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  • Determination of carbamates in edible vegetable oils by ultra-high performance liquid chromatography-tandem mass spectrometry using a new clean-up based on zirconia for QuEChERS methodology.

Determination of carbamates in edible vegetable oils by ultra-high performance liquid chromatography-tandem mass spectrometry using a new clean-up based on zirconia for QuEChERS methodology.

Talanta (2014-07-26)
David Moreno-González, José F Huertas-Pérez, Ana M García-Campaña, Laura Gámiz-Gracia
ABSTRACT

In this study a fast, selective and sensitive multiresidue method based on QuEChERS methodology has been evaluated and validated for the determination of carbamate pesticides, in edible vegetable oils by UHPLC-MS/MS. A new clean-up sorbent, Supel(TM) QuE Z-Sep(+), has been successfully applied in vegetable oil extracts. Z-Sep(+) was compared with other sorbents (i.e. mixture of C18 and PSA) previously used for dispersive solid phase extraction of these matrices, reducing more effectively matrix effects without a significant decrease of analyte recoveries. Matrix effect was studied in different matrices (extra-virgin olive, sunflower, maize, linseed and sesame oil) being ≤│30│% for most of the studied pesticides. Under optimum conditions, recoveries ranged from 74% to 101%, with relative standard deviations lower than 10%. Limits of quantification ranged from 0.09 to 2.0 µg kg(-1), allowing their determination at the low concentration levels demanding by current legislation.

MATERIALS
Product Number
Brand
Product Description

Supelco
Supel QuE, Citrate Extraction Tube, pk of 50, suitable for EN 15662
Supelco
Supel QuE, PSA Tube, pk of 50, suitable for EN 15662:2008 per BS
Supelco
Supel QuE, Acetate Tube, pk of 50, AOAC® 2007.01
Supelco
Supel QuE, Z-Sep/C18 Tube, pk of 50, centrifuge tube volume 15 mL , Shaker Compatible
Supelco
Supel QuE, PSA/C18 Tube, pack of 100, AOAC® 2007.01
Supelco
Supel QuE, PSA/C18/ENVI-Carb Tube, pack of 100, AOAC® 2007.01
Supelco
Supel QuE, Z-Sep+ Tube, pk of 50, centrifuge tube volume 15 mL , Shaker Compatible
Supelco
Supel QuE, Z-Sep Bulk
Supelco
Supel QuE, Non-Buffered Tube 2, pk of 50, suitable for PFAS testing
Supelco
Supel QuE, PSA/C18 Tube (Shaker Compatible), pk of 50, suitable for EN 15662:2008 per BS, centrifuge tube volume 15 mL , Shaker Compatible
Supelco
Ethiofencarb-sulfone, certified reference material, TraceCERT®, Manufactured by: Sigma-Aldrich Production GmbH, Switzerland
Supelco
Supel QuE, Verde Tube, centrifuge tube volume 2 mL, pack of 100 ea
Supelco
Supel QuE, Non-Buffered Tube 1, pk of 50
Supelco
Supel QuE, Z-Sep/C18 Tube, centrifuge tube volume 2 mL, pack of 100
Supelco
Supel QuE, PSA Tube, pack of 100, AOAC® 2007.01
Supelco
Supel QuE, Citrate/Sodium Bicarbonate Tube, pk of 50
Supelco
Supel QuE, Z-Sep+ Bulk, pkg of 20 g
Supelco
Supel QuE, PSA/ENVI-Carb Tube 1, pk of 50, suitable for EN 15662:2008 per BS, centrifuge tube volume 15 mL , Shaker Compatible
Supelco
Supel QuE, PSA/ENVI-Carb Tube 2, pk of 50, suitable for EN 15662:2008 per BS, centrifuge tube volume 15 mL , Shaker Compatible
Supelco
Supel QuE, PSA Tube, pk of 50, AOAC® 2007.01, centrifuge tube volume 15 mL , Shaker Compatible
Supelco
Supel QuE, PSA/C18 Tube, pk of 50, AOAC® 2007.01, centrifuge tube volume 15 mL , Shaker Compatible
Supelco
Supel QuE, PSA/ENVI-Carb (EN) Cleanup Tube 2, pack of 100, suitable for EN 15662:2008 per BS
Supelco
Supel QuE, PSA/ENVI-Carb (EN) Cleanup Tube 1, pack of 100, suitable for EN 15662:2008 per BS
Supelco
Supel QuE, Z-Sep+ Tube, centrifuge tube volume 2 mL, pack of 100 ea
Supelco
Supel QuE, Z-Sep Tube, centrifuge tube volume 2 mL, pack of 100 ea
Supelco
Supel QuE, PSA (EN) Cleanup Tube, pack of 100, suitable for EN 15662:2008 per BS
Supelco
Supel QuE, PSA/C18 (EN) Cleanup Tube, pack of 100, suitable for EN 15662:2008 per BS
Supelco
Supel QuE, Z-Sep Tube, pk of 50, centrifuge tube volume 15 mL , Shaker Compatible
Supelco
Supel QuE, Z-Sep+ with MgSO4 Tube, pk of 50, centrifuge tube volume 15 mL , Shaker Compatible
Supelco
Supel QuE, PSA/C18/ENVI-Carb Tube, pk of 50, AOAC® 2007.01, centrifuge tube volume 15 mL , Shaker Compatible