反相高效液相色谱法测定饮用水中溴氰菊酯残留

Determination of decamethrin residues in drinking water with reverse phase high performance liquid chromatography

目的：建立反相高效液相色谱法检测饮用水中溴氰菊酯残留。方法：萃取两次后浓缩测定。采用Gemini C18柱,以甲醇＋水=95＋5为流动相进行分离,紫外检测器检测,外标法定量。结果：溴氰菊酯浓度在0～12μg/m l范围内线性关系良好,相关系数r=0.999,最低检测浓度为0.004 mg/L。平均回收率在95.1%～99.4%范围内,相对标准偏差为1.64%～2.42%。结论：方法灵敏度高,实用性强,适合广大基层检测单位日常工作中水中溴氰菊酯含量的检测。

Objective：To develop a method for determination of decamethrin residues in drinking water with reverse phase high performance liquid chromatography.Methods：Concentrated after repeated extraction.Gemini C18 column was used to determine the decamethrin and the mobile phase was methanol＋water=95＋5.The decamethrin was detected by VWD and quantified by external standard method.Results：The linear range was 0～12 μg/ml with correlation coefficient of 0.999.The limits of quantification（LOQs） was 0.004 mg/L,the average recovery of the method was 95.1%～99.4% and the relative standard deviation（RSD） was 1.64%～2.42%.Conclusion：The method is practical,sensitive,and suitable for the determination of decamethrin in drinking water in daily work.