| 维生素B_1自组装膜修饰金电极对多巴胺、尿酸的电催化作用 |
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| 引用本文： | 杨秋霞,李国宝,张颖. 维生素B_1自组装膜修饰金电极对多巴胺、尿酸的电催化作用[J]. 分析化学, 2009, 37(7) |
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| 作者姓名： | 杨秋霞 李国宝 张颖 |
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| 作者单位： | 济南大学化学化工学院,济南,250022 |
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| 摘 要： | 用维生素B1(VB1)在金电极上进行自组装,制备了VB1自组装膜修饰金电极(VB1-Au/SAMs/CME).利用循环伏安法初步研究了此自组装单分子膜修饰电极的电化学行为.结果表明: VB1在金电极表面具有特性吸附.以3-/ 4-氧化还原电对为探针,考察了VB1自组装膜修饰金电极的电化学性质, VB1自组装膜的存在对3-/4-的电子转移具有明显的阻碍作用.研究了多巴胺(DA)和尿酸(UA)在此电极上的电化学行为.实验结果表明, DA和UA在此电极上均可被电催化氧化.差分脉冲伏安(DPV)氧化峰电流与DA浓度在2.0×10-5～4.0×10-4 mol/L范围内呈线性关系;测定UA的线性范围为6.0×10-5～2.2×10-4 mol/L,而且可实现这两种物质的同时测定.
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| 关 键 词： | 维生素B1 自组装 多巴胺 尿酸 电催化 化学修饰电极 |
Electrocatalytic Properties of Dopamine and Uric Acid at Vitamin B_1 Self-assembled Monolayer Gold Electrode |
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| YANG Qiu-Xia,LI Guo-Bao,ZHANG Ying. Electrocatalytic Properties of Dopamine and Uric Acid at Vitamin B_1 Self-assembled Monolayer Gold Electrode[J]. Chinese Journal of Analytical Chemistry, 2009, 37(7) |
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| Authors: | YANG Qiu-Xia LI Guo-Bao ZHANG Ying |
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| Affiliation: | YANG Qiu-Xia,LI Guo-Bao,ZHANG Ying(School of Chemistry and Chemical Engineering,University of Jinan,Jinan 250022) |
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| Abstract: | Vitamin B1 self-assembled monolayer modified electrode(VB1-Au/SAMs/CME)was prepared and its electrochemical behavior was studied by cyclic voltammetry.The results showed that a self-assembled monolayer(SAM)was formed on the surface of gold electrode.[Fe(CN)6]3-/4-redox couple was used as the electrochemical probe to study the electrochemical characteristics of SAM modified gold electrode and the results indicated that the existence of Vitamin B1 membrane on gold surface hindered the electron transfer.The ... |
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| Keywords: | Vitamin B1 self-assembled monolayer dopamine uric acid electrocatalysis chemically modified electrode |
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