Gas Chromatographic Analysis of Residual Pesticides in Food. IV. A Rapid Screening System for Organophosphorus Pesticides

Abstract

A rapid and simple screening method was devised for eight organophosphorus pesticides residue in vegetables using a gas chromatograph equipped with a flame photometric detector (FPD). The amount of insecticides in a sample solution was estimated from the log-log plot of peak area response vs. pesticide concentration. For identification, three parameters were found useful ; retention time, comparison of peak area response at P and S mode, and response ratio, R^1/m_s/R^1/n_p. In addition, some discussions are made on mechanical system for this purpose.