Abstract:

A novel method has been developed to determine dichlorvos residue in dried salted fish using capillary gas chromatography (GC). Samples were extracted by accelerated solvent extraction and cleaned up by gel permeation chromatography. The eluate was condensed and injected into a gas chromatograph equipped with a flame photometric detector (FPD) for the quantification of dichlorvos by external standard method. Recovery rates for dichlorvos in 9 varieties of blank dried salted fish samples spiked at 2.5 × 10-2 mg/kg and 10.0 × 10-2 mg/kg ranged from 74.4% to 96.8%. The limit of detection (LOD) of this method was 5.0×10-4 mg/kg. This method is accurate, highly automated and presents high cleanup effectiveness. It can meet the requirements of pesticide residue analysis.

Key words: accelerated solvent extraction, gel permeation chromatography, gas chromatography, dichlorvos, dried salted fish