Residues of organochlorinated pesticides in water from the industrial and urban sewage in Beijing

Methods for analyzing the residues of the organochlorinated pesticides(OCPs) in waters by using solid phase extraction(HLB-cartridge) and gas-chromatography/electron-capture detector(GC/ECD) was established.This paper analyzed the residual Levels of organochlorinated pesticides in water from seven kinds of important contaminative sewage such as urban sewage,chemical industrial sewage,petrochemical chemical plant,and so on.The result indicated that there were γ-HCH,β-HCH and p,p'-DDT and α-HCH,δ-HCH,EndosulfanⅠ and p,p'-DDE and Aldine and Endrin which were detected in the industrial and urban sewage water.Their frequency of check-up were respectively 90%,60%,50%,46%,26%,8%,6%,2% and 2%.It is obviously that the primary residual OCPs were γ-HCH,β-HCH and p,p'-DDT.The concentration of them were 0.20～76.40ng·L~(-1).By the analytical method,the recoveries for standard spiking environmental water were 60.93%～141.50%,the Lowest detected Limit of the method were 0.27～2.90ng·L~(-1).