A Batch Injection Analysis System with Square-wave Voltammetric Detection for Fast and Simultaneous Determination of Zinc and Ascorbic Acid |
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Authors: | Michelle M. A. C. Ribeiro Raquel G. Rocha Prof. Rodrigo A. A. Munoz Prof. Eduardo M. Richter |
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Affiliation: | Institute of Chemistry, Federal University of Uberlandia, Av. João Naves de Ávila, 2121, 13400-970 Uberlândia, MG, Brazil |
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Abstract: | The determination of organic and inorganic compounds in a single run is still a great challenge. In this paper, we developed a method for fast simultaneous determination of ascorbic acid (AA) and zinc ions (Zn) using batch injection analysis with detection by square-wave anodic stripping voltammetry (BIA-SWASV). Britton-Robinson (BR) buffer solution (pH=6.0) as the supporting electrolyte and boron doped diamond (BDD) as the working electrode. The method presented favorable analytical characteristics such as fast response (67 injections h−1), low detection limits (0.2 and 5.4 μmol L−1 for Zn ions and AA, respectively) and recovery values of 99±3%. |
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Keywords: | Fast analysis Portable system Simultaneous determination Striping voltammetry Unmodified electrode |
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