Chiral electrochemical sensing for tyrosine enantiomers on glassy carbon electrode modified with cysteic acid

被引：62

作者：

Nie, Runqiu ^{[1
]}

Bo, Xiangjie ^{[1
]}

Wang, Huan ^{[1
]}

Zeng, Lijun ^{[1
]}

Guo, Liping ^{[1
]}

机构：

[1] NE Normal Univ, Fac Chem, Changchun 130024, Peoples R China

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2013年 / 27卷

基金：

中国国家自然科学基金;

关键词：

Chiral electrochemical recognition; Tyrosine; Cysteic acid; Modified electrode; ENANTIOSELECTIVE RECOGNITION; VOLTAMMETRIC DETERMINATION; SENSITIVE DETERMINATION; AMINO-ACIDS; BEHAVIOR;

D O I：

10.1016/j.elecom.2012.11.014

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A chiral electrochemical sensor has been prepared via cysteic acid modified glassy carbon (CyA-GC) electrode to discriminate tyrosine (Tyr) enantiomers. Sweep cycles of CyA-GC in modification process and pH of solution were investigated to obtain optimum experimental conditions. Electrochemical impedance spectroscopy was employed to characterize the electrical conductivity of the modified electrode. For the first time, different oxidation peak potentials (E-p) of L- and D-Tyr were observed in the differential pulse voltammograms obtained in the solution containing L- or D-Tyr. Further study showed that only one peak appeared in mixture solution containing L- and D-Tyr and E-p of that peak shifted positively and linearly with an increasing percentage of L-isomer of Tyr racemic mixture. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：112 / 115

页数：4

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