固相萃取/气相色谱/质谱法测定饮用水中毒死蜱

Determination of Chlorpyrifos in Drinking Water by Solid-phase Extraction and Gas Chromatography-Mass Spectrometry

建立了检测饮用水中毒死蜱的固相萃取/气相色谱/质谱法,该方法对毒死蜱的测定下限可达0.000 6 mg/L,远低于国标法的0.002 mg/L。线性范围为0.5～5.0 mg/L,样品平均加标回收率在74.86%～86.14%之间,测定结果的相对标准偏差<5.4%。该方法简单、灵敏度高、准确、重现性好,可用于饮用水中痕量毒死蜱的测定。

An analytical method for determination of chlorpyrifos in drinking water by solid-phase extraction （SPE） and GC-MS was developed. The detection limit of chlorpyrifos was 0. 000 6 rag/L, which was much lower than the national standard method of 0. 002 mg/L. The linear range was 0.5 to 5.0 mg/L, the spiked recovery was 74.86% to 86.14% , and the relative standard deviation （RSD） was less than 5.4%. The method is simple, sensitive ruination of trace chlorpyrifos in water. , accurate and reproducible, and it is suitable for deter-