作者：陈烨, 许秀艳, 吕怡兵, 滕恩江, 邢冠华, 王超
作者单位：中国环境监测总站, 北京 100012
关键词：有机磷农药; 固相萃取; 气相色谱; 双柱; 水
摘要：
针对单一气相色谱柱定性分析易出现假阳性误判的情况,采用固相萃取-气相色谱双柱技术测定环境水体中多种有机磷农药的残留量.水样中的有机磷农药通过HLB固相萃取小柱富集,经洗脱浓缩后,用DB-35MS和HP-5毛细管气相色谱柱、火焰光度检测器测定.方法的平均加标回收率为86.1%~118%,相对标准偏差为3.2%~6.8%,最低检出限为20~40 ng/L,可满足环境水体中痕量有机磷农药残留的分析需要.
Determination of multiple organophosphorous pesticide residues in water by dual-column gas chromatography coupled with solid phase extraction
CHEN Ye, XU Xiu-yan, LÜ Yi-bing, TENG En-jiang, XING Guan-hua, WANG Chao
China National Environmental Monitoring Centre, Beijing 100012, China
Abstract: To avoid the case of false positive when analyzing by single column, the dual-column gas chromatography coupled with solid phase extraction was applied to the multi-residue determination of organophosphorous pesticides in environmental water. The organophosphorous pesticides were extracted from water with HLB solid phase extraction cartridges and then eluted. After concentrated, the eluents were detected by GC-FPD with DB-35MS and HP-5 capillary columns. The average recoveries of 5 replicates for analytes ranged from 86.1% to 118%, with relative standard deviations between 3.2% and 6.8%. And the method detection limits were within the range of 20 ng/L to 40 ng/L. The results showed that the proposed method is suitable for the determination of trace amounts of multiple organophosphorous pesticide residues in environmental water.
Keywords: organophosphorous pesticides; solid-phase extraction; gas chromatography; dual-column; water
2011, 37(5): 53-55 收稿日期: 2010-11-19;收到修改稿日期: 2011-2-29
基金项目: 国家水体污染控制与治理科技重大专项子课题(2009ZX07527-001)
作者简介: 陈烨(1983-), 女, 硕士, 主要从事环境监测分析技术及方法研究工作.
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