A Novel Method for Separating the Anodic Voltammetric Peaks of Dopamine and Ascorbic Acid |
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| Authors: | Haiying Gu Yi Xu Weilin Peng Genxi Li Hong-Yuan Chen |
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| Affiliation: | (1) Department of Biochemistry and National Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, 210093 Nanjing, P.R. China;(2) The Jiangsu Province Key Lab of Neuroregeneration, Department of Hygeian Analytical Chemistry, Nantong Medical College, 226001 Nantong, P.R. China;(3) Institute of Analytical Science, Department of Chemistry, Nanjing University, 210093 Nanjing, P.R. China |
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| Abstract: | This paper presents a simple and reliable method for separating the anodic peaks of dopamine (DA) and ascorbic acid (AA). Good electrochemical responses of DA and AA can be obtained at an electrochemically pretreated glassy carbon electrode (PGCE). The electrode reaction of DA is a quasi-reversible process, but the oxidation of AA is entirely irreversible. Consequently, the PGCE can be used to separate the anodic peaks of DA and AA. The separation can be higher than 290 mV, and the detection limit (S/N=3) of DA is 6.0×10–8M. This PGCE is very stable and can be used for as long as four weeks. |
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| Keywords: | : Dopamine ascorbic acid voltammetric separation. |
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