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Analytical Letters Volume 44, 2011 - Issue 10
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ENVIRONMENTAL ANALYSIS

Carbon Nanotubes/Ionophore Modified Electrode for Anodic Stripping Determination of Lead

Tingting Lou CAS and Shandong Provincial Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, P. R. China; Institute of Oceanology, Chinese Academy of Sciences, Qingdao, P. R. China; Graduate University of Chinese Academy of Sciences, Beijing, P. R. China
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Dawei Pan CAS and Shandong Provincial Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, P. R. China; State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, P. R. ChinaCorrespondence[email protected]
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Yuane Wang CAS and Shandong Provincial Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, P. R. China; Institute of Oceanology, Chinese Academy of Sciences, Qingdao, P. R. China; Graduate University of Chinese Academy of Sciences, Beijing, P. R. China
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Lin Jiang CAS and Shandong Provincial Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, P. R. China; Institute of Oceanology, Chinese Academy of Sciences, Qingdao, P. R. China; Graduate University of Chinese Academy of Sciences, Beijing, P. R. China
&
Wei Qin CAS and Shandong Provincial Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, P. R. ChinaCorrespondence[email protected]
Pages 1746-1757 | Received 12 Jan 2010, Accepted 17 Aug 2010, Published online: 20 Jul 2011
 
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Abstract

Bifunctional combination of carbon nanotubes and ionophore is introduced for anodic stripping analysis of lead (Pb2+). Carbon nanotubes are employed to improve the detection sensitivity due to their excellent electrical conductivity and strong adsorption ability. An ionophore is utilized for its excellent selectivity toward Pb2+. The proposed carbon nanotubes/ionophore modified electrode shows improved sensitivity and selectivity for Pb2+. Low detection limit (1 nM), wide linear range (5 nM–8 µM) and excellent selectivity over other metal ions (Cd2+, Cu2+, and Hg2+) was obtained. The practical application has been carried out for determination of Pb2+ in real water samples.

Acknowledgments

This work was financially supported by the Chinese Academy of Sciences (KZCX2-YW-410, KZCX2-YW-JS208), the National Natural Science Foundation of China (40776058), the National 863 High Technology Project of the Ministry of Science and Technology of China (2007AA09Z103), the Natural Science Foundation of Shandong Province (2008ZRA06004, JQ200814), the Science and Technology Development Project of Yantai City (2009164), and the Taishan Scholar Program of Shandong Province.

Notes

a For 5% error.

a Not detectable.

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