Studies on Analysis of Pesticide Residues in Foods (XVI) Analytical Method of Residues of Nine Organophosphorus Pesticides including Dichlorvos and Disulfoton in Vegetables

• Published in: Food Hygiene and Safety Science (Shokuhin Eiseigaku Zasshi) Vol. 15; no. 5; pp. 337 - 341_1
• Main Authors: INOUE, Yasuyuki, FUKUHARA, Katsuharu, TAKEDA, Mitsuharu
• Format: Journal Article
• Language: English; Japanese
• Published: Japanese Society for Food Hygiene and Safety 1974
• ISSN: 0015-6426; 1882-1006
• DOI: 10.3358/shokueishi.15.337

Nine kinds of organophosphorus pesticides including dichlorvos and disulfoton were investigated to establish a method of determination for these pesticides in agricultural products by gas chromatography. On the bases of the recovery of disulfoton in concentration step by a Kuderna-Danish concentrator below 50°C, use of benzene or n-hexane as extracting solvents was desirable but dichloromethane ethyl ether and ethyl acetate were unsuitable for this purpose. The recoveries of the pestisides in acetone-water mixture extracts by the extraction with benzene or n-hexane were fine except dichlorvos, but dichlorvos was extracted with only benzene. The method of determination for 9 kinds of organophosphorus pesticides including dichlorvos and disulfoton designed on the base of the results of 8 kinds of agricultural products. It was shown that the recoveries of the organophosphorus pesticides added to the sample homogenates were between 62.0 and 96.3%.