期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 633, 期 1, 页码 85-91出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2009.04.028
关键词
Silver nanoparticle and carbon nanotube modified carbon-paste electrode (Ag/CNT-CPE); Simultaneous determination; Dopamine Ascorbic acid
资金
- Persian Gulf University
- Sharif University of Technology
A novel modified carbon-paste electrode was employed for the simultaneous determination of dopamine (DA) and ascorbic acid (AA) with good selectivity and high sensitivity. Silver nanoparticle and carbon nanotube modified carbon-paste electrode (Ag/CNT-CPE) displayed excellent electrochemical catalytic activities towards dopamine (DA) and ascorbic acid (AA). The oxidation overpotentials of DA and AA were decreased significantly compared with those obtained at the bare CPE. Differential pulse voltammetry was used for the simultaneous determination of DA and AA. The peak separation between DA and AA was 67 mV. The calibration curves for DA and AA were obtained in the range of 8.0 x 10(-7) - 6.4 x 10(-5) M and 3.0 x 10(-5)-2.0 x 10(-3) M, respectively. The lowest detection limits (S/N = 3) were 3.0 x 10(-7) M and 1.2 x 10(-5) M for DA and AA, respectively. Method was applied to the determination of DA and AA in real samples. (C) 2009 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