New voltammetric strategy for determination of dopamine in the presence of high concentrations of acetaminophen, folic acid and N-acetylcysteine

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• 作者：Hadi Beitollahi^a ; ^{h.beitollahi@yahoo.com} ; Alireza Mohadesi^b ; Somayeh Mohammadi^b ; Ali Pahlavan^c ; Hassan Karimi-Maleh^d ; Ali Akbari^b
• 关键词：Dopamine ; Acetaminophen ; Folic acid ; N-acetylcysteine ; Carbon nanotube ; Modified carbon-paste electrode
• 刊名：Journal of Molecular Liquids
• 出版年：2012
• 期刊代码：61_01677322
• 类别：ch
• 出版时间：May, 2012
• 卷：169
• 期：Complete
• 页码：130-135
• 文件大小：663 K

摘要

A new electrochemical sensor for the simultaneous determination of dopamine (DA), acetaminophen (AC), folic acid (FA) and N-acetylcysteine (NAC) is described. The sensor is based on carbon-paste electrode (CPE) modified with 5-amino-3鈥?4鈥?dimethyl -biphenyl-2-ol (5ADB) and takes the advantages of carbon nanotubes (CNTs), which makes the modified electrode highly sensitive for the electrochemical detection of these compounds. Under the optimum pH of 7.0, the oxidation of DA occurs at a potential about 170 mV less positive than that of the unmodified CPE. Also, square wave voltammetry was used for the simultaneous determination of DA, AC, FA and NAC at the modified electrode.