Analysis of Disulfoton and Trichlorfon in Agricultural Products by FPD-GC

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A simple and rapid determination method for disulfoton (ethylthiomethon), its oxidative metabolites (disulfotonsulfon, dimetl onthiol, dimethonthiolsulfon) and trichlorfon in agricultural products was established.Those pesticides were extracted from samples with acetone, purified by coagulation, reextracted with dichloromethane into the organic layer and determined by GC. After trichlorfon was completely decomposed to dimethylphosphite (DMP: thermal decomposition product) on GC, disulfoton, its metabolites and DMP were separately determined by FPD-GC with a capillary column.Surveillance of these pesticides in 51 agricultural products which were purchased in Osaka on June, 1989, was carried out. Neither trichlorfon nor disulfoton and its metabolites were detected. Recoveries of trichlorfon and disulfoton added to the samples at 0.1ppm ranged from 60.4 to 93.5% and the detection limit of the five pesticides was 0.001ppm in samples by the proposed method.
公益社団法人日本食品衛生学会の論文