Modification of electrode surface with covalently functionalized graphene oxide by L-tyrosine for determination of dopamine

被引：23

作者：

Wang, Xiaohan ^{[1
]}

Zhang, Feifei ^{[1
]}

Xia, Jianfei ^{[1
]}

Wang, Zonghua ^{[1
]}

Bi, Sai ^{[1
]}

Xia, Lin ^{[1
]}

Li, Yanhui ^{[1
]}

Xia, Yanzhi ^{[1
]}

Xia, Linhua ^{[1
]}

机构：

[1] Qingdao Univ, Shandong Sinojapanese Ctr Collaborat Res Carbon N, Collaborat Innovat Ctr Marine Biomass Fiber Mat &, Coll Chem Sci & Engn,Growing Base State Key Lab,L, Qingdao 266071, Shandong, Peoples R China

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2015年 / 738卷

基金：

中国国家自然科学基金;

关键词：

L-Tyrosine; Graphene oxide; Dopamine; Covalent functionalization; Electrochemical biosensor; SIMULTANEOUS ELECTROCHEMICAL DETERMINATION; ASCORBIC-ACID; URIC-ACID; GRAPHITE OXIDE; NANOCOMPOSITE; BIOSENSOR;

D O I：

10.1016/j.jelechem.2014.12.005

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

An L-tyrosine (L-Tyr) covalently functionalized graphene oxide (GO) composite (Tyr-GO) has been prepared through amide bonds, which is further used to modify glassy carbon electrode (GCE) by simple dipping-drying method. The differential pulse voltammetry (DPV) peaks of dopamine (DA) and ascorbic acid (M) can be completely separated with a peak potential difference of 414 mV by using the fabricated Tyr-GO/GCE, holding promise for simultaneous determination of DA and AA. The peak currents are linearly with the concentration of DA in the range from 1.0 x 10(-6) to 5.0 x 10(-4) mol/L with a detection limit of 2.8 x 10(-7) mol/L. In addition, the modified electrode exhibits excellent reproducibility and stability. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：203 / 208

页数：6

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