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Electrochemical behavior of tryptophan and its derivatives at a glassy carbon electrode modified with hemin |
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| Authors: | Chen Guo Nan Zhao Zheng FengWang Xiu Li Duan Jian PingChen Hong Qin |
| Affiliation: | a Department of Chemistry, Fuzhou University, Fuzhou, Fujian 350002, China b School of Engineering and Science, Monash University Malaysia, Bandar Sunway, 46150 Petaling Jaya, Selangor, Malaysia c Analytical and Testing Center, Fuzhou University, Fuzhou, Fujian 350002, China |
| Abstract: | The electrochemical behavior of tryptophan (Trp) and its derivatives, such as indole-3-acetic acid (IAA), 5-hydroxytryptamine (5-HT), 5-hydroxy-indole-3-acetic acid (5-HIAA) and glycyl-tryptophan (Gly-Trp) peptide at a glassy carbon electrode modified with hemin (hemin/GC electrode) by electropolymerization have been investigated in detail. The results showed that the hemin/GC electrode would catalyze the electrochemical oxidation of Trp and its derivatives, based on which a differential pulse voltammetric procedure has been proposed for determination of Trp and its derivatives. Meanwhile, the electrochemical reaction mechanism for these compounds at hemin/GC electrode has been also investigated, and the results indicated that a two electron and two proton transfer was involved in the electrode reaction process. |
| Keywords: | Tryptophan and its derivatives Electrochemistry Hemin Modified electrode Electropolymerization |
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