作者：许秀艳1, 徐晟2, 梁宵1, 邢冠华1, 滕恩江1
作者单位：1. 中国环境监测总站, 北京 100012;
2. 苏州科技学院, 江苏 苏州 215000
关键词：水; 有机氯农药; 双柱; 双ECD; 液-液萃取
摘要：
建立了双柱、双ECD法测定水中16种有机氯农药的方法, 实验考察了萃取次数、萃取溶剂体积、浓缩方式对测定结果的影响。当水样体积为200 mL时, 方法检出限为3.0~13.4 ng/L, 所得各组分的相对标准偏差为2.4%~12%, 平均回收率为73.7%~120%。采用双柱、双ECD检测器, 在一次进样的条件下, 可以同时收集两套数据供定性和定量分析, 具有定性更准确、定量更精确的特点。
Determination of 16 species of organochlorine pestcides in water
XU Xiu-yan1, XU Sheng2, LIANG Xiao1, XING Guan-hua1, TENG En-jiang1
1. China National Environmental Monitoring Centre, Benjing 100012, China;
2. Suzhou University of Science and Technology, Suzhou 215000, China
Abstract: A new method was established for determining 16 species of organochlorine pestcides in water by dual-column and dual-μECD gas chromatography. The influencing factors such as extracting times, extracting solvent volume and concentration mode were discussed. When the sample volume was 200 mL, the method detection limits were from 3.0 ng/L to 13.4 ng/L, the relative standard deviations were between 2.4% and 12%, and the average recoveries ranged from 73.7% to 120%. Two group of data for qualitative and quantitative analysis of organochlorine pestcides were obtained by one injection of sample, so this method is qualitatively more accurate and quantitatively more exact.
Keywords: water; organochlorine pestcides; dual-column; dual-μECD; liquid-liquid extration
2011, 37(4): 28-31 收稿日期: 2010-8-31;收到修改稿日期: 2010-12-23
基金项目: 国家水体污染控制与治理科技重大专项(2009ZX07527-001)
作者简介: 许秀艳(1977-),女,山东乳山市人,博士,主要从事环境监测技术及分析方法研究。
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