气相色谱法测定城市自来水中有机氯农药的残留  

Determination of organochlorine Pesticides in Tap Water in City by GAS Chromatography

作　　者：曲仪 李树石 何英男 

机构地区：[1]大连开发区自来水公司,大连116600

出　　处：《环境保护科学》2005年第1期47-49,共3页Environmental Protection Science

摘　　要：水中有机氯农药经有机溶剂如环已烷的萃取浓缩后,由高纯氮气载入色谱柱进行分离,载有有机氯农药的氮气进入电子捕获检测器ECD后,其出峰顺序为①α-HCH②γ-HCH③β-HCH④δ-HCH⑤P,P-DDE⑥O,P-DDT⑦P,P-DDD⑧P,P-DDT。用该方法测试的结果表明,在去离子水中添加10ug/L级待测物时,各种待测物的回收率为9350%~9906%(3次平均值),相对标准偏差(RSD)为6%~18%(7次测定平均值)。最低检出量为005ug/L^033ug/L。文中阐述的方法改进了现有的GB5750-85方法中的萃取方法,取得了令人满意的结果。本文也给出了几种常见有机氯农药最小检出量,并在检测水源水的实际工作中得到应用。Organochlorine Pesticides in water are separated through the Chromatography Column after extraction by organochlorine solution such as cyclohexane.When the N_2 carrying organochlorine pesticides get in Electron Capture detection,the turn of appearance peak is:①α-HCH②γ-HCH③β-HCH④δ-HCH⑤P,P-DDE⑥O,P-DDT⑦P,P-DDD⑧P,P-DDT The test results showed that with this method satisfactory recoveries 93.5%～99.06%,relative standard deviation(RSD)6%～18% and detection limits 0.05ug/L～0.33ug/L could be obtained.The methods in the article have improved extraction methods in currently national standard GB5750-85,also we have got the limits of several general organochlorine pesticides,and then applied this method in determinate source water.

关 键 词：有机氯农药 常见 检出量 DDD 气相色谱法 城市自来水 DDT Γ-HCH 电子捕获检测器 萃取方法 

分 类 号：X592[环境科学与工程—环境工程] R123[医药卫生—环境卫生学]