Determination of Organophosphorous Pesticide Residues in Aquatic Products by Gas Chromatography

Established an analytical method for the determination of 8 organophosphorous pesticide residues in aquatic products by GC/FPD.The sample was extracted by acetonitrile,purified by ENVI-C18 and PSA solid-phase extraction,cartridges using acetone/n-hexane(1:1,V:V) as eluent.The eluent was blown to dryness under a stream of nitrogen,was then injected into the GC system to quantitative analysis.Calibration curves of high correlation were for 8 organophosphorous pesticide residues in a range between 0.050 mg/L and 1.00 mg/L,detection limits were in the range of 1.8 μg/kg～2.5 μg/kg,RSD of spiked replicate samples ranged from 1.1%～5.7% and the recovery rates were from 69.8%～116%.