these the pesticide columns of choice. Rtx-CLPesticides columns are specially designed to overcome the coelutions and analyte breakdown typically encountered in chlorinated pesticide analyses for EPA Methods 8081, 608 ... Application-specific columns for organochlorine pesticides and herbicides.Low...

Rtx-CLPesticides Column Kit, 0.53 mm ID

proprietary Crossbond phases

... analyses, compared to 1701 or phenyl phases, make these the pesticide columns of choice. Rtx in chlorinated pesticide analyses for EPA Methods 8081, 608, and CLP. By achieving baseline resolution of the 20 ... Application-specific columns for organochlorine pesticides and herbicides.Low...

Rtx-CLPesticides Column Kit, 0.32 mm ID

proprietary Crossbond phases

... analyses, compared to 1701 or phenyl phases, make these the pesticide columns of choice. Rtx in chlorinated pesticide analyses for EPA Methods 8081, 608, and CLP. By achieving baseline resolution of the 20 ... Application-specific columns for organochlorine pesticides and herbicides.Low...

QuEChERS Performance Standard A (16 components)

... of commonly used organochlorine, organonitrogen, organophosphorus, and carbamate pesticides, while still ... Designed for use in all QuEChERS methods for pesticides in fruits and vegetables...

QuEChERS Performance Standards Kit

... Designed for use in all QuEChERS methods for pesticides in fruits and vegetables , including the original unbuffered method, AOAC 2007.01, and EN 15662. Kit contains organochlorine...

GC Multiresidue Pesticide Kit

...-03-8)Cat.# 32564: GC Multiresidue Pesticide Standard #2 (40 components)Organochlorine Cat.# 32563: GC Multiresidue Pesticide Standard #1 (16 components ... GC Multiresidue Pesticide Kit ... pesticide method is offered free of charge; downloadable for world-class GC-MS/MS multiresidue pesticide analysis: reference and internal ... Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables...

LC Multiresidue Pesticide Kit

...Cat.# 31972: LC Multiresidue Pesticide Standard #1 (13 components (Vamidoate) (2275-23-2)Cat.# 31973: LC Multiresidue Pesticide Standard #2 (16 components ... LC Multiresidue Pesticide Kit ... to confirm composition; detailed support documentation provided.Optimized multiresidue pesticide -MS/MS multiresidue pesticide analysis: reference and internal standards, Ultra and Pinnacle DB LC columns, Q ... Accurately detect and quantify pesticides of global food safety concern in a wide of interest, covering many LC-determined pesticides listed by government agencies; individual ampuls also sold...

Oregon Pesticide Standards (6 separate mixes)

...Each ampul sold separately.Cat.# 32586: Oregon Pesticide Standard #1 (6 .# 32587: Oregon Pesticide Standard #2 (14 components)Acetamiprid (135410 ... Oregon Cannabis Pesticide Standards meet the specific cannabis pesticide residue analysis needs of Oregon – and states with similar pesticide residue regulations/programs. Dissolved in acetonitrile ... Oregon Pesticide Standards ... Meet specific cannabis pesticide residue analysis needs of Oregon – and states with similar pesticide residue regulations/programs. Verified composition and stability. 59...

California Pesticide Standards (6 separate mixes)

...Each ampul sold separately.Cat.# 34124: California Pesticide Standard #1 -76-5)Phosmet (732-11-6)Cat.# 34125: California Pesticide Standard #2 (11 components ... California Pesticide Standards ... of Cannabis Control for regulated category I and II residual pesticide reporting—and of states with similar...

505 Organohalide Pesticide Mix (16 components)

...505 Organohalide Pesticide Mix...

TCLP Pesticide Mix (5 components)

...TCLP Pesticide Mix...

Pesticide Surrogate Mix (2 components)

...Pesticide Surrogate Mix...

Pesticide Surrogate Mix (2 components)

...Pesticide Surrogate Mix...

Pesticide Performance Evaluation Mix (6 components)

...Pesticide Performance Evaluation Mix...

Pesticide Matrix Spike Mix (6 components)

...Pesticide Matrix Spike Mix...

Pesticide Standard Mix A (9 components)

...Pesticide Standard Mix A...

Pesticide Standard Mix B (11 components)

...Pesticide Standard Mix B...

Phenylurea Pesticide Mixture (8 components)

...Phenylurea Pesticide Mixture...

GC Multiresidue Pesticide Standard #1 (16 components)

Organophosphorus Compounds

...Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables support documentation provided.Optimized multiresidue pesticide method is offered free of charge ... GC Multiresidue Pesticide Standard #1 ... Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables of 9 in the GC-MS/MS Multiresidue Pesticide Standard Kit. Other...

GC Multiresidue Pesticide Standard #2 (40 components)

Organochlorine Compounds

...Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables support documentation provided.Optimized multiresidue pesticide method is offered free of charge ... GC Multiresidue Pesticide Standard #2 ... Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables of 9 in the GC-MS/MS Multiresidue Pesticide Standard Kit. Other...

GC Multiresidue Pesticide Standard #3 (25 components)

Organonitrogen Compounds

...Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables support documentation provided.Optimized multiresidue pesticide method is offered free of charge ... GC Multiresidue Pesticide Standard #3 ... Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables of 9 in the GC-MS/MS Multiresidue Pesticide Standard Kit. Other...

GC Multiresidue Pesticide Standard #4 (28 components)

Organonitrogen Compounds

...Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables support documentation provided.Optimized multiresidue pesticide method is offered free of charge ... GC Multiresidue Pesticide Standard #4 ... Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables of 9 in the GC-MS/MS Multiresidue Pesticide Standard Kit. Other...

GC Multiresidue Pesticide Standard #5 (34 components)

Organonitrogen Compounds

...Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables support documentation provided.Optimized multiresidue pesticide method is offered free of charge ... GC Multiresidue Pesticide Standard #5 ... Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables of 9 in the GC-MS/MS Multiresidue Pesticide Standard Kit. Other...

GC Multiresidue Pesticide Standard #6 (18 components)

Synthetic Pyrethroid Compounds

...Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables support documentation provided.Optimized multiresidue pesticide method is offered free of charge ... GC Multiresidue Pesticide Standard #6 ... Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables of 9 in the GC-MS/MS Multiresidue Pesticide Standard Kit. Other...

GC Multiresidue Pesticide Standard #7 (10 components)

Herbicide Methyl Esters

...Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables support documentation provided.Optimized multiresidue pesticide method is offered free of charge ... GC Multiresidue Pesticide Standard #7 ... Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables of 9 in the GC-MS/MS Multiresidue Pesticide Standard Kit. Other...

GC Multiresidue Pesticide Standard #8 (24 components)

Organophosphorus Compounds

...Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables support documentation provided.Optimized multiresidue pesticide method is offered free of charge ... GC Multiresidue Pesticide Standard #8 ... Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables of 9 in the GC-MS/MS Multiresidue Pesticide Standard Kit. Other...

GC Multiresidue Pesticide Standard #9 (8 components)

Organophosphorus Compounds

...Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables support documentation provided.Optimized multiresidue pesticide method is offered free of charge ... GC Multiresidue Pesticide Standard #9 ... Accurately identify and quantify pesticide residues by GC-MS/MS in fruits, vegetables of 9 in the GC-MS/MS Multiresidue Pesticide Standard Kit. Other...

LC Multiresidue Pesticide Standard #1 (13 components)

Organophosphorus Compounds

...Accurately detect and quantify pesticides of global food safety concern in a wide range composition; detailed support documentation provided.Optimized multiresidue pesticide method ... LC Multiresidue Pesticide Standard #1 ... Accurately detect and quantify pesticides of global food safety concern in a wide range in the LC-MS/MS Multiresidue Pesticide Standard Kit. Other ampuls also sold...

LC Multiresidue Pesticide Standard #2 (16 components)

Carbamate/Uron Compounds

...Accurately detect and quantify pesticides of global food safety concern in a wide range composition; detailed support documentation provided.Optimized multiresidue pesticide method ... LC Multiresidue Pesticide Standard #2 ... Accurately detect and quantify pesticides of global food safety concern in a wide range in the LC-MS/MS Multiresidue Pesticide Standard Kit. Other ampuls also sold...

LC Multiresidue Pesticide Standard #3 (38 components)

Carbamate/Uron Compounds

...Accurately detect and quantify pesticides of global food safety concern in a wide range composition; detailed support documentation provided.Optimized multiresidue pesticide method ... LC Multiresidue Pesticide Standard #3 ... Accurately detect and quantify pesticides of global food safety concern in a wide range in the LC-MS/MS Multiresidue Pesticide Standard Kit. Other ampuls also sold...

