气相色谱法测定水中七种有机磷农药研究

水中微量有机磷农药经二氯甲烷萃取、净化、凝胶净化色谱(GPC)浓缩,用带火焰光度检测器(FPD)的毛细管柱气相色谱仪测定.实验结果表明:七种有机磷农药曲线线性良好,相关系数可达0.999以上;检出限能够满足《地表水环境质量标准》限值要求;加标回收率范围为81.4%~92.4%,相对标准偏差范围为2.5%~7.3%,相对误差范围为1.9%~8.5%.可以同时测定《地表水环境质量标准》中规定的7种有机磷农药,提高工作效率.

Measurement of Seven Organic Phosphorous Pesticides in Water with Gas Chromatography

The water that contains phosphorous was extracted with dichloromethane purified and concentrated by GPC, and then detected with FPD by capillary column gas chromatography. The experimental results show:seven organic phosphorous pesti-cides have good curve linearity and the correlation coefficient can reach above 0. 999. The detection limit can meet environmental quality standards for surface water; The recovery range of 81. 4% ~92. 4%, the relative standard deviation range of 2. 5% ~7. 3%,and the relative error range of 1. 9% ~8. 5%. The method can determinate seven organic phosphorous pesticides of envi-ronmental quality standards for surface water at the same time, which can improve working efficiency.