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

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.