LC Multiresidue Pesticide Standard #4 (63 components)

Organonitrogen Compounds

...Accurately detect and quantify pesticides of global food safety concern in a wide range composition; detailed support documentation provided.Optimized multiresidue pesticide method ... LC Multiresidue Pesticide Standard #4 ... Accurately detect and quantify pesticides of global food safety concern in a wide range in the LC-MS/MS Multiresidue Pesticide Standard Kit. Other ampuls also sold...

LC Multiresidue Pesticide Standard #5 (30 components)

Organonitrogen Compounds

...Accurately detect and quantify pesticides of global food safety concern in a wide range composition; detailed support documentation provided.Optimized multiresidue pesticide method ... LC Multiresidue Pesticide Standard #5 ... Accurately detect and quantify pesticides of global food safety concern in a wide range in the LC-MS/MS Multiresidue Pesticide Standard Kit. Other ampuls also sold...

LC Multiresidue Pesticide Standard #6 (28 components)

Organonitrogen Compounds

...Accurately detect and quantify pesticides of global food safety concern in a wide range composition; detailed support documentation provided.Optimized multiresidue pesticide method ... LC Multiresidue Pesticide Standard #6 ... Accurately detect and quantify pesticides of global food safety concern in a wide range in the LC-MS/MS Multiresidue Pesticide Standard Kit. Other ampuls also sold...

LC Multiresidue Pesticide Standard #7 (7 components)

Organonitrogen Compounds

...Accurately detect and quantify pesticides of global food safety concern in a wide range composition; detailed support documentation provided.Optimized multiresidue pesticide method ... LC Multiresidue Pesticide Standard #7 ... Accurately detect and quantify pesticides of global food safety concern in a wide range in the LC-MS/MS Multiresidue Pesticide Standard Kit. Other ampuls also sold...

LC Multiresidue Pesticide Standard #9 (7 components)

Carbamate/Uron Compounds

...Accurately detect and quantify pesticides of global food safety concern in a wide range composition; detailed support documentation provided.Optimized multiresidue pesticide method ... LC Multiresidue Pesticide Standard #9 ... Accurately detect and quantify pesticides of global food safety concern in a wide range in the LC-MS/MS Multiresidue Pesticide Standard Kit. Other ampuls also sold...

LC Multiresidue Pesticide Standard #8 (Hydramethylnon)

Organonitrogen Compounds

...Accurately detect and quantify pesticides of global food safety concern in a wide range composition; detailed support documentation provided.Optimized multiresidue pesticide method ... LC Multiresidue Pesticide Standard #8 ... Accurately detect and quantify pesticides of global food safety concern in a wide range in the LC-MS/MS Multiresidue Pesticide Standard Kit. Other ampuls also sold...

LC Multiresidue Pesticide Standard #10 (Carbendazim)

Carbamate/Uron Compounds

...Accurately detect and quantify pesticides of global food safety concern in a wide range composition; detailed support documentation provided.Optimized multiresidue pesticide method ... LC Multiresidue Pesticide Standard #10 ... Accurately detect and quantify pesticides of global food safety concern in a wide range in the LC-MS/MS Multiresidue Pesticide Standard Kit. Other ampuls also sold...

Pesticide Residue Cleanup SPE Cartridges

...Pesticide Residue Cleanup SPE Cartridges ... in multiresidue pesticide analysis to remove matrix interferences.Excellent for cleanup of dietary...

508.1 Pesticide Kit

...508.1 Pesticide Kit...

Pesticides Mix #2, Method 527 (5 components)

...Pesticides Mix #2, Method 527...

Organophosphorus Pesticide Mix, European Formulation (16 components)

...Organophosphorus Pesticide Mix, European Formulation...

Minnesota Ag List 1 Pesticide Kit

...32406: Minnesota Ag List 1 Pesticides Mix AAcetochlor (34256 -34-9)Trifluralin (1582-09-8)32407: Minnesota Ag List 1 Pesticides Mix B ... Minnesota Ag List 1 Pesticide Kit ... Contains 1 mL each of these mixtures.32406: Minnesota Ag List Pesticides Mix A32407 : Minnesota Ag List Pesticides Mix B...

Labeled Pesticide Residue Internal Standards for Food Analysis

...Labeled Pesticide Residue Internal Standards for Food Analysis ... Isotopically labeled to provide the best approach for pesticide residue quantification : pesticide reference standard mixes and internal/surrogate standards, GC and LC columns, QuEChERS, and more!...

Minnesota Ag List 1 Pesticides Mix A (16 components)

...*Added to Minnesota Department of Agriculture List 1 pesticide (neutrals) incident investigation trade names.[1] Analytical Lists for Pesticide Incident Investigations, Minnesota Department ... Minnesota Ag List 1 Pesticides Mix A...

531.2 Carbamate Pesticide Calibration Mixture (11 components)

... to the analyte list in 2003. Our 531.2 Carbamate Pesticides Calibration Mixture includes 1-naphthol ... 531.2 Carbamate Pesticide Calibration Mixture...

8140/8141 OP Pesticide Calibration Mix A (20 components)

..., pH, heat, and water. Restek has overcome these issues through our ongoing research into OP pesticide ... 8140/8141 OP Pesticide Calibration Mix A...

8141 OP Pesticide Calibration Mix B (7 components)

..., pH, heat, and water. Restek has overcome these issues through our ongoing research into OP pesticide ... 8141 OP Pesticide Calibration Mix B...

531.1 Carbamate Pesticide Calibration Mixture (10 components)

...531.1 Carbamate Pesticide Calibration Mixture...

Organophosphorus Pesticide Mix, 8270/Appendix IX (9 components)

...Organophosphorus Pesticide Mix, 8270/Appendix IX...

Pesticide Surrogate Mix, EPA 8080, 8081 (2 components)

...Pesticide Surrogate Mix, EPA 8080, 8081...

Pesticide Performance Evaluation Mix w/Surrogates (8 components)

...Pesticide Performance Evaluation Mix w/Surrogates...

Pesticide Standard Mix A w/Surrogates (11 components)

...Pesticide Standard Mix A w/Surrogates...

Pesticide Standard Mix B w/Surrogates (13 components)

...Pesticide Standard Mix B w/Surrogates...

L/C Pesticide Lab Control Sample (7 components)

...L/C Pesticide Lab Control Sample...

Resources

Rtx-CLPesticides and Rtx-CLPesticides2 Columns Instruction Sheet (PDF)

... selectivities for the separation of organochlorine pesticides, these columns help you achieve faster run times .S. EPA and other method criteria for organochlorine pesticides. Continue reading for instructions...

Helium, Hydrogen, or Nitrogen—The Choice is Yours: Unique Rtx-CLPesticides Column Set Provides Optimal Results for Organochlorine Pesticides GC-Micro-ECD Analysis Using Any Carrier Gas (PDF)

... Optimal Results for Organochlorine Pesticides GC-Micro-ECD Analysis Using Any Carrier Gas By Jason Thomas is adequate. For heavily used methods that employ helium, such as organochlorine pesticides analysis following...

Resprep

Resprep solid phase extraction (SPE) tubes are manufactured with specially cleaned sorbents and high-purity materials to minimize background and help...

Seven EPA Methods on One Column Pair (PDF)

... was originally tuned for the analysis of organochlorine pesticides by EPA Method 8081. This is one of the most -CLPesticides2 30 m, 0.32 mm ID, 0.25 μm (cat.# 11324); Sample: Organochlorine Pesticide Mix AB #2, 8-80 μg/ m...

Keep Your Instruments Up and Running with CarboPrep Plus SPE Cartridges (PDF)

.... Unfortunately, for the analysis of organochlorine pesticides in soil and water, the industry standard sample of Organochlorine Pesticides by Electron Capture Detector The Sample CarboPrep Plus CarboPrep Plus Florisil...

CarboPrep Plus Instruction Sheet (PDF)

... for Organochlorine Pesticide Sample Extract Cleanup ~~ ~~ meniscus top frit cartridge bed bottom frit Figure that are commonly used for organochlorine pesticide analysis sample preparation (e.g., retention of 2...

Analyze Seven EPA Methods on One GC Column Pair! Pesticides, PCBs, Herbicides, and More on Rtx-CLPesticides & Rtx-CLPesticides2 Columns (PDF)

... Advantage 8081B (Organochlorine pesticides) Rtx-CLPesticides / Rtx-CLPesticides2 7 / 7 0 / 0 • Increase B set 10 / 9 0 / 0 8081B (extended) (Organochlorine pesticides) Rtx-CLPesticides / Rtx...

Method 8081B: Organochlorine Pesticides Analysis by GC Get results in seven minutes

... for organochlorine pesticide analysis in a variety of difficult sample matrices. The selectivity of the Rtx-CLPesticides column set was originally tuned for organochlorine pesticide analysis, which...

