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Q-sep™ QuEChERS Extraction Salts

Fast, Simple Sample Prep for Multi-Residue Pesticide Analysis

Salt packets eliminate the need for a second empty tube to transfer salts.
Go green by using packets with reusable tubes.
Convenient and easy to use.
Ready-to-use tubes, no glassware required.
Preweighed, ultra-pure sorbents.
Support original unbuffered, AOAC (2007.01) and European (EN 15662) QuEChERS methods.
Click here for more information on our QuEChERS products.

Click here for an audio slideshow.

Q-sep™ 3000 Centrifuge

for QuEChERS

Meets or exceeds requirements of Original Unbuffered, AOAC, and European QuEChERS methodology.
Supports 50 mL, 15 mL, and 2 mL centrifuge tubes.
Small footprint requires less bench space.
Safe and reliable—UL, CSA, and CE approved, 1-year warranty.

Click here for more information on our QuEChERS products.

Q-sep™ QuEChERS dSPE Tubes for Extract Clean-Up

Fast, Simple Sample Prep for Multi-Residue Pesticide Analysis

Packaged in mylar subpacks for enhanced protection and storage stability.
Individually labeled tubes for easy sorbent identification.
Ready-to-use tubes, no glassware required.
Preweighed, ultra-pure sorbents.
Support original unbuffered, AOAC (2007.01) and European (EN 15662) QuEChERS methods.
Click here for more information on our QuEChERS products.

Click here for an audio slideshow.

Q-sep™ Tube Racks

Available for 2 mL, 15 mL, and 50 mL tubes.
Alphanumerical grid reference on top tier for easy identification of samples.
Easy to assemble, simply fold and snap together securely.

QuEChERS Internal Standards and Quality Control Standards

Single and multiple component standards as specified in EN Method 15662.
Support for GC and HPLC with MS, MS/MS, and selective detectors.
Ready to use for QuEChERS extractions—no dilutions necessary.

Rxi^®-5Sil MS Columns (fused silica)

(low polarity Crossbond® silarylene phase; similar to 5% phenyl/95% dimethyl polysiloxane)

Engineered to be a low bleed GC/MS column.
Excellent inertness for active compounds.
General purpose columns—ideal for GC/MS analysis of polycyclic aromatic compounds, chlorinated hydrocarbons, phthalates, phenols, amines, organochlorine pesticides, organophosphorus pesticides, drugs, solvent impurities, and hydrocarbons.
Temperature range: -60 °C to 350 °C.

Click here for more information on our Rxi® columns.

Ultra Aqueous C18 Columns (USP L1)

particle size: 3µm or 5µm, spherical
pore size: 100Å
carbon load: 15%
endcap: no
pH range: 2.5 to 8
temperature limit: 80°C

Highly retentive and selective for reversed phase separations of polar analytes. Highly base-deactivated. Compatible with highly aqueous (up to 100%) mobile phases. Part of the Restek USLC™ column set, which offers the widest range of reversed phase selectivity available!

5.0mm ID Straight Inlet Liner

For Agilent GCs equipped with split/splitless inlets

5.0mm ID Single Gooseneck Inlet Liner

For Agilent GCs equipped with split/splitless inlets

Introduction to QuEChERS

Jack Cochran, Director of New Business and Technology at Restek, gives a brief overview of the QuEChERS process, and how it can simplify your sample preparation workflow.

Sample Preparation of Cannabinoids in Urine Using the QuEChERS Method and dSPE Cleanup

This webinar introduces QuEChERS and dSPE and discusses their application to sample prep for GC/MS analysis of cannabinoids in urine. Attendees will learn how to increase sample throughput with this simple approach.

Narrated by Amanda Rigdon, Pharmaceutical Innovations Chemist.

Analysis of Veterinary Drug Residues using a Unique HPLC Biphenyl Stationary Phase

Analysis of veterinary drug residues in milk using a QuEChERS approach and Biphenyl column is discussed. Better retention is achieved, compared to C18 or phenyl phases, improving separation of analytes and matrix components.

Narrated by Julie Kowalski, Foods, Flavors & Fragrances Applications Chemist. Length: 24 minutes

QuEChERS Approach

QuEChERS Bibliography

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

QuEChERS extraction, dSPE cleanup, and GC-TOFMS analysis were used to assess pesticide residue levels in strawberry and spinach from both commercial and Amish growers. Various dSPE sorbent products were compared to determine which were most effective.

