气相色谱法同时检测生活饮用水中的27种有机磷农药残留

Simultaneous determination of 27 organophosphorus pesticide residues in drinking water by gas chromatography

目的：建立气相色谱法同时测定饮用水中的27种有机磷农药残留。方法：水中的有机磷农药经液-液萃取浓缩后,用CP-Sil 24 CB毛细管柱分离、脉冲火焰光度检测器（PFPD）进行检测。结果：27种有机磷农药在0.20～10.0μg/ml范围内有较好的线性,相关系数均大于0.99,检出限为0.03～0.31μg/L,水样的加标回收率为70.5%～103.0%,RSD为3.5%～9.7%。结论：所建立的分析方法简便、快速、准确,可同时测定饮用水中的27种有机磷农药残留。

Objective：To establish a method for simultaneous determination of 27 organophosphorus pesticide residues in drinking water by gas chromatography.Methods：The organophosphorus pesticides in drinking water were concentrated after liquid-liquid extraction,then separated by CP-Sil 24 CB capillary column and determined by pulsed flame photometric detector（PFPD）.Results：27 organophosphorus pesticides gave a good linearity in the range of 0.20~10.0 μg/ml（r0.99）.The detection limits were 0.03~0.31 μg/L.The recoveries for the spiked samples ranged from 70.5% to 103.0% and the relative standard deviations（RSD） 3.5%~9.7%.Conclusion：The method is simple,rapid,accurate and can be applied to the simultaneous determination of 27 organophosphorus pesticide residues in drinking water.