Faster Organochlorine Pesticide Sample Throughput On New Rtx-CLPesticides & Rtx-CLPesticides2 Columns

... for reducing run time for the organochlorine pesticides analyzed under US EPA Method 8081. This method . Figure 1  Baseline resolution of organochlorine pesticides on the 0.18mm ID Rtx ... organochlorine pesticides are resolved in <9 min. We also show complete separation of these compounds in <5...

Large Volume Splitless Injection Using an Unmodified Split/Splitless Inlet and GC-TOFMS for Pesticides and Brominated Flame Retardants (PDF)

.../Splitless Inlet and GC-TOFMS for Pesticides and Brominated Flame Retardants By Michelle Misselwitz and Jack , both with and without sample extract concentration, to analyze pesticides and brominated flame ... , EPA Method 527, CSR-LVSI, pesticides...

Florisil SPE Cleanup for Chlorinated Pesticides Analysis (PDF)

... to use, manufacture, and transport in many areas, organochlorines are a common source of pesticide ), Decachlorobiphenyl (BZ #209) (cat.# 32029), Organochlorine pesticide mix AB #2 (cat.# 32292); Injection: Inj. Vol.: 2...

Restek Essentials: Featured Chromatography Products 2019.4 (PDF)

...More Complete and Consistent Cleanup for Organochlorine Pesticides Keep Your System Clean , chlorinated hydrocarbons, phthalates, phenols, amines, organochlorine pesticides, organophosphorus pesticides...

Method 8081B: Organochlorine Pesticides Analysis by GC (Extended)

... labs extend the list of compounds tested using Method 8081B to include other organochlorine pesticides in a parallel dual-column configuration to reliably quantify 38 commonly analyzed organochlorine pesticides...

Fast, Simple QuEChERS Extraction and Cleanup of Pesticide Residue Samples (PDF)

... Crossbond phase) Application-specific columns for organochlorine pesticides and herbicides. Low bleed and Cleanup of Pesticide Residue Samples Achieve a four-fold increase in sample throughput. Significantly ... sample prep, sample preparation, QuEChERS, dSPE, multiresidue, pesticides, Q-Sep...

Featured Application: Derivatized Amphetamines on Rxi-5Sil MS (PDF)

... compounds, chlorinated hydrocarbons, phthalates, phenols, amines, organochlorine pesticides , organophosphorus pesticides, drugs, solvent impurities, and hydrocarbons. • Temperature range: -60 °C to 350 °C...

Rxi-5Sil MS: Exceptionally Inert Columns for GC/MS and Trace-Level Analyses (PDF)

..., organochlorine pesticides, organophosphorus pesticides, drugs, solvent impurities, and hydrocarbons...

A Guide to the Analysis of Halogenated Environmental Pollutants Using Electron Capture Detection (PDF)

... Organochlorine pesticide mix AB #2 (cat.# 32292) Pesticide surrogate mix, EPA 8080, 8081 (cat.# 32000 -CLPesticides2 Figure 12: Analysis of an extended list of organochlorine pesticides (EPA Method 8081B...

Helium, Hydrogen, or Nitrogen—The Choice is Yours: Unique Rtx-CLPesticides Column Set Provides Optimal Results for Organochlorine Pesticides GC-Micro-ECD Analysis Using Any Carrier Gas

... that employ helium, such as organochlorine pesticides analysis following EPA Method 8081, conversion for organochlorine pesticides analysis by GC-ECD, their unique column selectivities provide optimal resolution...

ChromaBLOGraphy: Phlogisticated Air as a GC Carrier Gas for Organochlorine Pesticide Analysis

What is this guy talking about, phlogisticated air?  Well, that’s what Professor Ellery sometimes called nitrogen when I was still in school at Miskatonic University.  In a previous post, I asked readers to consider nitrogen as a GC carrier gas, and following up on my recent post about hydrogen carrier gas, and in the context [...]

ChromaBLOGraphy: Keep your GC organochlorine pesticide analysis systems up longer by using split injection.

As noted in earlier blogs, “Fast Organochlorine Pesticide Analysis Using Hydrogen Carrier Gas with Split Injection GC-ECD” and “Split Injection Minimizes Endrin and DDT Breakdown for GC-ECD Analysis of Organochlorine Pesticides”, split injection is a viable alternative to splitless injection for analysis of organochlorine pesticides (e.g. when using EPA Method 8081). Notable benefits include: 1.  […]

Keep Your Instruments Up and Running with CarboPrep Plus SPE Cartridges

... of organochlorine pesticides in soil and water, the industry standard sample preparation product—activated Florisil . Florisil Cleanup for the Analysis of Organochlorine Pesticides by Electron Capture Detector ... Keep your organochlorine pesticides analysis GCs up and running by protecting them against matrix...

Increase Sample Throughput with New 15-Minute, Low-Level PAH GC-MS Analysis (PDF)

..., organochlorine pesticides, organophosphorus pesticides, drugs, solvent impurities, and hydrocarbons...

ChromaBLOGraphy: Split Injection Minimizes Endrin and DDT Breakdown for GC-ECD Analysis of Organochlorine Pesticides

In my recent post, Fast Organochlorine Pesticide Analysis Using Hydrogen Carrier Gas with Split Injection GC-ECD, I asked readers to name one big Advantage I left unmentioned for doing split injection for organochlorine pesticide analysis ala EPA Method 8081.  I’m happy to say that Jason Hoisington of SGS quickly responded that split injection would minimize [...]

Accurately Quantify 380 Pesticides Using LC-MS/MS and GC-MS/MS (PDF)

...L/ampul cat.# 32563 (ea.) GC Multiresidue Pesticide Standard #2 (40 components) Organochlorine Compounds Accurately Quantify 380 Pesticides Using LC-MS/MS and GC-MS/MS with Restek’s Multiresidue ... , Pesticides, LC-MS/MS...

Large Volume Splitless Injection Using an Unmodified Split/Splitless Inlet and GC-TOFMS for Pesticides and Brominated Flame Retardants

... (PAHs), total petroleum hydrocarbons (TPH), EPA Method 8270 semivolatiles, organochlorine pesticides concentration, to analyze pesticides and brominated flame retardants in drinking water. When extract ... for analyzing pesticides and brominated flame retardants in drinking water based on EPA Method 527. CSR ... , "EPA Method 527", "CSR-LVSI", pesticides...

ChromaBLOGraphy: QuEChERS Extraction of Seafood — PAHs, Now PCBs and Organochlorine Pesticides

Previous posts on this subject noted good spike recoveries for PAHs at the 10 and 100 ng/g level from seafood, including scallops, shrimp, and oysters. The beauty of QuEChERS is its multiresidue extraction capability, so it was no trouble to report data for PCBs and organochlorine pesticides, in addition to the previously determined PAHs. That’s [...]

GC/MS Analysis of Melamine and Cyanuric Acid Below 1µg/g in Infant Formula (PDF)

..., chlorinated hydrocarbons, phthalates, phenols, amines, organochlorine pesticides, organophosphorus pesticides , Advantage 2008.01, 14-15 (2008). [4] C.F. Poole, Matrix-induced response enhancement in pesticide residue...

Restek Essentials: Featured Chromatography Products 2020.2 (PDF)

..., phthalates, phenols, amines, organochlorine pesticides, organophosphorus pesticides, drugs, solvent , essential oils, hydrocarbons, pesticides, PCB congeners (e.g., Aroclor mixes), sulfur compounds, amines...

ChromaBLOGraphy: Fast Organochlorine Pesticide Analysis Using Hydrogen Carrier Gas with Split Injection GC-ECD

Fast Organochlorine Pesticide Analysis Using Hydrogen Carrier Gas with Split Injection GC-ECD The world is getting faster, but I’m moving slower, about everywhere except my GC, where hydrogen carrier gas keeps me speedy.  Take the organochlorine pesticides (OCPs) standard analyzed below with hydrogen carrier GC-ECD, which shows the 22 OCPs that are part of many [...]

Fast, Simple Sample Cleanup Using QuEChERS SPE Tubes

...ugged, and Safe, the QuEChERS (“catchers”) method for extracting pesticides from food – Samples may be pH adjusted to protect sensitive pesticides and/or solvent-exchanged to improve analysis ... pesticides from food is based on USDA research and employs a novel dispersive solid phase extraction cleanup cleanup using a multiresidue analysis of pesticides on strawberries. ... QuEChERS, dSPE, strawberries, multiresidue, pesticides...

