Electrochemical Oxidation of Cysteine at a Film Gold Modified Carbon Fiber Microelectrode Its Application in a Flow-Through Voltammetric Sensor

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Title:	Electrochemical Oxidation of Cysteine at a Film Gold Modified Carbon Fiber Microelectrode Its Application in a Flow-Through Voltammetric Sensor
Authors:	Wang, Lai-Hao Huang, Wen-Shiuan
Contributors:	醫藥化學系
Keywords:	Micro Au-Modified Carbon Fiber Electrode Pulse Amperometric Detection Cysteine
Date:	2012-03
Issue Date:	2014-03-21 16:17:20 (UTC+8)
Publisher:	Mdpi Ag
Abstract:	A flow-electrolytical cell containing a strand of micro Au modified carbon fiber electrodes (CFE) has been designedand characterized for use in a voltammatric detector for detecting cysteine using high-performance liquid chromatography. Cysteine is more efficiently electrochemical oxidized on a Au /CFE than a bare gold and carbon fiber electrode. The possible reaction mechanism of the oxidation process is described from the relations to scan rate, peak potentials and currents. For the pulse mode, and measurements with suitable experimental parameters, a linear concentration from 0.5 to 5.0 mg.L-1 was found. The limit of quantification for cysteine was below 60 ng.mL(-1).
Relation:	Sensors, 12(3), 3562-3577
Appears in Collections:	[Dept. of Food & Drug Industry and Inspective Technology] Periodical Articles

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