毛细管气相色谱法测定食品中的六六六、滴滴涕

Determination of HCH and DDT Residues in Food by Capillary Gas Chromatography

[目的]建立食品中六六六、滴滴涕的毛细管气相色谱测定法。[方法]根据食品种类，用不同溶剂提取、净化，经石英毛细管气相色谱柱分离，电子捕获检测器检测，样品与标准品的保留时间、峰面积比较进行定性、定量。[结果]方法定量测定的线性相关系数（r）均≥0．999，回收率范围为90％～103％，相对标准偏差（RSD）为1．4％～9．7％。[结论]方法使用毛细管柱分析样品快速，分离效果好，灵敏度高，结果稳定，线性关系好。

[Objective]To develop a method for the determination of HCH and DDT residues in food by capillary gas chromatography （GC）. [Methods]According to the kinds of different foods,the HCH and DDT were extracted and purified with different solvents,separated with quartz capillary GC column,and detected with electro-traped detector. The re- taintion time and peak area were compared between the sample and the standard to make qualitative and quantitative analysis. [Results]This method had good relativity of linearity（ r ≥0. 999） ,the average recoveries of samples were 90 %-103%, the relative standard deviation ranged from 1.4% to ,9. 7 %. [Conclusion]The method of HCH and DDT determination in food by capillary GC was rapid, and it had good extracting effect,high sensitivity and stability,good relativity of linearity.