ChromaBLOGraphy: Organochlorine Pesticides Analyzed by Gas Chromatography – Electron Capture Detector with Hydrogen Carrier Gas and Concurrent Solvent Recondensation – Large Volume Splitless Injection

Are you a gas chromatographer feeling the sting from either not getting helium carrier gas or paying too much money for it when it is available?  Hydrogen is a completely viable alternative and I recently used it to do fast GC-ECD organochlorine pesticide analysis with a 30m x 0.25mm x 0.25µm Rtx-CLPesticides column.  I also used [...]

Rtx-BAC Plus 1 and Rtx-BAC Plus 2 Columns (PDF)

... deactivation is ideal for organochlorine pesticides analysis. • Split sample flow—perform dual...

Restek Essentials: Featured Chromatography Products 2020.3 (PDF)

..., resulting in failing calibration checks for your organochlorine pesticides, unscheduled instrument...

Developing New Methods for Pesticides in Dietary Supplements (PDF)

... a need for methods to detect pesticides in these complex, largely botanical products. QuEChERS offers and GCTOFMS, resulting in good recoveries for a wide range of pesticide chemistries in dandelion root powder ... dietary supplements, quechers, cSPE, GMP, PAM 303, pesticides, multiresidue, sample prep...

ChromaBLOGraphy: Using a Merlin MicroSeal Septum to Reduce Endrin and DDT Breakdown for EPA Method 8081b – Organochlorine Pesticides by Gas Chromatography

EPA Method 8081b requires that Endrin and DDT breakdown percentages are less than 15% each to assure that the GC system is inert and ready for action.  Breakdown can be calculated by analyzing a 50/100 pg/µL Endrin/DDT standard and determining production of DDE, DDD, Endrin aldehyde, and Endrin ketone.  Breakdown is exacerbated by activity in [...]

News: Helium, Hydrogen, or Nitrogen—The Choice is Yours: Unique Rtx®-CLPesticides Column Set Provides Optimal Results for Organochlorine Pesticides GC-Micro-ECD Analysis Using Any Carrier Gas

Author(s): Jason Thomas, Chris English, Jack Cochran, Gary Stidsen Restek Corporation Published By: Restek Corporation Year of Publication: 2014 Link: http://www.restek.com/Technical-Resources/Technical-Library/Environmental/env_EVAR1935-UNV Abstract: Using an Rtx®-CLPesticides column set is the best strategy for labs considering alternate carrier gases as a way to … Continue reading

Rxi GC Columns Sales Sheet (PDF)

..., amines, organochlorine pesticides, organophosphorus pesticides, drugs, solvent impurities , essential oils, hydrocarbons, pesticides, PCB congeners (e.g., Aroclor mixes), sulfur compounds, amines...

Improve EPH Testing Accuracy and Efficiency with Resprep EPH Fractionation SPE Cartridges (PDF)

...: Organochlorine Pesticides • CarboPrep: Dirty Samples • EPH Silica: Petroleum • Florisil: Pesticides • Silica , drugs of abuse, pesticides, PCB congeners (e.g., Aroclor mixes), solvent impurities. • Most inert...

Detailed Hydrocarbon Analaysis (DHA) Featuring Rtx-DHA Columns (PDF)

... inertness along the GC flow path. • Optional Siltek deactivation is ideal for organochlorine pesticides...

ChromaBLOGraphy: Enhanced Pesticide Activity When Using Hydrogen as a Carrier Gas

During recent work using the Rtx-CLPesticides and Rtx-CLPesticides2 columns, I was exploring the use of both hydrogen and nitrogen as a carrier gas for analysis of EPA Method 8081 organochlorine pesticides and ran into a bit of a problem when I switched my system over to hydrogen from helium. Several components experienced a dramatic reduction [...]

Faster Semivolatiles Analysis with a Scaled-Down Method and GC Accelerator Kit (PDF)

... hydrocarbons, phthalates, phenols, amines, organochlorine pesticides, organophosphorus pesticides, drugs...

News: Keep Your Instrument Up and Running with CarboPrep Plus SPE Cartridges

Keep your organochlorine pesticide GCs up and running by protecting them against matrix components with superior sample cleanup. Resprep CarboPrep Plus SPE cartridges surpass traditional Florisil products in cleanup power for sample matrix compounds that cause active sites in GC … Continue reading

ChromaBLOGraphy: A Fast Autosampler Injection Can Promote DDT Degradation

I’m continuing my series on Endrin and DDT degradation as part of EPA Method 8081 organochlorine pesticides analysis where I saw in a GC-ECD experiment that the ultra fast injection from the Agilent 7683 autosampler can enhance DDT degradation when using a single taper liner with NO WOOL.  That’s because the liquid sample is thrown [...]

ChromaBLOGraphy: Simple translation of GC methods from helium to hydrogen carrier gas

I had a presentation at PittCon last year discussing using hydrogen and nitrogen carrier gases for the gas chromatography of organochlorine pesticides.  I showed how you can substitute nitrogen at the same linear velocity as hydrogen, while keeping the same oven temperature program used for hydrogen and get a similar chromatogram, albeit with wider peaks […]

High Quality Analysis of Pesticides in Marijuana Using QuEChERS, Cartridge SPE Cleanup, and GCxGC-TOFMS (PDF)

...Technical Article High-Quality Analysis of Pesticides in Cannabis Using QuEChERS, Cartridge SPE assurances for their medication, which could contain harmful levels of pesticide residues. Currently...

Restek GCxGC Columns: Your One Source for 2D Gas Chromatography (PDF)

... (cat.# 32416); Organochlorine pesticide mix AB #1 (cat.# 32291); Diluent: Isooctane; Conc.: 250 pg .......................................4–5 PCBs and BDEs...............................................6 Pesticides in Dietary...

ChromaBLOGraphy: The 33rd International Symposium on Halogenated Persistent Organic Pollutants, Dioxin 2013

The last week of August I attended the POP symposium in the steamy Daegu, Korea.  With over 500 attendees representing 42 countries the technical content was both informative and interesting.  The conference mainly focuses on persistent organic pollutants named in the Stockholm convention.  These include several organochlorine pesticides, polychlorinated dibenzo-p-dioxins (PCDD), polychlorinated dibenzofurans (PCDF), polychlorinated […]

Semivolatile Organic Reference Materials: US EPA Method 8270D/8270C and Appendix IX Target Compounds (PDF)

... (76-44-8) Heptachlor epoxide (isomer B) (1024-57-3) Methoxychlor (72-43-5) Organochlorine Pesticide -38-2) Phorate (298-02-2) Sulfotepp (3689-24-5) Zinophos (thionazine) (297-97-2) Organophosphorus Pesticide...

Seven EPA Methods on One Column Pair Using a micro-ECD Analyze Pesticides, PCBs, Herbicides and More on a Single Rtx-CLPesticides Column Set

Get improved resolution, faster analyses, and less downtime by using Rtx-CLPesticides and Rtx-CLPesticides2 columns for multiple GC/ECD methods. Instead of changing columns between methods, you can save time by analyzing chlorinated pesticides, PCBs, herbicides, and other halogenated compounds on a single column set. Rtx-CLPesticides and Rtx-CLPesticides2 columns have a unique selectivity and outperform other column sets offered specifically for multiple GC/ECD methods.

ChromaBLOGraphy: CSR-LVSI GC-ECD OCPs H2 N2

OK, we’re putting it all together now, a large volume splitless injection of 10 µL onto a 5m x 0.53mm IP Deact retention gap press-fitted to a 30m x 0.25mm x 0.25µm Rtx-CLPesticides column for fast GC-ECD analysis of organochlorine pesticides (OCPs) with either hydrogen or nitrogen carrier gases.  And in this example, the method [...]

ChromaBLOGraphy: Using Hydrogen Carrier at a Lower Flow Rate for GC-MS – Separations Compromised?

In the previous ChromaBLOGraphy post, Simple translation of GC methods from helium to hydrogen carrier gas, I demonstrated two Method Translation approaches to switching GC carrier gas from helium (He) to hydrogen (H2) for GC-ECD of organochlorine pesticides.  The first approach involved going from speed-optimized flow (SOF) for He to SOF for H2, which is faster, […]

ChromaBLOGraphy: More GC Inlet Observations for Endrin and DDT Degradation

OK, by now you’ve probably noticed that I’m obsessing on Endrin and DDT degradation for splitless injection when doing EPA Method 8081b for organochlorine pesticide analysis.  As noted in the previous blog, a fast autosampler injection into a GC inlet liner that does not have glass wool packing can exacerbate DDT degradation by throwing the [...]

Evaluation of Dispersive and Cartridge Solid Phase Extraction (SPE) Cleanups for Multiresidue Pesticides in QuEChERS Extracts of Finished Tobacco Using GCxGC-TOFMS (PDF)

... that included organochlorine, organonitrogen, and organophosphorus pesticides was prepared at Restek and diluted Pesticides in QuEChERS Extracts of Finished Tobacco Using GCxGC-TOFMS By Michelle Misselwitz, Jack Cochran...

