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题名:
Highly sensitive and selective voltammetric detection of mercury(II) using an ITO electrode modified with 5-methyl-2-thiouracil, graphene oxide and gold nanoparticles
作者: Zhou, Na; Chen, Hao; Jinhua LI(李金花); Chen, Lingxin
刊名: MICROCHIMICA ACTA
ISSN号: 0026-3672
出版日期: 2013-04-01
卷号: 180, 期号:5-6, 页码:493-499
关键词: Mercury ion ; 5-Methyl-2-thiouracil ; Graphene oxide ; Gold nanoparticle
学科分类: Chemistry, Analytical
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
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
作者部门: 中科院海岸带环境过程与生态修复重点实验室
中文摘要: 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 %.
英文摘要: 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 %.
研究领域[WOS]: Chemistry
关键词[WOS]: SCREEN-PRINTED ELECTRODES ; SENSING PLATFORM ; HG2+ ; SAMPLES ; SENSOR ; ION ; PRECONCENTRATION ; SPECTROMETRY ; SPECIATION ; FILMS
文章类型: Article
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000316404000022
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.yic.ac.cn/handle/133337/6623
Appears in Collections:中科院海岸带环境过程与生态修复重点实验室_期刊论文

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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

Recommended Citation:
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.
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