Parameters affecting the determination of mercury by anodic stripping voltammetry using a gold electrode

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• 作者：Agnese Giacomino ; Ornella Abollino ; Mery Mal ; rino ; Edoardo Mentasti
• 关键词：Mercury ; Anodic stripping voltammetry ; Gold electrode ; Supporting electrolyte ; Wave form
• 刊名：Talanta
• 出版年：2008
• 出版时间：15 March 2008
• 年：2008
• 卷：75
• 期：1
• 页码：266-273
• 全文大小：674 K

文摘

The electrochemical determination of aqueous Hg(II) by anodic stripping voltammetry (ASV) at a solid gold electrode is described. The aim of this work is to optimise all factors that can influence this determination. Potential wave forms (linear sweep, differential pulse, square wave), potential scan parameters, deposition time, deposition potential and surface cleaning procedures were examined for their effect on the mercury peak shape and intensity. Five supporting electrolytes were tested. The best responses were obtained with square wave potential wave form and diluted HCl as supporting electrolyte. Electrochemical and mechanical surface cleaning, aimed at removing the amount of mercury deposited onto the gold surface, were necessary for obtaining a good performance of the electrode. Response linearity, repeatability, accuracy and detection limit were also evaluated.