期刊
ANALYTICA CHIMICA ACTA
卷 741, 期 -, 页码 15-20出版社
ELSEVIER
DOI: 10.1016/j.aca.2012.06.045
关键词
Imidazole; Gold nanoparticles; Ascorbic acid; Dopamine; Uric acid; Tryptophan
资金
- National Natural Science Foundation of China [21075100]
- Ministry of Education of China [708073]
- Nature Science Foundation of Chongqing City [CSTC-2009BA1003, 2011BA7003]
- State Key Laboratory of Electroanalytical Chemistry, China [SKIEAC 2010009]
A novel electrode was developed through electrodepositing gold nanoparticles (GNPs) on overoxidized-polyimidazole (PImox) film modified glassy carbon electrode (GCE). The combination of GNPs and the PImox film endowed the GNPs/PImox/GCE with good biological compatibility, high selectivity and sensitivity and excellent electrochemical catalytic activities towards ascorbic acid (AA), dopamine (DA), uric acid (UA) and tryptophan (Trp). In the fourfold co-existence system, the peak separations between AA-DA. DA-UA and UA-Trp were large up to 186, 165 and 285 mV, respectively. The calibration curves for AA, DA and UA were obtained in the range of 210.0-1010.0 mu M, 5.0-268.0 mu M and 6.0-486.0 mu M with detection limits (S/N = 3) of 2.0 mu M, 0.08 mu M and 0.5 mu M, respectively. Two linear calibrations for Trp were obtained over ranges of 3.0-34.0 mu M and 84.0-464.0 mu M with detection limit (S/N = 3) of 0.7 mu M. In addition, the modified electrode was applied to detect AA, DA, UA and Trp in samples using standard addition method with satisfactory results. (C) 2012 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