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建立了在同一液相色谱条件下测定混剂中杀扑磷和毒死蜱含量的方法。本方法采用XTerraRP18柱,用甲醇-乙腈-水溶液(体积比63∶15∶22)为流动相,在检测波长230nm下,外标法对试样中的杀扑磷和毒死蜱进行定量分析。分析结果表明,杀扑磷和毒死蜱的线性相关系数分别为0.9998和0.9999;标准偏差分别为0.032和0.048;变异系数分别为0.32%和0.48%;平均回收率分别为98.67%和98.73%。
A method was established for the determination of the contents of Ketofos and chlorpyrifos in the mixture under the same liquid chromatographic conditions. This method uses XTerraRP18 column, methanol-acetonitrile-water (volume ratio of 63:15:22) as the mobile phase at the detection wavelength of 230nm, the external standard method for the determination of pesticides and chlorpyrifos in the sample quantitative analysis. The analytical results showed that the linear correlation coefficients of Ketofos and chlorpyrifos were 0.9998 and 0.9999 respectively; the standard deviations were 0.032 and 0.048; the coefficients of variation were 0.32% and 0.48% respectively; the average recoveries were 98.67% and 98.73% respectively.