期刊
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
卷 66, 期 1, 页码 88-92出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.sab.2010.12.003
关键词
Dispersive liquid-liquid microextraction (DLLME); Methylmercury; Sodium diethyldithiocarbamate (DDTC); Enrichment factors; HPLC-ICP-MS
类别
资金
- National Natural Science Foundation of China [20605021, 20975099]
- Key Projects in the National Science & Technology Pillar Program during the Eleventh Five-Year Plan Period [2009ZX09308-006-5]
The dispersive liquid-liquid microextraction (DLLME) combined with high performance liquid chromatography-inductively coupled plasma mass spectrometry for the speciation of mercury in water samples was described. Firstly methylmercury (MeHg+) and mercury (Hg2+) were complexed with sodium diethyldithiocarbamate, and then the complexes were extracted into carbon tetrachloride by using DLLME. Under the optimized conditions, the enrichment factors of 138 and 350 for MeHg+ and Hg2+ were obtained from only 5.00 mL sample solution. The detection limits of the analytes (as Hg) were 0.0076 ng mL(-1) for MeHg+ and 0.0014 ng mL(-1) for Hg2+, respectively. The relative standard deviations for ten replicate measurements of 0.5 ng mL(-1) MeHg+ and Hg2+ were 6.9% and 4.4%, respectively. Standard reference material of seawater (GBW(E)080042) was analyzed to verify the accuracy of the method and the results were in good agreement with the certified values. Finally, the developed method was successfully applied for the speciation of mercury in three environmental water samples. (C) 2010 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据