Stripping voltammetric determination of mercury(II) at antimony-coated carbon paste electrode |
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Authors: | Ashrafi Amir M Vytřas Karel |
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Affiliation: | Department of Analytical Chemistry, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic |
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Abstract: | A new procedure was elaborated to determine mercury(II) using an anodic stripping square-wave voltammetry at the antimony film carbon paste electrode (SbF-CPE). In highly acidic medium of 1 M hydrochloric acid, voltammetric measurements can be realized in a wide potential window. Presence of cadmium(II) allows to separate peaks of Hg(II) and Sb(III) and apparently catalyses reoxidation of electrolytically accumulated mercury, thus allowing its determination at ppb levels. Calibration dependence was linear up to 100 ppb Hg with a detection limit of 1.3 ppb. Applicability of the method was tested on the real river water sample. |
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Keywords: | Antimony film electrodes Carbon paste electrodes Stripping voltammetry Mercury(II) determination Cadmium(II) apparent catalytic effect |
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