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55447-U Supelco

Supel QuE

Verde Tube, centrifuge tube volume 2 mL, pack of 100 ea

Synonym: QuEChERS

  •  NACRES NB.21

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Properties

Related Categories Analytical/Chromatography, Sample Preparation & Purification, Solid Phase Extraction (SPE), Supel QuE (QuEChERS) Products, Supel QuE Verde for Challenging Compounds in Green Matrices More...
Quality Level   100
composition   magnesium sulfate, 150 mg
  Supelclean ENVI-Carb Y, 10 mg
  Supelclean PSA, 50 mg
  Z-Sep+, 60 mg
packaging   pack of 100 ea
centrifuge tube volume   2 mL
Featured Industry   Food and Beverages

Description

General description

Dispersive SPE (dSPE), often referred to as the "QuEChERS" method (Quick, Easy, Cheap, Effective, Rugged, and Safe), is modern sample prep technique that is becoming increasingly popular in the area of multi-residue pesticide analysis in food and agricultural products.

Using the QuEChERS method, food/agricultural samples are first extracted with an aqueous miscible solvent (e.g., acetonitrile) in the presence of high amounts of salts (e.g., sodium chloride and magnesium sulfate) and/or buffering agents (e.g. citrate) to induce liquid phase separation and stabilize acid and base labile pesticides, respectively. Upon shaking and centrifugation, an aliquot of the organic phase is subjected to further cleanup using SPE. Unlike traditional methods using SPE tubes, in dispersive SPE, cleanup is facilitated by mixing bulk amounts of SPE (e.g., Supelclean PSA, ENVI-Carb, and/or Discovery DSC-18) with the extract. After sample cleanup, the mixture is centrifuged and the resulting supernatant can either be analyzed directly or can be subjected to minor further treatment before analysis.

Supelco carries a line of vials and centrifuge tubes containing pre-determined amounts of salts and SPE sorbents to support the most common method configurations used today.

Suitability

Designed to provide high recovery all pesticides, including problematic planar pesticides, in samples containing high levels of chlorophyll (e.g. cannabis, spinach, lettuce, oregano, etc.). Ideal for cleanup of 1 mL extract after initial food extraction and phase partitioning.

Legal Information

AOAC is a registered trademark of AOAC International

Supel is a trademark of Sigma-Aldrich Co. LLC

Safety & Documentation

Safety Information

RIDADR 
UN 3261 8 / PGII
Protocols & Articles

Articles

Approaches to the Analysis of the Oregon List of Pesticides in Cannabis Using QuEChERS Extraction and Cleanup

Consumption of cannabis and / or cannabis-based products is currently legal in some form in 33 US states plus the District of Columbia. Testing of the plant materials and products is required by many...
Keywords: Adsorption, Capillary electrophoresis, Environmental, Fungicides, Gas chromatography, Gas chromatography mass spectrometry, High performance liquid chromatography, Liquid chromatography mass spectrometry, Mass selective detector, Mass spectrometry, Oxidations, Pesticides, Reductions, Separation

Comparison of QuEChERS Products for the Extraction of Planar Pesticides from Spinach

Hexachlorobenzene and chlorothalonil are pesticides with planar structures that are commonly used during the cultivation of spinach and other leafy, green crops. The presence of large pigment molecul...
Michael Ye, Jennifer Claus
Reporter US Volume 34.3
Keywords: Adsorption, Gas chromatography, High performance liquid chromatography, Mass selective detector, Mass spectrometry, Pesticides

Extraction of Planar Pesticides from Spinach and Fresh Oregano Using QuEChERS Methodology With a Novel Carbon Adsorbent

Although vital to plant life, the presence of chlorophyll in GC/MS analysis is highly problematic. Chlorophyll, a pigment of high molecular weight, is known to quickly cause fouling of injection line...
Michael Ye, and Jennifer Claus
Reporter US Volume 34.2
Keywords: Gas chromatography, Mass spectrometry, Pesticides

LC/MS/MS Analysis of Pesticides in Cannabis on the Ascentis RP-Amide after QuEChERS Extraction and Cleanup Using Supel QuE Verde

From our library of Articles, Sigma-Aldrich presents LC/MS/MS Analysis of Pesticides in Cannabis on the Ascentis RP-Amide after QuEChERS Extraction and Cleanup Using Supel QuE Verde
Keywords: High performance liquid chromatography, Mass spectrometry, Pesticides, Reductions

Related Content

SPE Cartridges (Tubes) - Phase Selection Guide

The SPE Tube Configuraton Guide will help you choose the appropriate bed weight and cartridge dimensions.
Keywords: Agriculture, Calorimetry, Environmental, Fractionation, High performance liquid chromatography, Liquid chromatography mass spectrometry, Mass spectrometry, Pesticides, Pharmaceutical, Solid phase extractions

Peer-Reviewed Papers
15

References

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