Electrochemical behavior of a carbon paste electrode modified with 5-amino-3鈥?4鈥?dimethyl-biphenyl-2-ol/carbon nanotube and its application for simultaneous determination of isoproterenol, acetaminophen and N-acetylcysteine

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• 作者：Hadi Beitollahi^a ; ^{h.beitollahi@yahoo.com} ; Alireza Mohadesi^b ; Somayeh Mohammadi^b ; Ali Akbari^b
• 关键词：Isoproterenol ; Acetaminophen ; N-acetylcysteine ; Carbon nanotubes ; Carbon paste electrode ; Modified electrode
• 刊名：Electrochimica Acta
• 出版年：2012
• 期刊代码：30_00134686
• 类别：ch
• 出版时间：30 April, 2012
• 卷：68
• 期：Complete
• 页码：220-226
• 文件大小：610 K

摘要

In this study, a carbon paste electrode modified with carbon nanotubes and 5-amino-3鈥?4鈥?dimethyl-biphenyl-2-ol (5ADB) was used to prepare a novel electrochemical sensor. The objective of this novel electrode modification was to seek new electrochemical performances for the detection of isoproterenol (IP) in the presence of acetaminophen (AC) and N-acetylcysteine (NAC). The peak potentials recorded in a phosphate buffer solution (PBS) of pH 7.0 were 265, 445 and 950 mV vs. Ag/AgCl/KCl (3.0 M) for IP, AC and NAC, respectively. Under the optimum pH of 7.0, the oxidation of IP occurred at a potential about 215 mV less positive than that of the unmodified CPE. The response of catalytic current with IP concentration showed a linear relation in the range from 4.0 脳 10^鈭? to 9.0 脳 10^鈭? M with a detection limit of 2.0 脳 10^鈭? M.