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题名: Dispersive liquid-liquid microextraction of trace Hg2+ for visual and fluorescence test
作者: Liu, Jing1, 2;  Wu, Dapeng1;  Duan, Chunfeng1;  Guan, Yafeng1
关键词: Mercuric ion ;  Preconcentration ;  Visual ;  Fluorescence
刊名: TALANTA
发表日期: 2013-02-15
DOI: 10.1016/j.talanta.2012.11.061
卷: 105, 页:87-92
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: In this work, trace Hg2+ in environmental water samples was first preconcentrated by dispersive liquid-liquid microextraction (DLLME), and then was colorated by one common rhodamine B thiolactone (RBT) probe for visual and fluorescence detection. In this way, a highly sensitive and selective method was developed for field monitoring of Hg2+ in environmental waters. The color of RBT test solution could change clearly from colorless to pink around the level of 2 mu g L-1 Hg2+, which just meets with the maximum residue level of Hg2+ in drinking water recommended by U.S. EPA, so the water samples with Hg2+ concentration over 2 mu g L-1 could be selected rapidly by naked eye. Moreover, the quantification of Hg2+ could be obtained by fluorescence detection of test solution. The best extraction efficiency of Hg2+ by DLLLME could be obtained by using 200 mL water sample (pH 5.0, 50 degrees C), 150 mu L extraction solvent (lauric acid, LA) and 3 mL dispersive solvent (methanol). Thus an enrichment factor of similar to 407 and the limit of fluorescence detection of 0.03 mu g L-1 could be achieved. The method was also highly selective for Hg2+ with tolerance to at least 1000-fold of the foreign metal ions. This method was successfully applied to detect Hg2+ in deionized water, tap water and sea water. (C) 2012 Elsevier B.V. All rights reserved.
关键词[WOS]: ATOMIC-ABSORPTION-SPECTROMETRY ;  MERCURY DETERMINATION ;  SAMPLES ;  WATER ;  PRECONCENTRATION ;  CHEMODOSIMETER ;  REMEDIATION ;  EXTRACTION ;  IONS
语种: 英语
WOS记录号: WOS:000319088500015
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/137705
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Key Lab Separat Sci Analyt Chem, Dept Instrumentat & Analyt Chem, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

Recommended Citation:
Liu, Jing,Wu, Dapeng,Duan, Chunfeng,et al. Dispersive liquid-liquid microextraction of trace Hg2+ for visual and fluorescence test[J]. TALANTA,2013,105:87-92.
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