タマネギ中の有機リン農薬の分析法

概要

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Organosulfides in aromatic vegetables such as onion, welsh-onion, leek, garlic and shallot strongly interfere with the analysis of residual organophosphorus pesticides by flame photometric detector-gas liquid chromatography (FPD-GLC).To overcome this problem, the removal of the interfering substances in onion was investigated by the use of column chromatography.The method consists of the following procedures: extraction with acetonitrile, concentration of the extract and cleanup on an Amberlite XAD-8 column, and FPD-GLC.By these procedures, sulfides were efficiently removed to allow good recovery of organophosphorus pesticides added to onion samples, as follows: Diadinon 76%, Malathion 81%, Dichlorvos 82%, Phenthoate 82%, Dimethoate 83%, EPN 85%, Parathion 85%, Phosalon 90%, Chlorpyriphos 92%, Fenitrothion 99%, Fenthion 105%.The proposed method can also be successfully applied for the analysis of residual organophosphorus pesticides in welsh-onion and leek.
公益社団法人日本食品衛生学会の論文