吲哚-3-丁酸在多壁碳纳米管修饰电极上的电化学行为研究及其测定  

Study on the Electrochemical Behavior and Determination of Indole-3-Butyric Acid Using a Multi-walled Carbon Nanotubes Film Coated Glassy Carbon Electrode

作　　者：吕少仿[1] 葛杏莉[1] 

机构地区：[1]孝感学院化学系,湖北孝感432000

出　　处：《孝感学院学报》2006年第6期5-8,共4页JOURNAL OF XIAOGAN UNIVERSITY

基　　金：湖北省教育厅重点科研项目基金(B200526005)

摘　　要：基于多壁碳纳米管膜修饰玻碳电极建立了一种直接测定吲哚-3-丁酸的电分析方法。考察了吲哚-3-丁酸在多壁碳纳米管膜电极上的伏安行为，发现它在0．73V（vs．SCE）处有一个灵敏的氧化峰。与裸玻碳电极相比，多壁碳纳米管膜电极显著提高了吲噪-3-丁酸的氧化峰电流。在优化后的实验条件下，氧化蜂电流与吲哚-3-丁酸的浓度在9．0×10^-7～5．0×10^-5mol／L之间有很好的线性关系，开路富集3min后，其检出限为5．0×10^-8mol／L。在用于测定模拟样品中吲噪-3-丁酸的含量时，检测限低、分析速度快、重现性好。A multi-walled carbon nanotubes film coated glassy carbon electrode had been developed for the direct determination of indole-3-butyric acid （IBA）. At the MWNT-modified GCE, IBA yielded a well-defined oxidation peak at 0. 73V（vs. SCE） in pH2. 0 phosphate buffer solution. Compared with the bare GCE, the MWNT-modified significantly increased the oxidation peak current of IBA. The electrochemical behavior of IBA at the MWNT-modified GCE were examined, the experimental parameters for the determination of IBA were optimized. Under optimum conditions, the oxidation peak current increased linearly with the concentration of IBA over the range from 9. 0× 10^-7～5. 0× 10^-5 mol/L with a detection limit of 5. 0 × 10^-8 mol/L after 3 min of open-circuit accumulation. The MWNT film coated GCE has been used to detect IBA sample solution.

关 键 词：多壁碳纳米管 化学修饰电极 吲哚-3-丁酸 电化学测定 

分 类 号：O657.1[理学—分析化学]