Anodic stripping voltammetry at in situ bismuth-plated carbon and gold microdisc electrodes in variable electrolyte content unstirred solutions |
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Authors: | Baldrianova L Svancara I Economou A Sotiropoulos S |
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Institution: | a Department of Analytical Chemistry, Faculty of Chemical-Technology, University of Pardubice, CZ-532 10 Pardubice, Czech Republic b Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece |
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Abstract: | Carbon and gold microdisc electrodes (30 and 10 μm, respectively) have been tested as substrates for in situ bismuth film plating from unstirred solutions of variable acetate buffer content and were subsequently used in the anodic stripping voltammetry determination of Pb(II) and Cd(II) ions. The effects of Bi(III) concentration, analyte accumulation time, stirring as well as supporting electrolyte content have been studied. Under optimal conditions good voltammetric responses were obtained by means of square wave anodic stripping voltammetry in unstirred analyte solutions of 5 × 10−8 to 10−6 M, even in the absence of added buffer. In an indicative application, Pb(II) ion levels were determined in tap water using bismuth-plated carbon microdisc electrodes. |
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Keywords: | Bismuth film electrodes Microelectrodes Carbon fibre electrodes Gold disc electrodes Anodic stripping voltammetry |
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