Journal
TALANTA
Volume 85, Issue 5, Pages 2700-2702Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2011.07.078
Keywords
Antimony film electrodes; Carbon paste electrodes; Stripping voltammetry; Mercury(II) determination; Cadmium(II) apparent catalytic effect
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Funding
- Ministry of Education, Youth and Sports of the Czech Republic [MSM0021627502]
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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( Ill) 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. (C) 2011 Published by Elsevier B.V.
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