Abstract
A method was developed for the simultaneous analysis of organophosphorus pesticides including acephate in water.
A water sample was shaken with 20% hexane in dichloromethane. Then anhydrous sodium sulfate was added in the sample to dehydrate until the water layer disappeared. The organic layer containing pesticides was collected, evaporated and then dissolved in acetone. The extract was determined by gas chromatography. Thirteen kinds of pesticides were separated by using capillary column TC-1701, and linearities of calibration curves of them were satisfactory. Recoveries of pesticides added to water samples were from 93.6% to 106.2% except dichlorvos (from 52.3% to 79.9%) and ethylthiometon (from 64.4% to 84.3%).
