Analysis of Endosulfan and Its Metabolites in Crops with GC-ECD and GC/MS

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  • GC-ECD及びGC/MSによる農作物中のエンドスルファン及びその代謝物の分析
  • GC-ECD オヨビ GC MS ニヨル ノウサクブツチュウ ノ エンドスルフ

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Endosulfan (ES), a widely used organochlorine pesticide, is oxidized to ES-sulfate in the environment. In addition, ES is metabolized to ES-sulfate, ES-alcohol, ES-ether, ES-lactone and other products in plants.<br>A simple and rapid method was developed for the simultaneous determination of ES and its metabolites, including α-ES, β-ES, ES-sulfate, ES-alcohol, ES-ether and ES-lactone, with GC. In this method ES and its metabolites are eluted in three fractions from a silica gel column. The metabolites are identified by GC/MS.<br>The developed method was applied to crops in which α-ES, β-ES and ES-sulfate had been detected by use of an established method. These compounds were also detected by the new method, together with ES-ether, ES-lactone and ES-alcohol in some samples.<br>The recoveries of ES and its metabolites fortified at the levels of 0.1μg/g and 1μg/g were more than 90%. The detection limits of α-ES, β-ES, ES-ether and ES-lactone were 0.25ng/g, and those of ES-sulfate and ES-alcohol were 0.5ng/g, respectively.

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