期刊
ANALYTICAL LETTERS
卷 41, 期 12, 页码 2267-2286出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/00032710802238036
关键词
cyclic voltammetry; electrocatalytic; leucine; modified glassy carbon electrode; multiwall carbon nanotubes
资金
- Isfahan University of Technology (IUT)
- Research Council and Center of Excellence in sensor
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.
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