气相色谱法快速测定土壤中9种有机氯农药残留量

Rapid determination of 9 kinds of organochlorine pesticide residues in soil by gas chromatography

目的：建立气相色谱法测定土壤中9种有机氯农药残留量的方法。方法：样品经有机溶剂超声提取，硫酸净化；OV-1701毛细管柱对9种有机氯农药进行分离，电子捕获检测器检测。结果：样品的平均回收率为84．7％～117．1％，RSD为3．36％-7．65％；所测定样品有机氯农药残留量均低于土壤环境质量标准（GB／T14550-93）。结论：本方法快速、简便、准确，可用于土壤中9种有机氯农药的测定。

Objective：To determine 9 organochlorine pesticides （OCPs） in soil by gas chromatography with electron capture detector. Methods： Samples were extracted with organic solvent using supersonic fluid extraction. The extracts were cleaned up by concentrated H2SO4. The column was OV-1701 （ 30m×0.32 mm ×0.32μm）. Results：The average recoveries were 84.7% -117.1% and RSD were 3. 36% - 7.65%. The OCPs of the soil are lower than environmental quality standard for soils （ GB/T 14550-93 ）. Conclusions：This method is rapid, simple and accurate. It can be used to determine organochlorine pesticides in soils .