Modified glassy carbon electrode with multiwall carbon nanotubes as a voltammetric sensor for determination of leucine in biological and pharmaceutical samples

被引：31
|
作者：
Rezaei, B. [1 ]
Zare, Z. Mirahmadi [1 ]
机构：
[1] Isfahan Univ Technol, Dept Chem, Esfahan, IR, Iran
来源：
ANALYTICAL LETTERS | 2008年 / 41卷 / 12期
关键词：
cyclic voltammetry; electrocatalytic; leucine; modified glassy carbon electrode; multiwall carbon nanotubes;
D O I：
10.1080/00032710802238036
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A simple and highly sensitive method is described for voltammetric determination of leucine in blood and urine samples; namely, a glassy carbon electrode with an effective method is modified with multiwall carbon nanotubes (MWNTs). The cyclic voltammetric results indicated that MWNTs remarkably enhanced electrocatalytic activity toward the oxidation of leucine. Under the optimum condition the calibration curve was linear in the concentration range 9.0 x 10(-6) 1.5 x 10(-3) mol L-1, with the detection limit of 3.0 x 10(-6) mol L-1 and a relative standard deviation (RSD%) lower than 3.0% (n = 5). Also, some kinetic parameters were determined and a multistep mechanism for oxidation of leucine was proposed.
引用
收藏
页码：2267 / 2286
页数：20
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