Restek Q-sep® QuEChERS Products

Restek Q-sep® QuEChERS Products

Q-sep QuEChERS Extraction Salts

Fast, Simple Sample Prep for Multiresidue 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.

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 reliableUL, CSA, and CE approved; 1-year warranty.

Q-sep QuEChERS dSPE Tubes for Extract Cleanup

Fast, Simple Sample Prep for Multiresidue Pesticide Analysis

  • Packaged in foil subpacks of 10 for enhanced protection and storage stability.
  • Ready-to-use tubes, no glassware required.
  • Preweighed, ultra-pure sorbents.
  • Support original unbuffered, AOAC (2007.01), European (EN 15662), and mini-multiresidue QuEChERS methods.

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 Performance Standards

  • Designed for use in all QuEChERS methods for pesticides in fruits and vegetables, including the original unbuffered method, AOAC 2007.01, and EN15662.
  • Kit contains organochlorine, organonitrogen, organophosphorus, and carbamate pesticides commonly used on fruits and vegetables.
  • Volatile, polar, active, base-sensitive, and nonvolatile compounds are included to allow comprehensive evaluation of QuEChERS extraction and cleanup efficiencies, and optimization of GC and LC instrumental conditions.
  • Ideal for initial method evaluations and ongoing method performance validations.
  • Precise formulations improve data quality and operational efficiency; spend more time running samples and less time sourcing and preparing standards.
  • Quantitatively analyzed to confirm the composition and stability of each mixture.
  • Produced and tested in accordance with ISO Guide 34 and 17025 accreditation.

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.

LC Multiresidue Pesticide Kit

  • Accurately detect and quantify pesticides of global food safety concern in a wide range of fruits, vegetables, and other commodities by LC-MS/MS.
  • Full kit contains 204 compounds of interest, covering many LC-determined pesticides listed by government agencies; individual ampuls also sold separately.

Rxi-5Sil MS Columns (fused silica)

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

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

Ultra Aqueous C18 Columns (USP L1)

Particle Size: 3 µm or 5 µm, spherical
Pore Size: 100 Å
Carbon Load: 15%
End-Cap: no
pH Range: 2.5 to 8
Temperature Limit: 80 °C
USP Phase Code: L1
Phase Category: modified C18
Ligand Type: proprietary polar modified and functionally bonded C18

5.0 mm ID Straight Inlet Liner

for Agilent GCs equipped with split/splitless inlets

5.0 mm ID Single Taper 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

Technical Articles

Foods, Flavors & Fragrances

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

We compared the efficacy of dSPE and cSPE cleanup methods for multiresidue pesticide analysis of QuEChERS extracts of finished tobacco products using GCxGC-TOFMS. Cleanup with dSPE tubes containing 7.5 mg of GCB and 25 mg of PSA produced better results than other methods, with average recoveries of 92% and 91% for 500 ppb and 50 ppb fortifications respectively.

Foods, Flavors & Fragrances

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.

PDF Document

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)

PDF Document

QuEChERS Methodology: Original Unbuffered Method Instruction Sheet

Instruction Sheet for QuEChERS Methodology: Original Unbuffered Method. Q-sep Packets—cat.# 23991 and 23992 (PDF - 225kB)

PDF Document

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 - 2874kB)

PDF Document

Mitigating Matrix Effects: Examination of Dilution, QuEChERS, and Calibration Strategies for LC-MS/MS Analysis of Pesticide Residues in Diverse Food Types

LC-MS/MS is popular for monitoring pesticide residues in food due to its selectivity and sensitivity; however, matrix effects can cause poor data quality and difficult quantification. We evaluated the relative effectiveness of sample dilution, QuEChERS cleanup, solvent-based calibration, and matrix-matched calibration strategies to mitigate matrix effects in celery, kale, avocado, lime, and brown rice flour. (PDF - 597kB)

PDF Document

QuEChERS Methodology: AOAC Approach Instruction Sheet

Instruction Sheet for QuEChERS Methodology: AOAC Approach. (PDF - 159kB)

PDF Document

QuEChERS Methodology: European and Mini-Multiresidue Method Instruction Sheet

Instruction Sheet for QuEChERS Methodology: European and Mini-Multiresidue Method. (PDF - 175kB)

PDF Document

Q-sep dSPE Sample Clean-up Instruction Sheet

Instruction Sheet for Q-sep dSPE Sample Clean-up. (PDF - 315kB)

PDF Document

Developing New Methods for Pesticides in Dietary Supplements

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 - 5523kB)

PDF Document
PDF Document

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 - 1180kB)

PDF Document

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)

PDF Document

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)