Anodic stripping voltammetry of zinc at boron-doped diamond electrodes in ammonia buffer solution

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• 作者：Michael Langeloth ; Masanobu Chiku ; Yasuaki Einaga
• 关键词：Diamond electrodes ; Zinc ; Anodic stripping voltammetry
• 刊名：Electrochimica Acta
• 出版年：2010
• 出版时间：1 March 2010
• 年：2010
• 卷：55
• 期：8
• 页码：2824-2828
• 全文大小：412 K

文摘

This paper describes the deposition of zinc(II) with anodic stripping voltammetry on the boron-doped diamond electrode. We illustrate the dependency of several parameters on the magnitude of the oxidation peak and try to optimize the method. The supporting electrolyte was found to influence the oxidation peak magnitude. Compared with acetic acid, the most frequently used supporting electrolyte, ammonia buffer solution leads to a four times higher signal. We assume that the formation of zinc complexes, primarily tetraaminezinc(II), are responsible for the better response. Further factors studied and assessed include buffer pH, buffer concentration, deposition potential, deposition time and scan rate. With the improved conditions, a final detection limit of 5 ppb was accomplished.