55279-U
50 mL QuEChERS Extraction Tube Shaker Rack
Horizontal foam shaker rack, holds 7 extraction tubes
Synonym(s):
Supel™ QuE, QuEChERS
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technique(s)
QuEChERS: suitable
application(s)
food and beverages
compatibility
for use with Benchmark Benchmixer™ XL Laboratory Shakers (Cat. Nos. Z765503, Z765511)
General description
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.
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Articles
Dual-layer cartridge achieves efficient SPE clean-up for challenging pesticide residue testing in turmeric and spices.
Related Content
QuEChERS method simplifies sample cleanup for pesticides analysis in food and agricultural samples.
El método QuEChERS simplifica la limpieza de muestras para el análisis de plaguicidas en muestras alimentarias y agrícolas.
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