ChromaBLOGraphy: A Higher Initial GC Oven Temperature Can Cause DDT Degradation – Is There Anything That Does Not Cause DDT Degradation, Jack?

In recent blogs I’ve relayed a litany of things that can cause DDT degradation when analyzing samples via GC-ECD as part of EPA Method 8081b for organochlorine pesticides, but have you considered that the GC initial oven temperature might also play a role?  (OK, this guy has finally gone off the deep end, because there [...]

Residual Pesticides Analysis of Botanical Ingredients Using Gas Chromatography Triple Quadrupole Mass Spectrometry

...dietary supplements are made from various dried botanicals, which may contain residual pesticides from agric method. Materials and Methods Pesticides standards, internal standards, quality control standards a ... . To be safe from pesticides exposure, residual pesticides must be monitored by chromatographic instrumentation pesticides monitoring in botanical ingredients. ... botanical, GC-MS/MS, QuEChERS, pesticides...

ChromaBLOGraphy: GC-MS with Hydrogen Carrier Gas

At the LECO Australia Separation Science Users Group Meeting last Friday in Sydney, my colleague from South Africa, Peter Gorst-Allman, made a presentation on using hydrogen carrier gas for GC-TOFMS and GCxGC-TOFMS.  His preliminary results were quite encouraging, as he noted no obvious deterioration of mass spectra quality for a wide variety of compounds, including [...]

ChromaBLOGraphy: LPGC – Fast way to your pesticide analysis!

Throughput is one of the most important parameters in the lab. The more samples we can analyze in a day, the sooner we can get home. Enter Low Pressure GC (LPGC) – this is an invention from our brilliant Jaap de Zeeuw [1-2], where a relatively short analytical column (10 – 15 m) with large […]

Comprehensive 2D Gas Chromatography — Making GC Separations Work Harder

... GCxGC analysis of organochlorine pesticides combines primary column and confirmation column results . Organochlorine pesticides separated from interferences in tomato extract...

Lowering Detection Limits for 1,4-Dioxane in Drinking Water Using Large Volume Injection in an Unmodified Splitless GC Inlet (PDF)

... semivolatiles [6], brominated flame retardants [7], as well as many organochlorine, organonitrogen , and organophosphorus pesticides. The CSR-LVSI technique we used is based on the work of application chemists at Thermo...

High-Quality Analysis of Pesticides in Cannabis Using QuEChERS, Cartridge SPE Cleanup, and GCxGC-TOFMS

...Quickly and effectively extract medical marijuana samples for pesticide analysis columns increase accuracy of pesticide determinations for complex samples. Over 20 states ... As medical marijuana is more frequently prescribed, patient safety must be ensured. Pesticide...

ChromaBLOGraphy: Run Faster and Jump Higher in your GC Lab!

When I teach fast GC, I often have students say, “I don’t care about quicker run times because my sample load isn’t that high.” But turnaround time is not the only potential benefit of fast GC. Speeding up your oven program rate produces narrower peaks, which are taller peaks, which can have greater signals-to-noise. And [...]

ChromaBLOGraphy: Donald Duck voices silent and birthday balloons fall everywhere as helium disappears…

I read in a news article that the world’s largest helium reserve in Amarillo, Texas will be gone in five years. Helium is a finite resource, and as a gas chromatographer, this is shocking to me, given that helium is the blood, the life force, for my work. Anyone using helium likely knows its cost [...]

ChromaBLOGraphy: Nitrogen Carrier Gas for GC – Is it Feasible? – Is it Practical?

Jaap de Zeeuw and I discussed nitrogen carrier gas for GC today, its potential benefits, its drawbacks, and how it might be used “successfully” in more laboratories given the finite supply of helium and helium’s higher costs than nitrogen or hydrogen.  As sometimes happens, we don’t always agree on the finer points, so maybe we [...]

ChromaBLOGraphy: Shoot-and-Dilute GC – A Way to Keep GC Systems Up Longer to Help Lower Cost of Analyses

Dilute-and-shoot LC-MS/MS is a selective and sensitive technique often used in determining pesticides in foods.  Because of competitive ionization effects seen with electrospray (ESI) and atmospheric pressure chemical ionization (APCI) methods, quantitative accuracy suffers for trace compounds of interest when matrix coelutions occur.  Dilution of extracts (or sometimes raw samples) is a good way of […]

ChromaBLOGraphy: Fast GC – Another Approach

Jaap de Zeeuw and I are often discussing fast GC, including low-pressure (or vacuum-outlet) GC and smaller inside diameter columns (such as 0.10 or 0.15mm).  I dug out some work I’d done in 2005 with a 0.18mm x 0.18µm Rxi-5ms column, but I cut the column down to 4m to REALLY go fast for some [...]

ChromaBLOGraphy: Phthalate-Free Personal Care Products?

In her recent ChromaBLOGraphy posts, Minimizing Phthalate Interferences Using the Rtx-CLPesticides/Rtx-CLPesticides2 Columns and EPA Regulated Phthalates FREE?, my colleague Dan Li pointed out the ubiquitous nature of phthalates in our world because of their widespread use in plastic consumer products, and that phthalates likely have adverse human health effects, including as endocrine disruptors.  Any of […]

ChromaBLOGraphy: NACRW 2013: Fun (and Science) in the Sun!

  Last week was the 50th Annual Florida Pesticide Residue Workshop…now officially named the North American Chemical Residue Workshop. The conference was held at a beautiful beach resort, but don’t be fooled though there was plenty of science. The program was jammed packed with presentations, panel discussions, forums, posters and exhibits. Topics ranged from pesticide [...]

Enviro

YOUR GUIDE FOR Environmental Sampling and Analysis

Growing Analytical Solutions for Cannabis Testing: Innovative Products and Expertise for Fast, Accurate, Reliable Results (PDF)

... cannabinoids, residual solvents, pesticides, or terpenes by GC, the inertness of your inlet is crucial . For pesticides analysis, a fast, easy cleanup method is required to remove the matrix background for accurate...

ChromaBLOGraphy: A Tale of Two Columns (CLPesticides and CLPesticides2)—Part II: Gaining Speed

In my previous blog post, I gave you a little history of the CLPesticides columns.  You’ll remember that I pointed out the 24 minute run times, which were promoted as being fast at the time.  Fortunately, there are ways to attain faster runs on this column pair for standard 8081 pesticides, due to their awesome […]

ChromaBLOGraphy: Nitrogen Carrier Gas for GC – Reduced Response Because of Slower Oven Program Rate

When you get into a discussion with Jaap de Zeeuw about gas chromatography, you better have the data to back your position.  In fact, that is one of the best things about working with Jaap.  He challenges you to get in the lab and prove your point (or his).  Not that I have to be [...]

Combined Determination of 1,4-Dioxane and Nitrosamine Contaminants in Drinking Water Using SPE and CSR-LVSI GC-MS (PDF)

... organochlorine, organonitrogen, and organophosphorus pesticides. Application chemists at Thermo Scientific have a variety of synthetic chemical processes [8, 9], especially in pesticide and pharmaceutical manufacturing...

News: New QuEChERS Performance Standards Kit From Restek

Sourcing individual pesticide standards and preparing working standards is expensive and time-consuming. Food safety laboratories can simplify standard preparation and better ensure data quality by using Restek’s new QuEChERS performance standards kit for initial method evaluation and ongoing performance validation. … Continue reading

Evaluation of Dispersive and Cartridge Solid Phase Extraction (SPE) Cleanups for Multiresidue Pesticides in QuEChERS Extracts of Finished Tobacco Using GCxGC-TOFMS

.... A custom stock standard that included organochlorine, organonitrogen, and organophosphorus pesticides in the amount of pesticides applied per acre in American agriculture. Even after the processing of tobacco, some ... We compared the efficacy of dSPE and cSPE cleanup methods for multiresidue pesticide analysis of Qu...

ChromaBLOGraphy: Are you experiencing helium supply issues and rising costs?

Helium supply issues are nothing new.  At Restek we have been discussing this off and on for years now.  The following articles and information are just a small selection of what is available on our website and our ChromaBLOGraphy, and are there to help you make informed decisions about alternatives to helium, and reduced helium […]

ChromaBLOGraphy: Minimizing Phthalate Interferences Using the Rtx-CLPesticides/Rtx-CLPesticides2 Columns

Dan Li, Chris English, Jack Cochran, Jason Thomas, and Rebecca Stevens   The alkyl and aryl esters of 1,2-benzenedicarboxylic acid, better known as phthalates, are widely used as plasticizers. Mainly added to polyvinyl chloride (PVC), phthalates make plastic products more durable and flexible. Phthalates are everywhere: plastic toys, PVC water pipes, wallpaper, artificial leather, electrical […]

ChromaBLOGraphy: Who Says There’s Nothing New Happening in GC Forensics?

