Rapid Determination of 18 Pesticides Residues in Vegetables by QuEChERS Cleanup and GC-MS

doi:10.7506/spkx1002-6630-201310048

Abstract

Abstract:

A simple and rapid method was developed to determine 18 pesticide residues in vegetables by GC-MS.
Pesticides were extracted with acetonitrile and cleaned up by dispersive solid phase extraction using primary secondary
amine and analyzed by GC-MS under selective ion monitoring mode. Under the optimal chromatographic conditions, a good
linear relationship was obtained in the concentration range of 0.036 to 0.36mg/kg. Average recoveries of the pesticides in
blank matrix spiked at 0.05 mg/kg and 0.1 mg/kg ranged from 75% to 117%. The limits of detection for 18 pesticides were
in the range of 1.0 to 14.8 μg/kg. This method is simple and reproducible and can offer a reliable analytical approach for
determining pesticide multi-residues in vegetables.

Key words: dispersive solid-phase extraction, gas chromatography-mass spectrometry (GC-MS), vegetables, pesticide multi-residue

CLC Number:

O657

References

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