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题名: COMPARISON OF MODIFIERS FOR MERCURY SPECIATION IN WATER BY SOLID PHASE EXTRACTION AND HIGH PERFORMANCE LIQUID CHROMATOGRAPHY-ATOMIC FLUORESCENCE SPECTROMETRY
作者: Xiong, Xiong1, 2; Qi, Xiaoting3; Liu, Jiantong1; Wang, Juan3; Wu, Chenxi1
关键词: 2-mercaptoethanol ; Diethyldithiocarbamate ; High-performance liquid chromatography atomic fluorescence spectrometry ; HPLC-AFS ; Mercury species ; SPE
刊名: ANALYTICAL LETTERS
发表日期: 2014
DOI: 10.1080/00032719.2014.910667
卷: 47, 期:14, 页:2417-2430
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Chemistry, Analytical
研究领域[WOS]: Chemistry
英文摘要: Diethyldithiocarbamate and 2-mercaptoethanol modifiers were compared for the preconcentration of mercury species in water by C-18 solid phase extraction (SPE). The recovery values of mercury species were determined by high performance liquid chromatography-atomic fluorescence spectrometry. The eluent type, pH, chloride ion concentration, humic acid concentration, and storage time were evaluated to compare the preconcentration efficiency. L-cysteine was employed to elute the mercury compounds. Less eluent was needed for 2-mercaptoethanol modified SPE than for diethyldithiocarbamate modified SPE at an L-cysteine concentration of 0.12%. Diethyldithiocarbamate modified SPE could be used over a wider pH range and higher humic acid concentrations, whereas 2-mercaptoethanol modified SPE was less affected by the chloride concentration. Both modified SPE systems stored mercury species for 5 days, but diethyldithiocarbamate modified SPE could be stored longer. Diethyldithiocarbamate SPE provided limits of detections of 3.5, 2.5, and 4 ng.L-1 and average recoveries of 90.78 +/- 3.37%, 96.79 +/- 5.12%, and 84.88 +/- 5.37% for mercury(II), methylmercury, and ethylmercury, respectively. The relative standard deviation was less 6.5%. For 2-mercaptoethanol modified SPE, the limits of detection were 1.4, 1, and 1.6 ng.L-1 and the recoveries were of 87.66 +/- 8.45%, 86.70 +/- 2.61%, and 91.31 +/- 6.98% for mercury(II), methylmercury, and ethylmercury, respectively, with a relative standard deviation below 9.7%. Water should be characterized for its physical and chemical characteristics before mercury preconcentration to choose the most suitable method.
关键词[WOS]: GAS-CHROMATOGRAPHY ; MASS SPECTROMETRY ; ABSORPTION-SPECTROMETRY ; DITHIOCARBAMATE RESIN ; METHYL MERCURY ; NATURAL-WATERS ; PRECONCENTRATION ; MICROEXTRACTION ; SAMPLES ; METHYLMERCURY
语种: 英语
WOS记录号: WOS:000340474500011
ISSN号: 0003-2719
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/20367
Appears in Collections:水环境工程研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Hubei Univ, Coll Chem & Chem Engn, Wuhan, Peoples R China

Recommended Citation:
Xiong, Xiong; Qi, Xiaoting; Liu, Jiantong; Wang, Juan; Wu, Chenxi.COMPARISON OF MODIFIERS FOR MERCURY SPECIATION IN WATER BY SOLID PHASE EXTRACTION AND HIGH PERFORMANCE LIQUID CHROMATOGRAPHY-ATOMIC FLUORESCENCE SPECTROMETRY,ANALYTICAL LETTERS,2014,():
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文件名: COMPARISON OF MODIFIERS FOR MERCURY SPECIATION IN WATER BY SOLID PHASE EXTRACTION AND HIGH PERFORMANCE LIQUID CHROMATOGRAPHY-ATOMIC FLUORESCENCE SPECTROMETRY.pdf
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