Highly sensitive and selective voltammetric detection of mercury(II) using an ITO electrode modified with 5-methyl-2-thiouracil, graphene oxide and gold nanoparticles
Zhou, Na; Chen, Hao; Li, Jinhua; Chen, Lingxin
2013-04-01
发表期刊MICROCHIMICA ACTA
ISSN0026-3672
卷号180期号:5-6页码:493-499
产权排序[Zhou, Na; Chen, Hao; Li, Jinhua; Chen, Lingxin] Chinese Acad Sci, Shandong Prov Key Lab Coastal Zone Environm Proc, Yantai Inst Coastal Zone Res YIC,YICCAS, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai 264003, Peoples R China
摘要We have developed an electrochemical sensor for highly selective and sensitive determination of Hg(II). It is based on the specific binding of 5-methyl-2-thiouracil (MTU) and Hg(II) to the surface of an indium tin oxide (ITO) electrode modified with a composite made from graphene oxide (GO) and gold nanoparticles (AuNPs). This leads to a largely enhanced differential pulse voltammetric response for Hg(II). Following optimization of the method, a good linear relationship (R = 0.9920) is found between peak current and the concentration of Hg(II) in the 5.0-110.0 nM range. The limit of detection (LOD) is 0.78 nM at a signal-to-noise ratio of 3. A study on the interference by several metal ions revealed no interferences. The feasibility of this method was demonstrated by the analyses of real water samples. The LODs are 6.9, 1.0 and 1.9 nM for tap water, bottled water and lake water samples, respectively, and recoveries for the water samples spiked with 8.0, 50.0 and 100.0 nM were 83.9-96.8 %, with relative standard deviations ranging from 3.3 % to 5.2 %.; We have developed an electrochemical sensor for highly selective and sensitive determination of Hg(II). It is based on the specific binding of 5-methyl-2-thiouracil (MTU) and Hg(II) to the surface of an indium tin oxide (ITO) electrode modified with a composite made from graphene oxide (GO) and gold nanoparticles (AuNPs). This leads to a largely enhanced differential pulse voltammetric response for Hg(II). Following optimization of the method, a good linear relationship (R = 0.9920) is found between peak current and the concentration of Hg(II) in the 5.0-110.0 nM range. The limit of detection (LOD) is 0.78 nM at a signal-to-noise ratio of 3. A study on the interference by several metal ions revealed no interferences. The feasibility of this method was demonstrated by the analyses of real water samples. The LODs are 6.9, 1.0 and 1.9 nM for tap water, bottled water and lake water samples, respectively, and recoveries for the water samples spiked with 8.0, 50.0 and 100.0 nM were 83.9-96.8 %, with relative standard deviations ranging from 3.3 % to 5.2 %.
通讯作者Chen, LX (reprint author), Chinese Acad Sci, Shandong Prov Key Lab Coastal Zone Environm Proc, Yantai Inst Coastal Zone Res YIC,YICCAS, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai 264003, Peoples R China. lxchen@yic.ac.cn
关键词Mercury Ion 5-methyl-2-thiouracil Graphene Oxide Gold Nanoparticle
作者部门中科院海岸带环境过程与生态修复重点实验室
学科领域Chemistry, Analytical
项目资助者Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry, the National Natural Science Foundation of China [21275158]; 100 Talents Program of the Chinese Academy of Sciences
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收录类别SCI
关键词[WOS]SCREEN-PRINTED ELECTRODES ; SENSING PLATFORM ; HG2+ ; SAMPLES ; SENSOR ; ION ; PRECONCENTRATION ; SPECTROMETRY ; SPECIATION ; FILMS
文章类型Article
语种英语
WOS研究方向Chemistry
WOS记录号WOS:000316404000022
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被引频次:50[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.yic.ac.cn/handle/133337/6623
专题中科院海岸带环境过程与生态修复重点实验室
作者单位Chinese Acad Sci, Shandong Prov Key Lab Coastal Zone Environm Proc, Yantai Inst Coastal Zone Res YIC,YICCAS, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai 264003, Peoples R China
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Zhou, Na,Chen, Hao,Li, Jinhua,et al. Highly sensitive and selective voltammetric detection of mercury(II) using an ITO electrode modified with 5-methyl-2-thiouracil, graphene oxide and gold nanoparticles[J]. MICROCHIMICA ACTA,2013,180(5-6):493-499.
APA Zhou, Na,Chen, Hao,Li, Jinhua,&Chen, Lingxin.(2013).Highly sensitive and selective voltammetric detection of mercury(II) using an ITO electrode modified with 5-methyl-2-thiouracil, graphene oxide and gold nanoparticles.MICROCHIMICA ACTA,180(5-6),493-499.
MLA Zhou, Na,et al."Highly sensitive and selective voltammetric detection of mercury(II) using an ITO electrode modified with 5-methyl-2-thiouracil, graphene oxide and gold nanoparticles".MICROCHIMICA ACTA 180.5-6(2013):493-499.
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