Application of adsorptive stripping voltammetry to the simultaneous determination of bismuth and copper in the presence of nuclear fast red |
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Authors: | Gholivand M B Romiani A A |
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Institution: | Department of Chemistry, Razi University, Kermanshah, Iran |
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Abstract: | A sensitive and selective method for the simultaneous determination of copper and bismuth by adsorptive stripping was developed using nuclear fast red (2-anthracenesulfonic acid, 4-amino-9,10-dihydro-1,3-dihydroxy-9,10-dioxo-, monosodium salt) as selective complexing agent onto hanging mercury drop electrode. In a single scan both metals gave peaks that were distinctly separated by 85 mV allowing their determination in the presence of each other. Optimal analytical conditions were found to be: nuclear fast red concentration of 80 μM, pH of 2.8 and adsorptive potential of −300 mV versus Ag/AgCl. With accumulation time of 180 s the peaks currents are proportional to concentration of copper and bismuth over the 1-100 and 5-60 ng mL−1 range with detection limits of 0.2 and 1.2 ng mL−1, respectively. The procedure was applied to simultaneous determination of copper and bismuth in some real samples. |
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Keywords: | Copper and bismuth Adsorptive stripping voltammetry Nuclear fast red Simultaneous determination |
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