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题名:
Nanomaterial/Ionophore-Based Electrode for Anodic Stripping Voltammetric Determination of Lead: An Electrochemical Sensing Platform toward Heavy Metals
作者: Dawei Pan(潘大为)1; Wang, Yuane1; Chen, ZhaoPeng(陈兆鹏)1; Lou, Tingting1; Wei Qin(秦伟)1,2
刊名: ANALYTICAL CHEMISTRY
出版日期: 2009-06-15
卷号: 81, 期号:12, 页码:5088-5094
关键词: CARBON-PASTE ELECTRODE ; SCREEN-PRINTED ELECTRODES ; FUNCTIONALIZED MESOPOROUS SILICA ; MERCURY FILM ELECTRODE ; COMPOSITE ELECTRODES ; NATURAL-WATERS ; FLOW-INJECTION ; TAP WATER ; TRACE ; CADMIUM
学科分类: Chemistry ; Analytical
产权排序: Chinese Acad Sci, Yantai Inst Coastal Zone Res Sustainable Dev, Environm Chem Lab;Yantai Univ, Sch Oceanol
通讯作者: Qin, W, Chinese Acad Sci, Yantai Inst Coastal Zone Res Sustainable Dev, Environm Chem Lab, Yantai 264003, Peoples R China
作者部门: 环境化学实验室
中文摘要: A novel nanomaterial/ionophore-modified glassy carbon electrode for anodic stripping analysis of lead (Pb2+) is described. Nanosized hydroxyapatite (NHAP) with width of 20-25 mn and length of 50-100 nm has been prepared and used to improve the sensitivity for detection of Pb2+ because it provides unique three-dimensional network structure and has strong adsorption ability toward Ph2+. An ionophore, usually used in ion-selective electrodes, is utilized here for its excellent selectivity toward Pb2+. Nafion, a cation-exchange polymer, is employed as the conductive matrix in which NHAP and the ionophore can be tightly attached to the electrode surface. Such a designed NHAP/ionophore/Nafion-modified electrode shows remarkably improved sensitivity and selectivity to Pb2+. The electrode has a linear range of 5.0 nM to 0.8 mu M with a 10 min accumulation time at open-circuit potential. The sensitivity and detection limit of the proposed sensor are 13 mu A/mu M and 1.0 nM, respectively. Interference from other heavy metal ions such as Cd2+, Cu2+, and Hg2+ associated with lead analysis can be effectively diminished. The practical application of the proposed sensor has been carried out for determination of trace levels of Pb2+ in real water samples.
英文摘要: A novel nanomaterial/ionophore-modified glassy carbon electrode for anodic stripping analysis of lead (Pb(2+)) is described. Nanosized hydroxyapatite (NHAP) with width of 20-25 mn and length of 50-100 nm has been prepared and used to improve the sensitivity for detection of Pb(2+) because it provides unique three-dimensional network structure and has strong adsorption ability toward Ph(2+). An ionophore, usually used in ion-selective electrodes, is utilized here for its excellent selectivity toward Pb(2+). Nafion, a cation-exchange polymer, is employed as the conductive matrix in which NHAP and the ionophore can be tightly attached to the electrode surface. Such a designed NHAP/ionophore/Nafion-modified electrode shows remarkably improved sensitivity and selectivity to Pb(2+). The electrode has a linear range of 5.0 nM to 0.8 mu M with a 10 min accumulation time at open-circuit potential. The sensitivity and detection limit of the proposed sensor are 13 mu A/mu M and 1.0 nM, respectively. Interference from other heavy metal ions such as Cd(2+), Cu(2+), and Hg(2+) associated with lead analysis can be effectively diminished. The practical application of the proposed sensor has been carried out for determination of trace levels of Pb(2+) in real water samples.
研究领域[WOS]: Chemistry
关键词[WOS]: CARBON-PASTE ELECTRODE ; SCREEN-PRINTED ELECTRODES ; FUNCTIONALIZED MESOPOROUS SILICA ; MERCURY FILM ELECTRODE ; COMPOSITE ELECTRODES ; NATURAL-WATERS ; FLOW-INJECTION ; TAP WATER ; TRACE ; CADMIUM
文章类型: Article
收录类别: SCI
语种: 英语
WOS记录号: WOS:000266969700054
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.yic.ac.cn/handle/133337/3440
Appears in Collections:环境化学实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Yantai Inst Coastal Zone Res Sustainable Dev, Environm Chem Lab, Yantai 264003, Peoples R China
2.Yantai Univ, Sch Oceanol, Yantai 264005, Peoples R China

Recommended Citation:
Pan, Dawei,Wang, Yuane,Chen, Zhaopeng,et al. Nanomaterial/Ionophore-Based Electrode for Anodic Stripping Voltammetric Determination of Lead: An Electrochemical Sensing Platform toward Heavy Metals[J]. ANALYTICAL CHEMISTRY,2009,81(12):5088-5094.
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