分析测试学报2011，Vol.30Issue(11)：1235-1240,6.DOI:10.3969/j.issn.1004-4957.2011.11.006
离子液体/多壁碳纳米管/壳聚糖修饰电极同时检测多巴胺、抗坏血酸及尿酸的研究
Simultaneous Voltammetric Determination of Dopamine, Ascorbic Acid and Uric Acid by Ionic Liquid/Multi-walled Carbon Nanotubes/Chitosan Composite Electrode
摘要
Abstract
An electrochemical sensing platform was developed based on the composite of ionic liquid (1-butyl-3-methylimidazolium dicyanamide, [ BMIM ] N ( CN)2 , IL), multi-walled carbon nano-tubes ( MWCNTs ) and polymeric matrix ( chitosan, CS ). Scanning electron microscope images showed that MWCNTs had a good dispersibility in the MWCNTs - IL - CS composite and formed a relative smooth film with unique structure. Electrochemical studies indicated that the MWCNTs - IL -CS composite provided a synergistic improvement on the electrochemical oxidation of dopamine(DA) , uric acid(UA) and ascorbic acid(AA) by the decrease of their anodic over-potentials and the enhancement of their amperometric responses. The peak separations between UA and DA, DA and AA were 114 mV and 208 mV, respectively. Additionally, the MWCNTs - IL - CS composite modified glassy carbon electrode(MWCNTs -IL -CS/GCE) showed a good analytical performance in the simultaneous determination of DA, AA and UA. The calibration curves of 5. 00 -425 μmol/L, 0. 020 -2. 25 mmol/L and 0. 050 - 10. 0 mmol/L, and the detection limits ( S/N = 3 ) of 1. 01, 10. 7 and 42. 9 u,mol/L were obtained for DA, AA and UA, respectively. With good selectivity and sensitivity, the present method is promising in the simultaneous determination of DA, AA and UA in real samples.关键词
离子液体/多壁碳纳米管/壳聚糖/电化学同时检测/多巴胺Key words
ionic liquid/ multi-walled carbon nanotube/ chitosan/ simultaneous voltammetric determination / dopamine分类
化学化工引用本文复制引用
许宇智,苏星鹏,赵欣,戴宗,邹小勇..离子液体/多壁碳纳米管/壳聚糖修饰电极同时检测多巴胺、抗坏血酸及尿酸的研究[J].分析测试学报,2011,30(11):1235-1240,6.基金项目
国家自然科学基金项目(20805059) （20805059）
