A Novel Voltammetric Method for the Determination of Maleic Acid Using Silver Amalgam Paste Electrode |
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| Authors: | Abdul Niaz Jan Fischer Jiří Barek Bogdan Yosypchuk Sirajuddin Muhammad Iqbal Bhanger |
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| Affiliation: | 1. National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan;2. Charles University in Prague, Faculty of Science, Department of Analytical Chemistry, UNESCO Laboratory of Environmental Electrochemistry, Hlavova 2030, 12843 Prague 2, Czech Republic;3. J. Heyrovsky Institute of Physical Chemistry of ASCR, v. v. i., Dolej?ova 3, 182?23 Praha 8, Czech Republic |
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| Abstract: | An efficient voltammetric method was developed for the determination of maleic acid at a silver amalgam paste electrode (AgA‐PE) in Britton–Robinson buffer pH 2.0. The experimental parameters, such as pH of Britton–Robinson buffer, type of the supporting electrolyte and activation of the electrode surface were optimized. Under the optimal conditions, a linear response was observed over the 2×10?6–1×10?4 mol L?1 maleic acid concentration range, determination limit being 5×10?7 mol L?1. A highly stable response, with a relative standard deviation (RSD) of 1.6% for 45 repetitive measurements of 1×10?4 mol L?1 maleic acid showed that there was no apparent surface passivation indicating the suitability of the method. The method was successfully applied for direct determination of maleic acid in drinking and river water. |
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| Keywords: | Voltammetry Maleic acid Silver amalgam paste electrode Drinking water River water Amalgams |
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