Determination of levodopa in pharmaceutical preparations by irreversible biamperometry |
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Authors: | Li Jun Li Qi Feng Chen Hao Cheng Lai Bo Yu Jian Ling Wu |
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Institution: | a Department of Biological and Chemical Engineering, Guangxi University of Technology, Liuzhou 545006, China;b College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004,China |
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Abstract: | Based on the electrocatalytic oxidation of levodopa at gold electrode and the reduction of permanganate at platinum electrode, a novel flow injection irreversible biamperometric method is developed for the determination of levodopa under the potential difference of 0 V imposed between two electrodes. In H2SO4 solution, the linear relationships between currents and the concentrations of levodopa are obtained in the range from 0.04mg/L to 20mg/L with the detection limit of 0.012mg/L. The proposed method is applied to the determination of levodopa in pharmaceutical preparations. |
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Keywords: | Flow injection Levodopa Irreversible biamperometry Gold electrode Platinum electrode |
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