Voltammetric determination of L-dopa using a carbon nanotubes-Nafion modified glassy carbon electrode

被引：15
|
作者：
Xiang, Cuili
Zou, Yongjin
Xie, Jingjing
Fei, Ximing [1 ]
机构：
[1] Cent China Normal Univ, Dept Chem, Wuhan 430079, Peoples R China
[2] Wuhan Univ Technol, Dept Mat, Wuhan 430070, Peoples R China
来源：
ANALYTICAL LETTERS | 2006年 / 39卷 / 13期
关键词：
multiwalled carbon nanotubes; Nafion-modified electrode; voltammetry; L-dopa;
D O I：
10.1080/00032710600824706
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A method for determination of L-dopa by the adsorption stripping voltammetry (ASV) using a multiwalled carbon nanotubes (MWNTs)-Nafion modified glassy carbon electrode (GMGCE) was proposed. This chemically modified electrode (CME) shows a better stability. A sensitive oxidation peak was observed and the anodic peak potential is ca. 0.374V ( vs. SCE). The influences of various experimental parameters on the current peak were completely studied. Under the optimized condition, the method has been applied to the determination of L-dopa in samples. There is a good linear relationship between the peak current (i(p)) and L-dopa concentration in the range of 3.5 x 10(-7) similar to 1.5 x 10(-5) mol/L, with the limit of detection 5.0 x 10(-8) mol/L.
引用
收藏
页码：2569 / 2579
页数：11
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