Gas Chromatographic Determination of Organochlorine and Organophosphate Pesticides in Surface Water Samples with Solid Phase Disk Extraction

The organochlorine and organophosphate pesticide residues in water samples were extracted by solid phase extraction disks and determined by GC-μECD and GC-FPD. The results show that the average recoveries of 16 organochlorine pesticides for 1 L water samples were 64.7%～102% with precision of 2.9%～15%RSD (n=6). The average recoveries of 13 organophosphate pesticides for 1 L water samples were 65.9%～104% with precision of 1.7%～17%RSD (n=6). The method can be applied to the analysis of organochlorine and organophosphate pesticide residues in surface water samples with the advantages of rapidity, high sensitivity and low pollution.