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Dispersive liquid-liquid microextraction of trace Hg2+ for visual and fluorescence test
Liu, Jing1,2; Wu, Dapeng1; Duan, Chunfeng1; Guan, Yafeng1
关键词Mercuric Ion Preconcentration Visual Fluorescence
刊名TALANTA
2013-02-15
DOI10.1016/j.talanta.2012.11.061
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
关键词[WOS]ATOMIC-ABSORPTION-SPECTROMETRY ; MERCURY DETERMINATION ; SAMPLES ; WATER ; PRECONCENTRATION ; CHEMODOSIMETER ; REMEDIATION ; EXTRACTION ; IONS
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.
语种英语
WOS记录号WOS:000319088500015
引用统计
被引频次:11[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/137705
专题中国科学院大连化学物理研究所
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
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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.
APA Liu, Jing,Wu, Dapeng,Duan, Chunfeng,&Guan, Yafeng.(2013).Dispersive liquid-liquid microextraction of trace Hg2+ for visual and fluorescence test.TALANTA,105,87-92.
MLA Liu, Jing,et al."Dispersive liquid-liquid microextraction of trace Hg2+ for visual and fluorescence test".TALANTA 105(2013):87-92.
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