An analytical method for determination of Chlorpyrifos and Atrazine in water was developed.The Chlorpyrifos and Atrazine in water were extracted by petroleum ether and isolated by the method of liquid-liquid partition,by GC-TSD with nitrogen-phosphorus detector(NPD) and CP-SIL 19 fused silica capillary column.The determination result showed that the recovery rates of this method were from 98.7% to 100.5% for Atrazine,from 99.2% to 102.4% for Chlorpyrifos;the relative standard deviation(RSD) was less than 4%...