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A novel tin-bismuth alloy electrode for anodic stripping voltammetric determination of zinc |
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| Authors: | Dawei Pan Li Zhang Jianmei Zhuang Tanji Yin Wei Qin |
| Affiliation: | 1. CAS and Shandong Provincial Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264003, People’s Republic of China 2. Graduate University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China 3. The Key Lab in Molecular and Nano-materials Probes of the Ministry of Education of China, College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, 250014, People’s Republic of China |
| Abstract: | We report on a novel tin-bismuth alloy electrode (SnBiE) for the determination of trace concentrations of zinc ions by square-wave anodic stripping voltammetry without deoxygenation. The SnBiE has the advantages of easy fabrication and low cost, and does not require a pre-treatment (in terms of modification) prior to measurements. A study on the potential window of the electrode revealed a high hydrogen overvoltage though a limited anodic range due to the oxidation of tin. The effects of pH value, accumulation potential, and accumulation time were optimized with respect to the determination of trace zinc(II) at pH 5.0. The response of the SnBiE to zinc(II) ion is linear in the 0.5–25?μM concentration range. The detection limit is 50?nM (after 60?s of accumulation). The SnBiE was applied to the determination of zinc(II) in wines and honeys, and the results were consistent with those of AAS. A novel tin-bismuth alloy electrode was used for determination of trace Zn2+ in wines and honeys by square-wave anodic stripping voltammetry without any deoxygenating. |
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