| DGT富集-乙基化GC-CVAFS测定天然水体中的甲基汞 |
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| 引用本文： | 刘金铃,冯新斌,仇广乐,Clarisse Olivier,闫海鱼,商立海.DGT富集-乙基化GC-CVAFS测定天然水体中的甲基汞[J].地球与环境,2011,39(1):130-135. |
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| 作者姓名： | 刘金铃 冯新斌 仇广乐 Clarisse Olivier 闫海鱼 商立海 |
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| 作者单位： | 刘金铃,LIU Jin-ling(中国科学院地球化学研究所,环境地球化学国家重点实验室,贵阳,550002;中国科学院研究生院,北京10039);冯新斌,仇广乐,闫海鱼,商立海,FENG Xin-bin,QIU Guang-le,YAN Hai-yu,SHANG Li-hai(中国科学院地球化学研究所,环境地球化学国家重点实验室,贵阳,550002);Clarisse Olivier,Clarisse Olivier(Trent University,Chemistry Department,1600 West Bank Dr,Peterborough,ON,Canada K9J7B8) |
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| 摘 要： | 利用薄膜扩散技术(DGT)原位富集天然水体中的甲基汞,溶剂洗脱后进入水相连行乙基化反应,与气相色谱(GC)联用,冷原子荧光光谱法(CVAFS)测定.实验结果显示,26"(3条件下在超纯水中放置24 h,典型DGT单元的最低检出限为0.014 ng/L;延长放置时闻或者减少扩散层厚度,可以得到更低的检测限.相对标准偏差＜...
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| 关 键 词： | 天然水体 甲基汞 薄膜扩散技术 气相色谱法-冷原子荧光联用 |
Determination of Methylmercury in nature water by DGT-Ethylation-GC-CVAFS |
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| LIU Jin-ling,FENG Xin-bin,QIU Guang-le,Clarisse Olivier,YAN Hai-yu,SHANG Li-hai.Determination of Methylmercury in nature water by DGT-Ethylation-GC-CVAFS[J].Earth and Environment,2011,39(1):130-135. |
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| Authors: | LIU Jin-ling FENG Xin-bin QIU Guang-le Clarisse Olivier YAN Hai-yu SHANG Li-hai |
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| Institution: | LIU Jin-ling1,2,FENG Xin-bin1,QIU Guang-le1,CLARISSE Olivier3,YAN Hai-yu1,SHANG Li-hai1(1.State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550002,China,2.Graduate School,Beijing 10039,3.Trent University,Chemistry Department,1600 West Bank Dr,Peterborough,ON,Canada K9J7B8) |
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| Abstract: | The diffusive gradient in thin films technique(DGT) was developed for measuring methylmercury in nature water by aqueous-phase ethylation reaction with sodium tetraethylborate,gas chromatographic separation,and cold vapor atomic fluorescence spectrometric detection.This technique is extremely sensitive and relatively efficient because of its in situ pre-concentration.The detection limit of the overall method is 0.014 ng/L,when deploying a typical DGT device in ultra-pure water for 24 hours,at 26℃.Even low methylmercury concentrations could be determined using longer deployment times or thinner diffusive gel layer.The relative standard deviation is lower than 10%.This method is an effective in-situ method for trace/ultra trace methylmercury.And it is simple,low detection limited and accuracy. |
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| Keywords: | Nature water Methylmercury DGT GC-CVAFS |
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