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Nanomaterial/ionophore-based electrode for anodic stripping voltammetric determination of lead: an electrochemical sensing platform toward heavy metals.
Anal Chem. 2009 Jun 15; 81(12):5088-94.AC

Abstract

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 nm 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 Pb(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 microM with a 10 min accumulation time at open-circuit potential. The sensitivity and detection limit of the proposed sensor are 13 microA/microM 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.

Authors+Show Affiliations

Laboratory of Environmental Chemistry, Yantai Institute of Coastal Zone Research for Sustainable Development, Chinese Academy of Sciences, Yantai 264003, PR China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19435334

Citation

Pan, Dawei, et al. "Nanomaterial/ionophore-based Electrode for Anodic Stripping Voltammetric Determination of Lead: an Electrochemical Sensing Platform Toward Heavy Metals." Analytical Chemistry, vol. 81, no. 12, 2009, pp. 5088-94.
Pan D, Wang Y, Chen Z, et al. Nanomaterial/ionophore-based electrode for anodic stripping voltammetric determination of lead: an electrochemical sensing platform toward heavy metals. Anal Chem. 2009;81(12):5088-94.
Pan, D., Wang, Y., Chen, Z., Lou, T., & Qin, W. (2009). Nanomaterial/ionophore-based electrode for anodic stripping voltammetric determination of lead: an electrochemical sensing platform toward heavy metals. Analytical Chemistry, 81(12), 5088-94. https://doi.org/10.1021/ac900417e
Pan D, et al. Nanomaterial/ionophore-based Electrode for Anodic Stripping Voltammetric Determination of Lead: an Electrochemical Sensing Platform Toward Heavy Metals. Anal Chem. 2009 Jun 15;81(12):5088-94. PubMed PMID: 19435334.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Nanomaterial/ionophore-based electrode for anodic stripping voltammetric determination of lead: an electrochemical sensing platform toward heavy metals. AU - Pan,Dawei, AU - Wang,Yuane, AU - Chen,Zhaopeng, AU - Lou,Tingting, AU - Qin,Wei, PY - 2009/5/14/entrez PY - 2009/5/14/pubmed PY - 2009/8/15/medline SP - 5088 EP - 94 JF - Analytical chemistry JO - Anal Chem VL - 81 IS - 12 N2 - 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 nm 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 Pb(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 microM with a 10 min accumulation time at open-circuit potential. The sensitivity and detection limit of the proposed sensor are 13 microA/microM 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. SN - 1520-6882 UR - https://www.unboundmedicine.com/medline/citation/19435334/Nanomaterial/ionophore_based_electrode_for_anodic_stripping_voltammetric_determination_of_lead:_an_electrochemical_sensing_platform_toward_heavy_metals_ L2 - https://doi.org/10.1021/ac900417e DB - PRIME DP - Unbound Medicine ER -