Selective method for the determination of gold by anodic stripping voltammetry |
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Authors: | Mieczysław Korolczuk |
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Affiliation: | (1) Faculty of Chemistry, Maria-Curie Skodowska University, PL-20-031 Lublin, Poland |
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Abstract: | A highly selective method for the deter- mination of gold by anodic stripping voltammetry is described. For preconcentration a glassy carbon electrode, activated by deposition of small amounts of gold before the measurement, is proposed. The Au3+ reduction process at such an electrode is effective starting with the potential +0.4 V vs. Ag/AgCl electrode. A linear dependence of the current of the gold stripping peak on the gold concentration was obtained in the range from 5×10–8 to 1×10–6 mol/l. The relative standard deviation for 2×10-7 mol/l HAuCl4 was 4.2% (n=5). The detection limit was 4×10-9 mol/l. The accuracy of the method was verified by the determination of gold in reference materials. |
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