From an analytical standpoint, GC/MS has been routinely used in forensics labs for decades. It was referred to as the ‘gold standard’ in analyte identification, until the ‘platinum standard’ (I’m sure some vendor coined that moniker) of MS/MS became commercially available. Even though we now have a lot of fancy new instruments at our disposal, […]

Residual Pesticides Analysis of Botanical Ingredients Using Gas Chromatography Triple Quadrupole Mass Spectrometry (PDF)

... mL/ampul ea. 32563 GC Multiresidue Pesticide Standard #2 40 Organochlorine Compounds 100 μg/mL each supplements are made from various dried botanicals, which may contain residual pesticides from agricultural...

ChromaBLOGraphy: Upcoming revisions to three wastewater methods reviewed at NEMC 2017

Monday morning, representatives from the EPA’s wastewater office reviewed the significant changes for the three major GC wastewater methods: 608.3, 624.1, and 625.1. The overarching goals were to modernize the methods and bring the language and QC requirements in line with the methods from the drinking water and hazardous waste offices. The methods have been […]

ChromaBLOGraphy: Capillary GC Column Killers – Part 3

Elemental Sulfur Part 3 of my installment of Capillary GC Column Killers includes a compound known to just about everyone, sulfur. Either analysts have been aware for years that this compound has been in their samples/extracts, or they are surprised when they eventually find out that this compound has been causing their poor chromatography. Many [...]

Frequently Asked Questions: Sample Preparation

Frequently Asked Questions: Sample Preparation FAQ

ChromaBLOGraphy: Pesticides in Dietary Supplements

I was at the Recent Advances in Food Analysis conference in Prague last week and presented work on analyzing pesticides in dietary supplements, a very important subject given that FDA is moving to regulate these products. They are very complex herbal, botanical, etc. materials, which makes looking for trace level components very tricky. My colleagues, [...]

Analysis of Pesticides and Mycotoxins in Cannabis Brownies

... edible products for an extensive list of pesticides and mycotoxins. Here, an effective workflow of pesticides and mycotoxins not only in cannabis flower but also in cannabis-derived goods [1]. For this reason ... for an extensive list of pesticides and mycotoxins. Here, an effective workflow for this complex analysis...

News: Analysis of Pesticides and Mycotoxins in Cannabis Brownies

Author: Nathaly Reyes and Colton Myers Published By: Restek Corporation Year of Publication: 2020 Link: https://www.restek.com/Technical-Resources/Technical-Library/Foods-Flavors-Fragrances/fff_FFAN3149-UNV Abstract: Government regulations in California require the cannabis industry to test edible products for an extensive list of pesticides and mycotoxins. Here, an effective workflow for this … Continue reading

ChromaBLOGraphy: Column Bleed & Septa Bleed – Same Old Thing!

On a seminar trip I was confronted with describing why septa bleed and column bleed are different. My canned answer is that septa bleed has a base peak of m/z 73 and column bleed has a base peak of m/z 207 and we can prove this with a GC-MS. Keep in mind that both column […]

QuEChERS Made Even Easier: Comprehensive Solutions Simplify Sample Prep and Analysis (PDF)

...EChERS technique has evolved to accommodate an expanding list of pesticides in an increasingly diverse list . If you are frustrated with the time and expense of your current pesticide sample cleanup procedure, we...

ChromaBLOGraphy: QuEChERS Extraction of Oil Contaminated Seafood – PAHs

“Growing up” as an environmental analytical chemist, I always think of hydrophobic contaminants, like Polycyclic Aromatic Hydrocarbons (or PAHs), needing hydrophobic solvents to isolate/extract them from hydrophobic matrices, like fish or seafood. (Dang, he’s using hydrophobic so much he must be rabid…) In fact, I’d seen reduced recoveries when trying to QuEChERS extract (with polar [...]

News: Restek’s Jaap de Zeeuw to Present at Food Science 2016 in Singapore

On November 16–17, Separation Science will again host Food Science 2016 in Singapore. This world-class international conference and exhibition covers key food analysis topics including safety, traceability, authenticity, and ingredients analysis. Restek invites you to attend the show at a … Continue reading

ChromaBLOGraphy: Pesticide analysis for cannabis flower: method and data overview

Pesticides in cannabis has been a hot topic lately and we have been getting many requests for help with this analysis. We did work on pesticide residue testing in cannabis about 6 years ago. At that time, we were limited to testing our methods with a small amount of seized material. Recently, we have been […]

ChromaBLOGraphy: EPRW: European Pesticides Residue Workshop in Sunny Cyprus

                                    Just wanted to let everyone know that we have published our presentations we presented at EPRW (European Pesticide Residue Workshop) last month in Limassol, Cyprus. It was a great meeting in a beautiful location. It was a pleasure to […]

ChromaBLOGraphy: George Fong and the Florida Pesticide Residue Workshop

I’m getting ready to head over to the 48th Florida Pesticide Residue Workshop, and it will be a bittersweet conference this year since my friend and colleague, George Fong, is retiring from the meeting after many years of dedicated leadership and oversight.  George and his wife Wilma have been fixtures at the meeting since its [...]

ChromaBLOGraphy: Construction of a Conference – European Pesticide Residue Workshop 2012

The European Pesticide Residue Workshop starts today, June 25, 2012, in the historical city of Vienna, Austria.  This series of conferences runs mainly on the strong efforts of volunteers, including students, one here in Vienna who was kind enough to help me hang six Restek posters today.  You can see the titles of the posters [...]

ChromaBLOGraphy: What pesticides have you eaten today?

This was the question asked by Texas middle school student Liesl Krone, and the driver behind her recent (award winning) science fair project. Liesl became interested in food safety after hearing news reports on food quality issues. She loves fruit and wondered if she was consuming pesticides along with beneficial nutrients. To answer that question, [...]

ChromaBLOGraphy: Team Restek at the Florida Pesticide Residue Workshop

I really consider myself to be lucky at the Florida Pesticide Residue Workshop (FPRW) this week (even though I did not win any of the door prizes!), because I get to work with a fantastic team of Restek people.  You met two of them in previous blogs, Julie Kowalski and Michelle Misselwitz, who were not [...]

News: Restek Chromatographers Share Their Insights at COLACRO XIV

Beautiful Florianópolis in Santa Catarina, Brazil, was the site of this year’s Congresso Latino Americano de Cromatografia e Técnicas Relacionadas (COLACRO). Perhaps the most influential meeting on chromatography in South America, this biannual event was originally scheduled to be in … Continue reading

News: Developing New Methods for Pesticides in Dietary Supplements

Author(s): Julie Kowalski, Michelle Misselwitz, Jason Thomas,  Jack Cochran Published By: Food Safety Magazine Issue: February/March 2012 Year of Publication: 2012 Link: http://www.foodsafetymagazine.com/article.asp?id=3876&sub=sub1 Abstract: New requirements for dietary supplements to be manufactured under current Good Manufacturing Practices (cGMP) regulations have created a … Continue reading

Featured Application: Polar Pesticides in Spinach on Raptor Polar X by LC-MS/MS Fast and Rugged Direct Analysis of Polar Pesticides in Spinach

... of polar pesticides, such as glyphosate, its main metabolite AMPA, and glufosinate, is difficult because pesticides in spinach, excellent chromatographic performance is seen for all three compounds with a total ... This fast, simple LC-MS/MS workflow for the direct analysis of polar pesticides in spinach provides...

ChromaBLOGraphy: Gimme some sugar, baby. Analyte Protectants in Pesticide Analysis.

Scott’s post, “The Solvent Shield”, reminds me of using “analyte protectants” (APs) for determining pesticides in baby food via QuEChERS and GCxGC-TOFMS. A matrix-enhanced response occurs for many polar pesticides in food extracts, versus solvent alone, leading analysts to use “matrix-matched standards” (MMSs) for quantification (standards prepared in pesticide-free food extracts). Sugars and other hydrogen-bonding [...]

