使用聚（3,5 - 二羟基苯甲酸）膜修饰电极在抗坏血酸存在下测定多巴胺
Determination of dopamine in the presence of ascorbic acid using poly(3,5-dihydroxy benzoic acid) film modified electrode.
作者信息
Hou Shurong, Zheng Na, Feng Haiyan, Li Xiangjun, Yuan Zhuobin
机构信息
College of Chemistry and Chemical Engineering, Graduate University, Chinese Academy of Sciences, 100049 Beijing, China.
出版信息
Anal Biochem. 2008 Oct 15;381(2):179-84. doi: 10.1016/j.ab.2008.03.055. Epub 2008 May 1.
A polymerized film of 3,5-dihydroxy benzoic acid (DBA) was prepared on the surface of a glassy carbon electrode (GCE) in neutral solution by cyclic voltammetry (CV). The poly(DBA) film-coated GCE exhibited excellent electrocatalytic activity toward the oxidation of dopamine (DA). A linear range of 1.0 x 10(-7) to 1.0 x 10(-4)M and a detection limit of 6.0 x 10(-8)M were observed in pH 7.4 phosphate buffer solutions. Moreover, the interference of ascorbic acid (AA) was effectively eliminated. This work provides a simple and easy approach to selective detection of DA in the presence of AA.
通过循环伏安法（CV）在中性溶液中的玻碳电极（GCE）表面制备了3,5 - 二羟基苯甲酸（DBA）的聚合膜。聚（DBA）膜修饰的GCE对多巴胺（DA）的氧化表现出优异的电催化活性。在pH 7.4的磷酸盐缓冲溶液中观察到线性范围为1.0×10⁻⁷至1.0×10⁻⁴M，检测限为6.0×10⁻⁸M。此外，有效地消除了抗坏血酸（AA）的干扰。这项工作提供了一种在AA存在下选择性检测DA的简单易行的方法。
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