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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/Sodium Bicarbonate Tube, pk of 50
Supelco
Supel QuE, Acetate Tube, pk of 50, AOAC® 2007.01
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, Empty Centrifuge Tube with Lid, centrifuge tube volume 50 mL, pk of 50, suitable for EN 15662:2008 per BS
Supelco
Supel QuE, PSA Tube, pk of 50, AOAC® 2007.01
Supelco
Supel QuE, PSA Tube, pack of 100, AOAC® 2007.01
Supelco
Supel QuE, PSA/C18/ENVI-Carb Tube, pk of 50, AOAC® 2007.01
Supelco
Supel QuE, PSA/C18 Tube, pack of 100, AOAC® 2007.01
Supelco
Supel QuE, PSA/C18 Tube, pk of 50, AOAC® 2007.01
Supelco
Supel QuE, Non-Buffered Tube 2, pk of 50
Supelco
Supel QuE, Non-Buffered Tube 1, pk of 50
Supelco
Supel QuE, Z-Sep with MgSO4 Tube, centrifuge tube volume 2 mL, pack of 100 ea
Supelco
Supel QuE, Z-Sep+ Tube, pk of 50, centrifuge tube volume 15 mL , Shaker Compatible
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, Z-Sep+ with MgSO4 Tube, pk of 50, centrifuge tube volume 15 mL , Shaker Compatible
Supelco
Supel QuE, Z-Sep/C18 Tube, pk of 50, centrifuge tube volume 15 mL , Shaker Compatible
Supelco
Supel QuE, PSA/C18/ENVI-Carb Tube, pack of 100, AOAC® 2007.01
Supelco
Supel QuE, Z-Sep/C18 Tube, centrifuge tube volume 2 mL, pack of 100
Supelco
Supel QuE, Z-Sep+ Bulk, pkg of 20 g
Supelco
Supel QuE, Z-Sep+ Tube, centrifuge tube volume 12 mL, pack of 50 ea
Supelco
Ethiofencarb-sulfone, certified reference material, TraceCERT®
Supelco
Supel QuE, Z-Sep Bulk
Supelco
Supel QuE, Z-Sep+ with MgSO4 Tube, centrifuge tube volume 2 mL, pack of 100 ea
Supelco
Supel QuE, Z-Sep/C18 Tube, centrifuge tube volume 12 mL, pack of 50 ea
Supelco
Supel QuE, Z-Sep Tube, centrifuge tube volume 2 mL, pack of 100 ea
Supelco
Supel QuE, Z-Sep+ with MgSO4 Tube, centrifuge tube volume 12 mL, pack of 50 ea
Supelco
Supel QuE, Z-Sep Tube, centrifuge tube volume 12 mL, pack of 50 ea
Supelco
Supel QuE, Z-Sep+ Tube, centrifuge tube volume 2 mL, pack of 100 ea