用修饰电极导数伏安法同时测定多巴胺和肾上腺素  

Simultaneous Determination of Dopamine and Epinephrine atModified Electrode by Derivative Voltammetry

作　　者：何星存[1] 李平[1] 莫金垣[1] 

机构地区：[1]中山大学化学系,广东广州510275

出　　处：《分析测试学报》2000年第1期19-21,22,共4页Journal of Instrumental Analysis

基　　金：广东省自然科学基金!资助项目(960006)

摘　　要：研究了２，６ － 吡啶二甲酸在玻碳电极上电化学聚合的实验条件及修饰电极的电化学特性， 发现该聚合物膜修饰电极对多巴胺和肾上腺素的电化学氧化有显著的催化作用， 而对抗坏血酸等阴离子没有响应。 利用在修饰电极上循环伏安阴极过程多巴胺和肾上腺素的峰电位不同， 采用阴极化导数伏安法可同时测定多巴胺和肾上腺素。The polymerization conditions of 2,6 _ pyridine dicarboxylic acid at glassy carbon electrode and the electrochemical characteristics of the modified electrode have been investigated. It is found that the polymer shows strong catalytic effects on the electrooxidation of dopamine (DA) and epinephrine (EP), but shows no electrochemical response to anions such as ascorbic acid and nitrite. According to the difference of the reduction potentials of DA and EP, DA and EP in mixture can be determined simultaneously by cathodic derivative voltammetry with elimination of the interference from ascorbic acid.

关 键 词：修饰电极 多巴胺 肾上腺素 导数伏安法 神经递质 

分 类 号：Q577.03[生物学—生物化学] Q422