News: QuEChERS, GC Smoke Out Tobacco Pesticides

Author(s): Michelle Misselwitz, Jack Cochran, Julie Kowalski Restek Corporation Published By: Chromatography Techniques Year of Publication: 2014 Link: http://www.chromatographytechniques.com/articles/2013/12/quechers-gc-smoke-out-tobacco-pesticides Abstract: Pesticides are used heavily on tobacco in order to increase crop production value; however, limited regulation creates the potential for high … Continue reading

News: New Oregon Cannabis Pesticide Standards—Injecting Confidence in Your Analysis

Restek is pleased to announce the launch of new pesticide residue standards to meet the specific cannabis analysis needs of Oregon—and states with similar pesticide residue regulations/programs. Dissolved in acetonitrile and formulated for stability, the 59 compounds are separated into … Continue reading

Featured Application: Carbamate Pesticides on an Ultra Carbamate LC Column Analyze Carbamate Pesticides in a Fraction of the Time and Boost Productivity

.... Carbamate pesticides are widely used insecticides that pose human and environmental health risks due to their activity as endocrine disruptors. While many pesticides can be analyzed successfully using GC, carbamate ... Carbamate pesticides can be analyzed much faster on an Ultra Carbamate LC column than on a C18...

ChromaBLOGraphy: Creepy Crawly Bedbugs Back in the News Again – Pesticide Resistance

I was watching ABC News yesterday and one of the stories reported was on bedbugs evolving to resist pesticides through toxin breakdown mechanisms via enzymes.  This Ohio State University study supplements earlier findings that genetic changes in bedbugs allow them to protect their nerve cells from pesticides. As Louis Sorkin, an entomologist from the American [...]

ChromaBLOGraphy: Julie Kowalski on the Front Lines at the European Pesticide Residue Workshop

The photo shows Restek’s own Julie Kowalski, Food Innovations Chemist, discussing her European Pesticide Residue Workshop Poster, “Evaluation of the QuEChERS Sample Preparation Method and Comprehensive Two-Dimensional Gas Chromatography for the Analysis of Pesticides in Dietary Supplements”, with an interested workshop attendee.  Both QuEChERS and GCxGC (comprehensive two-dimensional GC) are popular techniques at the conference, [...]

ChromaBLOGraphy: Testing for pesticides in tobacco… QuEChERS makes it easy!!

Whenever it is time to analyze pesticides in complex matrices I always hope that we can use the QuEChERS sample preparation approach and not something more laborious!  The Quick-Easy-Cheap-Effective-Rugged-Safe method was developed for multiresidue pesticides in fruits and vegetables, however we have been using this approach outside of the typical fruit and vegetable matrices with [...]

ChromaBLOGraphy: Restek Colleagues and QuEChERS at the Florida Pesticide Residue Workshop

Jonathan Keim, Michelle Misselwitz, and Julie Kowalski manning the Restek booth at the 47th Florida Pesticide Residue Workshop and showing off the new Restek Q-sep QuEChERS extraction salts packets.

News: Single-Compound Standards from Restek Improve the Analysis of Difficult Pesticides

Troublesome pesticides can be analyzed more easily and accurately with single-compound standards from Restek. New individual standards are now available for dicofol, metribuzin, bromacil, lenacil, dodine, anilazine, captan, and folpet. Use these standards to simplify method development, establish instrument detection … Continue reading

ChromaBLOGraphy: Great Internal Standards for Pesticide Residues…SRMs too!

  In just about all of my pesticide residue work, I use a convenient multicomponent internal standard mix that contains several PCBs as well as popular internal standard compound triphenylphosphate. The mix contains the six compounds in the chromatogram below. I have been working on a method for our GC Multiresidue Pesticides Kit which has […]

ChromaBLOGraphy: Pesticides on Roses – The QuEChERS Sample Preparation Approach

A couple of years ago we had a summer intern in our Innovations lab, Shane Stevens, whose project with us was developing a QuEChERS sample preparation approach for pesticides on cut flowers, including roses.  He presented his work at the 12th Annual Environmental Chemistry Student Symposium at The Pennsylvania State University (PSU) with the distinction of [...]

ChromaBLOGraphy: Jonathan Keim becomes Jonathan Chime at the Florida Pesticide Residue Workshop

Restek Sample Preparation Product Manager, Jonathan Keim, was assigned one of the most important jobs at the 47th Florida Pesticide Residue Workshop, that of xylophone artiste’ to alert conferees who are visiting exhibitors and posters at coffee break to return to the starting Technical Session.  He got the hang of it quickly and his “Smoke [...]

News: Cochran to Present at International Symposia on Recent Developments in Pesticide and POPs Analysis

Restek’s Jack Cochran will be a featured speaker at both the 1st International Symposium on Recent Developments in Pesticide Analysis and the 10th International Symposium on Recent Developments in POPs Analysis. Both symposia are free, two-day events organized by Thermo … Continue reading

ChromaBLOGraphy: The Most Useful Pesticide Standard Ever…monitoring GC inlet “dirtiness”

I have spent most of my time over the past several years testing pesticides and there is one standard that I simply can’t live without…QuEChERS Performance Standards Kit. It is based on a really interesting article* on analyte protectants with a few compounds added. The standard has 40 compounds housed in three vials for long […]

ChromaBLOGraphy: Easy Peasy: Optimized LC-QTRAP Method for Pesticide Residues

Despite what is sometimes advertised, setting up optimized methods for multiresidue pesticide analysis is typically not “easy peasy” and can be quite time consuming. Luckily, some colleagues are willing to share their method with us. Thank you Kelli, James, and Jon!* The downloadable spreadsheet contains retention times, transitions, ionization and collision parameters for our LC […]

ChromaBLOGraphy: The Impact of a Dirty Marijuana Extract on Pesticide Recoveries from a Splitless GC Inlet

In a previous post I told you about our experimentation with marijuana (that didn’t sound right…) and pesticide extraction via QuEChERS.  An important part of that work was cartridge solid phase extraction (cSPE) cleanup with 500mg CarboPrep 90 / 500 mg PSA cartridges.  To minimize losses of planar pesticides (e.g hexachlorobenzene), which we know can [...]

ChromaBLOGraphy: Florida Pesticide Residue Workshop – July 18-21

If you are a pesticide residue chemist, or you have a hankering to learn about veterinary drug analyses, then this meeting could be for you.  In addition, FPRW is sponsoring a special session on Sun, July 18, for discussion of analytical issues surrounding the recent BP Gulf oil spill.  For that, we are pleased to have [...]

News: New Pesticide CRMs Released Specifically for Cannabis Labs in California and Similar States

Restek’s support for cannabis-testing labs continues to grow. This latest offering will help you meet the specific cannabis analysis needs of California set forth by the Bureau of Cannabis Control for regulated category I and II residual pesticide reporting—and of … Continue reading

ChromaBLOGraphy: Two for the Price of One? Using CPP to Simultaneously Clean Pesticide and PCB Extracts

In a recently published blog, we introduced the advantages of cleaning EPA Method 8081 extracts using CarboPrep Plus (CPP) as a replacement.  The sample preparation for PCBs by EPA Method 8082 is commonly combined with the pesticides EPA Method 8081 for the extraction step then split into two portions for sample cleanup.  The logical question […]

ChromaBLOGraphy: Maybe a rose is a rose is a rose, but a “5” is not a “5”, when it comes to pesticide analysis…

Greetings from South Africa, where I did a recent lecture on GC column selectivity and got the age-old question, “Are all “5” phases (5% diphenyl type) the same?” One easy answer, and you’ll certainly notice it if you are a pesticide chemist, is that the Rxi-5ms, a pendant-based 5% phenyl column, is definitely NOT the [...]

ChromaBLOGraphy: Restek at the Florida Pesticide Residue Workshop Starting July 18

  Join me and my colleagues Michelle Misselwitz, Julie Kowalski, and Jonathan Keim at the Florida Pesticide Residue Workshop next week for some fun science.  In addition to the offerings below, we’ll also be handing out some sweet treats (hint: one of my co-workers has the same initials) at our exhibition booth.  Restek Seminar   Sunday, July 18, [...]

ChromaBLOGraphy: Michelle Misselwitz Does Dietary Supplements at Florida Pesticide Residue Workshop

No, I’m not revealing any of Michelle’s personal habits here. But I do want to say what a great job she did talking about QuEChERS, cartridge SPE, and GCxGC-TOFMS for the analysis of pesticides in dietary supplements at the Restek vendor seminar at FPRW last night (Sunday). Her talk was visually stimulating, great graphics, and [...]

ChromaBLOGraphy: Steve Lehotay of USDA Gives Keynote Lecture at European Pesticide Residue Workshop 2012

Steve Lehotay of the USDA, a co-inventor of the QuEChERS sample preparation approach, delivered the opening lecture of EPRW 2012, “MMM means multiclass, multiresidue method, which accommodates more more more, but when is “more” enough?”.  His main point seemed to be that as analytical chemists we need to have good reason for our pesticide residue [...]

ChromaBLOGraphy: Selectivity differences in arylene GC phases…pesticides and zebras.

