Simultaneous determination of dopamine, uric acid, and tryptophan using an MWCNT modified carbon paste electrode by square wave voltammetry

被引：27
|
作者：
Beitollahi, Hadi [1 ]
Mohadesi, Alireza [2 ]
Khalilizadeh Mahani, Saeedeh [2 ]
Karimi-Maleh, Hassan [3 ]
Akbari, Ali [4 ]
机构：
[1] Int Ctr Sci High Technol & Environm Sci, Res Inst Environm Sci, Dept Environm, Kerman, Iran
[2] Payame Noor Univ, Dept Chem, Tehran 193954697, Iran
[3] Islamic Azad Univ, Sci & Res Branch, Dept Chem, Mazandaran, Iran
[4] Univ Jiroft, Dept Chem, Jiroft, Iran
来源：
TURKISH JOURNAL OF CHEMISTRY | 2012年 / 36卷 / 04期
关键词：
Dopamine; uric acid; tryptophan; carbon nanotube paste electrode; modified electrode; FOLIC-ACID; ELECTROCHEMICAL DETERMINATION; ELECTROCATALYTIC OXIDATION; NANOTUBE; SENSOR; ELECTROANALYSIS; ELECTROPHORESIS; NOREPINEPHRINE; EPINEPHRINE;
D O I：
10.3906/kim-1112-5
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A highly sensitive method was investigated for the simultaneous determination of dopamine (DA), uric acid (UA), and tryptophan (TRP) using a multiwall carbon nanotubes/5-amino-3',4'-dimethoxy-biphenyl-2-ol modified carbon paste electrode (5ADMBCNPE). The 5ADMBCNPE displayed excellent electrochemical catalytic activities towards the oxidation of DA, UA, and TRP. The electrochemical profile of the proposed modified electrode was analyzed by cyclic voltammetry (CV), which showed a shift in the oxidation peak potential of DA at 160 mV to a less positive value compared with an unmodified carbon paste electrode. Square wave voltammetry (SWV) in 0.1 M phosphate buffer solution (PBS) at pH 7.0 was performed to determine DA in the range from 1.2 to 800.0 mu M, with a detection limit of 0.16 mu M. The present method was applied to the determination of DA in some real samples.
引用
收藏
页码：526 / 536
页数：11
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