Determining Pesticides in Dietary Supplements with QuEChERS Extraction, Cartridge SPE, and GCxGC-TOFMS

The novel approach used here combines QuEChERS extraction, cartridge SPE cleanup, and GCxGC-TOFMS analysis, resulting in good recoveries for a wide range of pesticides in dietary supplements. Matrices include dandelion root, sage, and a multi-herb finished product. (PDF - 394kB)

QuEChERS Methodology: Original Unbuffered Method Instruction Sheet

Instruction Sheet for QuEChERS Methodology: Original Unbuffered Method. (PDF - 225kB)

QuEChERS Products: Fast, Simple Sample Prep for Multiresidue Pesticide Analysis

Learn how to use the QuEChERS approach to perform faster, easier sample preparation and cleanup for multiresidue pesticide analysis. Q-sep™ QuEChERS products save time, money, and materials compared to modified Luke methods. (PDF - 719kB)

QuEChERS is a simple, effective approach to sample prep that can be applied to the analysis of pesticides in dietary supplements. Here we demonstrate a QuEChERS, cSPE, GC-TOFMS procedure that results in good recoveries for a wide range of pesticides in dandelion root. (PDF - 258kB)

Optimizing Dispersive Solid Phase Extraction and Splitless Injection Gas Chromatography for QuEChERS Fruit and Vegetable Extracts

Fast, Simple QuEChERS Extraction and Cleanup of Pesticide Residue Samples

QuEChERS dSPE methods simplify extract cleanup, reduce material costs, and improve sample throughput. Here we demonstrate the effectiveness of QuEChERS sample cleanup using a multiresidue analysis of pesticides on strawberries. (PDF - 158kB)

Fast Screening of Recalled Tylenol® for Tribromoanisole and Related Adulterants

The recent recall of Tylenol® pain reliever and other related products highlights the need for simple, quick sample preparation and a comprehensive analytical method for adulterants in consumer products. The rush to examine a multitude of samples in a short period of time is a common scenario for potential recalls, especially when a contaminant is found in a given product and rapid determinations need to be made to assess how widespread the problem may be. (PDF - 288kB)

How Column Inertness Improves the Chromatography of Basic Compounds

Not all column deactivations are appropriate for analyzing basic compounds. Here we demonstrate the effect of column inertness on peak shape, and discuss its role in improving method accuracy, sensitivity, and development time. (PDF - 227kB)

Carfentrazone Ethyl in Dandelion Root Powder (Dietary Supplement) on Rxi^®-5Sil MS

GC_FF1172

dSPE vs. cSPE Sample Cleanup of Dandelion Root Powder (Dietary Supplement) on Rxi^®-5Sil MS

GC_FF1171

Pesticides in QuEChERS Extract of Sweet Potato on Rxi^®-5Sil MS

GC_FF01133

Pesticides in QuEChERS Extract of Sweet Potato on Rxi^®-5Sil MS

GC_FF1125

Polycyclic Aromatic Hydrocarbons Infant Formula with and without QuEChERS dSPE Clean-up on Rxi^®-5Sil MS

GC_FF01123

Restek Q-sep™ QuEChERS Products

Fast, Simple Sample Prep for Multi-Residue Pesticide Analysis

for QuEChERS

Fast, Simple Sample Prep for Multi-Residue Pesticide Analysis

(low polarity Crossbond® silarylene phase; similar to 5% phenyl/95% dimethyl polysiloxane)

For Agilent GCs equipped with split/splitless inlets

For Agilent GCs equipped with split/splitless inlets

QuEChERS extraction, dSPE cleanup, and GC-TOFMS analysis were used to assess pesticide residue levels in strawberry and spinach from both commercial and Amish growers. Various dSPE sorbent products were compared to determine which were most effective.

The novel approach used here combines QuEChERS extraction, cartridge SPE cleanup, and GCxGC-TOFMS analysis, resulting in good recoveries for a wide range of pesticides in dietary supplements. Matrices include dandelion root, sage, and a multi-herb finished product. (PDF - 394kB)

Instruction Sheet for QuEChERS Methodology: Original Unbuffered Method. (PDF - 225kB)

Learn how to use the QuEChERS approach to perform faster, easier sample preparation and cleanup for multiresidue pesticide analysis. Q-sep™ QuEChERS products save time, money, and materials compared to modified Luke methods. (PDF - 719kB)

QuEChERS is a simple, effective approach to sample prep that can be applied to the analysis of pesticides in dietary supplements. Here we demonstrate a QuEChERS, cSPE, GC-TOFMS procedure that results in good recoveries for a wide range of pesticides in dandelion root. (PDF - 258kB)

QuEChERS dSPE methods simplify extract cleanup, reduce material costs, and improve sample throughput. Here we demonstrate the effectiveness of QuEChERS sample cleanup using a multiresidue analysis of pesticides on strawberries. (PDF - 158kB)

Not all column deactivations are appropriate for analyzing basic compounds. Here we demonstrate the effect of column inertness on peak shape, and discuss its role in improving method accuracy, sensitivity, and development time. (PDF - 227kB)

GC_FF1172

GC_FF1171

GC_FF01133

GC_FF1125

GC_FF01123

GC_GN1153