Accumulation voltammetry of copper(II) at carbon-paste electrode containing salicylideneamino-2-thiophenol |
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Authors: | Kazuharu Sugawara Shunitz Tanaka Mitsuhiko Taga |
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Affiliation: | (1) Department of Chemistry, Faculty of Science, Hokkaido University, 060 Sapporo, Japan |
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Abstract: | Summary Accumulation voltammetry of copper(II) was investigated with a carbon-paste electrode containing salicylideneamino-2-thiophenol(SATP). Copper(II) was accumulated as the copper(II)-SATP complex on the electrode without an applied potential by immersing the electrode in 0.01 mol/l acetate buffer (pH 3.8) containing copper(II). The reduction peak of the copper(II)-SATP complex was observed at –0.12 V (vs. SCE) in 0.01 mol/l acetate buffer (pH 3.8) by scanning the potential in a negative direction. The calibration curve for copper(II) was linear in the range of 2×10–9–1×10–7 mol/l. Since the accumulation of copper(II) is based on a chemical reaction between copper(II) and SATP, copper(II) was selectively accumulated on the electrode. The presented method was applied to the determination of copper(II) in standard reference materials prepared by the National Institute for Environmental Studies. |
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