Residues of the Organic Nitrogen and Organophosphorus Pesticide in Water from the Industrial and Urban Sewage in Beijing

Methods for analyzing the residues of organic nitrogen pesticide and organophosphorus pesticide in waters by using solid phase extraction( 18C-cartirdge) and gas-chromatography/nitrogen-phosphorus detection(GC/NPD) were established, and the rate of recovery and sensitivity to the methods were appraised.This paper analyzed the residual levels of ONPs,OPPs in water from seven kinds of important contaminative sewage such as urban sewage,chemical industry sewage,petrochemical sewage and so on.The result indicated that there were four kinds of the organic nitrogen pesticide and organophosphorus pesticide(Malathion carbofos,atrazine,parathion and acetochlor) which were detected in the industrial and urban sewage water.Their frequency of check-up was under 8%.Their concentrations were between 0.11~4.02 μg·L -1.By the analytical method,the recoveries for standard spiking environmental water were 83.9%~94.7% except metribuzin(30%).