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Q-sep™ QuEChERS Tubes for Pesticide Residue Analysis

Laboratory Equipment Magazine's 2009 Readers' Choice Awards Winner!

Now packaged in mylar subpacks for enhanced protection and storage stability.

Individually labeled tubes for easy sorbent identification.

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Fast, simple sample extraction and cleanup using dSPE.
Fourfold increases in sample throughput.
Fourfold decreases in material cost.
Convenient, ready to use centrifuge tubes with ultra pure, preweighed adsorbent mixes.

Quick, Easy, Cheap, Effective, Rugged, and Safe, the QuEChERS ("catchers") method, developed by the USDA Eastern Regional Research Center¹, has become very popular for extraction and clean-up of pesticide residue samples. Our products are available in three centrifuge tube sizes to meet the needs of both extraction and cleanup of a wide variety of sample matrices following various methods.
The researchers developed a simple two-step procedure. First, the homogenized samples are extracted and partitioned, using an organic solvent and salt solution. Then, the supernatant is further extracted and cleaned, using a dispersive SPE technique. Multiple adsorbents are placed in a centrifuge tube, along with the 1mL of organic solvent and the extracted residues partitioned from step 1. The contents are thoroughly mixed, then centrifuged, producing a clean extract ready for a variety of GC or HPLC analytical techniques.² Validation and proficiency data for the QuEChERS method are available for a wide variety of pesticides in several common food matrices at www.quechers.com

Multiple sorbents are used to extract different types of interferences.
MgSO4 removes excess water
PSA* removes sugars, fatty acids, organic acids, and anthocyanine pigments
C18 removes nonpolar interferences
GCB* removes pigments, sterols, and nonpolar interferences

Instruction Sheets:

805-01-003.pdf

805-01-002.pdf

805-01-001.pdf

FREE sample packs available. Use these handy packs for method development or to compare with your current brand. Request yours today by adding -248 to the part number. Sample pack orders cannot be placed online—please call. Limit one sample pack per customer.

Description	Material	Method	qty.	Cat.#	Price	Wish list	Cart
50mL Centrifuge Tubes for Sample Extraction
Q110	4g MgSO4, 1g NaCl, 1g trisodium citrate dihydrate, .5g disodium hydrogencitrate sesquihydrate	European EN 15662	50-pk.	26213

Q150	6g MgSO4, 1.5g NaOAc	AOAC 2007.1	50-pk.	26214

Empty 50mL Centrifuge Tube	--	European EN 15662, AOAC 2007.1	25-pk.	26227

2mL Micro-Centrifuge Tubes for dSPE (clean-up of 1mL extract)
Q210	150mg MgSO4, 25mg PSA	European EN 15662	100-pk.	26215

Q211	150mg MgSO4, 25mg PSA, 25mg C18	--	100-pk.	26216

Q212	150mg MgSO4, 25mg PSA, 2.5mg GCB	European EN 15662	100-pk.	26217

Q213	150mg MgSO4, 25mg PSA, 7.5mg GCB	European EN 15662	100-pk.	26218

Q250	150mg MgSO4, 50mg PSA	AOAC 2007.1	100-pk.	26124

Q251	150mg MgSO4, 50mg PSA, 50mg C18	AOAC 2007.1	100-pk.	26125

Q253	150mg MgSO4, 50mg PSA, 50mg GCB	--	100-pk.	26123

Q252	150mg MgSO4, 50mg PSA, 50mg C18, 50mg GCB	AOAC 2007.1	100-pk.	26219

15mL Centrifuge Tubes for dSPE (clean-up of 6mL extract)
Q350	1200mg MgSO4, 400mg PSA	AOAC 2007.1	50-pk.	26220

Q351	1200mg MgSO4, 400mg PSA, 400mg C18	AOAC 2007.1	50-pk.	26221

Q352	1200mg MgSO4, 400mg PSA, 400mg C18, 400mg GCB	AOAC 2007.1	50-pk.	26222

Q370	900mg MgSO4, 150mg PSA	European EN 15662	50-pk.	26223

Q371	900mg MgSO4, 150mg PSA, 15mg GCB	European EN 15662	50-pk.	26224

Q372	900mg MgSO4, 150mg PSA, 45mg GCB	European EN 15662	50-pk.	26225

Q373	900mg MgSO4, 150mg PSA, 150mg C18	--	50-pk.	26226

Q374	900mg MgSO4, 300mg PSA, 150mg GCB	--	50-pk.	26126

PSA--primary and secondary amine exchange material
GCB--graphitized carbon black
References (not available from Restek)
1. Anastassiades, M., S.J. Lehotay, D. Stajnbaher, F.J. Schenck, Fast and Easy Multiresidue Method Employing Acetonitrile Extraction/Partitioning and “Dispersive Solid-Phase Extraction” for the Determination of Pesticide Residues in Produce, J AOAC International, 2003, vol 86 no 22, pp 412-431.
2. Schenck, F.J., SPE Cleanup and the Analysis of PPB Levels of Pesticides in Fruits and Vegetables. Florida Pesticide Residue Workshop, 2002.
Click thumbnails to see enlarged view.

26214 Q-sep™ QuEChERS Q150, 50mL Centrifuge Tube, Contains 6g MgSO4, 1.5g NaOAc, 50-pk.	26227 Q-sep™ QuEChERS Empty 50mL Centrifuge Tube, 25-pk.	26124 Q-sep™ QuEChERS Q250, 2mL Centrifuge Tube, Contains 150mg Magnesium Sulfate and 50mg PSA, 100-pk.
26125 Q-sep™ QuEChERS Q251, 2mL Centrifuge Tube, Contains 150mg Magnesium Sulfate, 50mg PSA, and 50mg C18, 100-pk.	26123 Q-sep™ QuEChERS Q253, 2mL Centrifuge Tube, Contains 150mg Magnesium Sulfate, 50mg PSA, and 50mg Graphitized GCB, 100-pk.	26126 Q-sep™ QuEChERS Q374, 15mL Centrifuge Tube, Contains 900mg Magnesium Sulfate, 300mg PSA, and 150mg GCB, 50-pk.