Although not obvious even to a careful observer, no zebra has exactly the same stripe pattern. Fortunately for GCers, there isn’t that much variation in “5 type” columns, but users need to be aware that 5% pendant phenyl and 5% phenyl-as-silphenylene (or arylene) columns have slightly different selectivities. Recently we analyzed 31 pesticides on Rxi-5ms [...]

Method 505: Analysis of Organohalide Pesticides and Commercial PCBs in Water by Microextraction and GC by Microextraction and Gas Chromatography

... in part to the role of pesticides and herbicides in mitigating the devastating effects of many plant contamination. EPA Method 505 is used for organohalide pesticide analysis in drinking and ground water...

ChromaBLOGraphy: Tips on the analysis of pesticides and mycotoxins in cannabis products: Matrix matters! (Part II)

In part I of this blog series, we learned about matrix effects, how to assess them, and how to address them (you can check the blog here). One of the main conclusions of part I was the importance of using matrix matched calibration as the means to account for possible ionization effects in LC-MS/MS, and […]

ChromaBLOGraphy: Tips on the analysis of pesticides and mycotoxins in cannabis products: Matrix matters! (Part I)

The growing variety of cannabis products that are currently available in the market speaks volumes about the creativity of entrepreneurs within the industry. Vapes, lotions, balms, cookies, hard candy, gummies, infused drinks, chocolate, fudge, soaps, and tinctures are only a handful of the product types that are currently being commercialized in this ever-growing market. Such […]

ChromaBLOGraphy: Keep your nut warm this winter and improve GC pesticide response.

Hello from the Southern Hemisphere (Stellenbosch, South Africa), where the temperature is likely much warmer than central PA, my usual lab haunt. First, I’d like to acknowledge some chromatographers from this world area and encourage you to seek out their publications to know that innovative work is not the sole domain of the North. Ben [...]

QuEChERS Solutions

Learn how to use the QuEChERS approach to perform faster, easier sample preparation and cleanup for multiresidue pesticide analysis. Q-sep QuEChERS p...

ChromaBLOGraphy: From the Front Lines: Waging War on Bugs.

In 1901 the bacterium Bacillus thermingiesis (Bt) was found to be lethal to silkworms and soon after it was introduced as a pesticide for moths (order Lepidoptera). It was not until 1956 that the method of toxicity of this protein was understood by researchers and by 1961 the US EPA registered the pesticide for commercial [...]

Matrix Effects in Multi-Residue Pesticide Analysis When Using Liquid Chromatography-Tandem Mass Spectrometry

... Nutrition. His research interests focus on trace analysis of various contaminants, such as pesticides and mycotoxins, in foods using LC/MS and GC/MS. Consumption of pesticide-contaminated food via daily ... Matrix effects present a significant challenge to multi-residue pesticide analysis of food samples...

Comparing Pesticide Residues in Amish and Commercially Grown Strawberries and Spinach Using QuEChERS, Various dSPE Sorbents, and GC-TOFMS

...SPE cleanup, and GC-TOFMS analysis were used to assess pesticide levels in strawberries and spinach from both effective. Good recoveries were obtained for most pesticides; however, low recoveries were observed for some ... QuEChERS extraction, dSPE cleanup, and GC-TOFMS analysis were used to assess pesticide residue...

Lowering Detection Limits for 1,4-Dioxane in Drinking Water Using Large Volume Injection in an Unmodified Splitless GC Inlet

... semivolatiles [6], brominated flame retardants [7], as well as many organochlorine, organonitrogen , and organophosphorus pesticides. The CSR-LVSI technique we used is based on the work of application chemists at Thermo...

Cannabis

We have the industry’s most comprehensive selection of cannabinoid-related certified reference materials (CRMs), manufactured and QC tested in our ...

ChromaBLOGraphy: Pesticides are like Siblings, They Don’t Always Get Along part 2 – now with the GC mix!

Last year my colleague Landon publish his blog about pesticide multiresidue LC mix stability in a celery matrix and in a solvent. Today, I’d like to show you what happens when you do this with the GC multiresidue pesticide kit. On day 0, I prepared stock solutions from all 9 ampules of the GC multiresidue […]

ChromaBLOGraphy: Improve Retention and Peak Shape for Early-Eluting Pesticides in LC-MS/MS

How important is the HPLC column in a comprehensive LC-MS/MS screening method? LC-MS/MS is quickly gaining acceptance for residue testing, and can simultaneously monitor hundreds of pesticides, including those difficult to detect by GC. With such a powerful detector, hasn’t the column become simply a sample inlet device? While the MS/MS detector allows for specific, [...]

ChromaBLOGraphy: Analyzing pesticides in herbal tea using QuEChERS and GCxGC-TOFMS of course!

Herbal tea, a non-caffeinated drink made from plants, herbs, or spices has been used throughout history for its potential medicinal benefit.   Various herbal material is mixed depending on the desired medicinal or flavor properties for the tea.   As with any plant based commodity, there is the potential for pesticide residues to remain in the final […]

News: Fortify or Calibrate for 203 Pesticides by GC-MS/MS With This Single Restek® CRM Kit

GC-MS/MS is the technique of choice for analyzing pesticide residues in many fruits, vegetables, botanicals, and herbals like tea, ginseng, ginger, Echinacea, and dietary supplements. And Restek’s new GC-MS/MS pesticide reference standards kit contains over two hundred compounds pulled from … Continue reading

ChromaBLOGraphy: LC-MS/MS the Future of New Pesticide Analysis According to Speakers at FPRW

Two representatives from companies who make crop protection/science chemicals (pesticides, etc.) spoke at the Florida Pesticide Residue Workshop this week.  Tom Gould of Bayer Crop Science gave the presentation Conversion of Three Old Style Analytical Methods to LC/MS-MS Technology Utilizing Isotopic Internal Standards and Jim Stry of DuPont Crop Protection talked on Trends in Residue [...]

ChromaBLOGraphy: Calculating Splitless Valve Time for Splitless Injection GC with the New EZGC Method Translator and Flow Calculator – Pesticides

Properly setting the splitless valve time (SVT) for splitless injection in gas chromatography (GC) is probably one of the most overlooked optimization parameters for pesticide analysis today.  Having too short of a SVT leads to poor transfer of active and involatile pesticides, especially as the liner becomes contaminated with “dirt” from injected sample extracts.  This […]

ChromaBLOGraphy: Pesticides are like Siblings – some get along well and some don’t – No. . .Really?

My colleague, Joe Konschnik and I have been asked by many food chemists out there about how much they can trust their pesticides mixes after they combine them into one single larger mixture for calibrating their instrument, or monitoring the accuracy and precision of their method – and rightfully so.  Well, like siblings, sometimes they […]

News: Pyrethrins CRM Added to Restek Single-Compound Standards List for Improved Analysis of Difficult Pesticides

Troublesome pesticides can be analyzed more easily and accurately with single-compound standards from Restek. We’ve just added a new pyrethrins CRM to our inventory, so individual reference standards are now available for dicofol, metribuzin, bromacil, lenacil, dodine, anilazine, captan, folpet, … Continue reading

ChromaBLOGraphy: QuEChERS Acetonitrile Injections Still Problematic for Gas Chromatographers at the European Pesticide Residue Workshop

Acclaimed pesticide residue chemist Richard Fussell from the Food and Environmental Research Agency in the UK gave an excellent talk today at EPRW called “High Sensitivity GC-MS/MS: A Robust Technique for the Direct Analysis of Pesticides in QuEChERS Acetonitrile Extracts”.  One of the main themes of his talk was using more sensitive instrumentation to deal [...]

News: Mitigate Matrix Interference With New Isotopically Labeled Pesticide Residue Internal Standards From Restek

Any food safety chemist can attest that interference is a major concern when performing pesticide residue analysis. But with the release of its expanded line of internal and surrogate reference standards, Restek now offers enough options to mitigate interference in … Continue reading

News: Accurately Detect and Quantify 204 Pesticides of Global Food Safety Concern by LC-MS/MS

Stop spending your time and money developing LC-MS/MS multi-residue pesticide methods and mixing reference standards when you could be running samples! Restek’s trusted food safety experts have already done the work for you—with guaranteed accuracy and at a lower cost. … Continue reading

News: Matrix Effects in Multi-Residue Pesticide Analysis When Using Liquid Chromatography-Tandem Mass Spectrometry

Author(s): Kai Zhang Published By: Restek Corporation Year of Publication: 2011 Link:http://www.restek.com/Technical-Resources/Technical-Library/Editorial/mis_0026 Abstract: Matrix effects present a significant challenge to multi-residue pesticide analysis of food samples using LC/MS/MS. In this editorial, Dr. Kai Zhang, of the FDA Center for Food … Continue reading

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