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对硫磷(O,O-二乙基-O-对硝基苯硫代磷酸酯),是国内外有机磷农药中最大吨位产品之一,其工业品(原油或乳剂)分析方法主要有极谱法、比色法及重氮滴定法等。我们选取比色法和重氮滴定法各自韵优点,避其弱点,并结合曾做过的工作,采用比色-双铂极电流滴定法分析工业对硫磷,效果良好。通过对葛店化工厂(下称葛化)和天津农药厂(下称天农)等厂产品的分析,结果表明,方法简便、易行、可靠。
Parathion (O, O-diethyl-O-p-nitrophenyl phosphorothioate) is one of the largest tonnage products of organophosphorus pesticides at home and abroad, and its industrial products (crude oil or emulsion) Spectral method, colorimetric and diazo titration method. We selected the colorimetric and diazo titration advantages of their respective rhyme, to avoid its weaknesses, combined with the work done, the use of colorimetric - dual platinum current titrimetry analysis of industrial parathion, the effect is good. The results of the analysis of the plant products of Gedian Chemical Plant (hereinafter referred to as Gehua) and Tianjin Pesticide Plant (hereinafter referred to as Tian Nong) show that the method is simple, easy and reliable.