Simultaneous Determination of Antimony(III) and Molybdenum(VI) by Adsorptive Stripping Voltammetry Using Quercetin as Complexing Agent |
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Authors: | Carlos Rojas Verónica Arancibia Marisol Gómez Edgar Nagles |
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Institution: | Pontificia Universidad Católica de Chile, Facultad de Química, Vicu?a Mackenna 4860, Santiago–7820436, Chile |
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Abstract: | A sensitive and selective voltammetric method for simultaneous determination of Sb(III) and Mo(VI) using Quercetin (Q) as complexing agent is described. Optimal conditions were found to be: pH 3.7, CQ=6.0 µmol L?1 and Eacc=?0.10 V. The LOD (3σ) for Sb(III) are 0.076 and 0.040 µg L?1, whereas for Mo(VI) are 0.086 and 0.048 µg L?1 with tacc of 60 and 120 s, respectively. The method was validated using synthetic sea water (ASTM D665) and was applied to the determination of Sb(III) and Mo(VI) in natural waters with satisfactory results. |
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Keywords: | Antimony Molybdenum Quercetin Adsorptive stripping voltammetry |
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