氯甲辛三元混合制剂中甲基对硫磷和辛硫磷的分析方法研究

Study on the Analytical Method of Methyl-Parathion and Phoxim in Methyl-Parathion, Phoxim and Cypermethrin Mixed Formulation

介绍了用高效液相色谱一反相色谱法同时测定氯氰菊酯、甲基对硫磷和辛硫磷三元混合制剂中的甲基对硫磷和辛硫磷。采用C8反相柱，流动相为V（甲醇）：V（水）＝70：30，紫外检测波长为254nm或280nm。并与TLC－GC法测定混合制剂中的甲基对硫磷和TLC-溴化法测定混合制剂中的辛硫磷进行了比较。

This paper describes an HPLC method to simultaneously determine methyl-parathion and phoxim in mixed formulation of methyl-parathion, phoxim and cypermethrin. A C, column was used. The mobile phase was V(MeOH): V(H2O) = 70: 30, Methyl-parathion and phoxim were monitored at 254 urn or 280urn by UV detector. The average recoveries were 99. 8% and 99. 9% for methyl-parathion and phoxim respectively. The linearity of detector response vs concentration was calibrated in the concentration ranges from 0. 1746 to 1. 091 g/L for methyl-parathion and from 0. 1927 to 1. 205 g/L for phoxim.