期刊
CHINESE JOURNAL OF CATALYSIS
卷 35, 期 3, 页码 423-429出版社
SCIENCE PRESS
DOI: 10.1016/S1872-2067(14)60022-X
关键词
Voltammetry; Gold nanoparticle; Poly(L-methionine); Dopamine; Uric acid
资金
- Iranian Nanotechnology Society
A novel electrochemical sensor was fabricated by electrodeposition of gold nanoparticles on a poly(L-methionine) (PMT)-modified glassy carbon electrode (GCE) to form a nano-Au/PMT composite-modified GCE (nano-Au/PMT/GCE). Scanning electron microscopy and electrochemical techniques were used to characterize the composite electrode. The modified electrode exhibited considerable electrocatalytic activity towards the oxidation of dopamine (DA) and uric acid (UA) in phosphate buffer solution (pH = 7.00). Differential pulse voltammetry revealed that the electrocatalytic oxidation currents of DA and UA were linearly related to concentration over the range of 5.0 x 10(-8) to 10(-6) mol/L for DA and 7.0 x 10(-8) to 10(-6) mol/L for UA. The detection limits were 3.7 x 10(-8) mol/L for DA and 4.5 x 10(-8) mol/L for UA at a signal-to-noise ratio of 3. According to our experimental results, nano-Au/PMT/GCE can be used as a sensitive and selective sensor for simultaneous determination of DA and UA. (c) 2014, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据