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目的水对我们的生命起着重要的作用,水中污染物的检测对于我们饮用水安全起着关键作用,有机磷农药的污染对水体的污染及对人体健康的影响不容忽视,为了快速、准确、方便的检测水中有机磷的含量,本文建立了自动进样气相色谱法同时检测水中有机磷农药的方法。方法采用液液萃取方法提取水中有机磷农药,在选定的条件下,用DB1701毛细管柱进行分离,FPD检测器进行检测。结果 7种有机磷在选定的条件下分离效果好,曲线相关系数在0.998 4~0.999 7之间,方法检出限(3S/N)为0.05~0.09μg/L,加标回收率为90.4%~98.8%,RSD为1.45%~2.74%。结论该方法具有良好的重复性和准确性,检测限低,满足《生活饮用水卫生标准》中有机磷指标限值的要求。
The purpose of water plays an important role in our lives, the detection of pollutants in water play a key role in the safety of our drinking water pollution of organophosphorus pesticides on water pollution and human health can not be ignored, in order to quickly and accurately, Convenient to detect the content of organic phosphorus in water, this paper established a method of automatic sample gas chromatography simultaneous detection of organophosphorus pesticides in water. Methods Liquid-liquid extraction was used to extract organophosphorus pesticides in water. Under the selected conditions, the samples were separated by capillary column DB1701 and detected by FPD detector. Results The results showed that the separation efficiency of the seven organophosphates was good under the selected conditions. The correlation coefficient of the curves was between 0.998 4 and 0.999 7, and the detection limit (3S / N) was 0.05 ~ 0.09 μg / L with the recovery of 90.4 % ~ 98.8%, RSD 1.45% ~ 2.74%. Conclusion The method has good repeatability and accuracy, low detection limit, to meet the “drinking water health standards” in the limits of organic phosphorus requirements.