聚碱性品红修饰电极的制备及应用

Preparation of Poly(fuchsin basic) Modified Electrode and Its Application

研究了碱性品红在玻碳电极上聚合的最佳实验条件及其聚合机理，发现该修饰电极对多巴胺具有良好的催化作用，能大大提高多巴胺在玻碳电极上的响应，在pH=7.0的磷酸盐缓冲溶液中，用该修饰电极测定多巴腔的线性范围为2×10－7～1×10－5mol／L，检测限为1×10－7mol／L，并且具有稳定性好、响应快、选择性高等特点．

In this paper, the polymerization process and mechanism of fuchsin basic at the glassy carbon electrode were investigated. The polymerization conditions such as applied potential, time and buffer solution were found to affect the polymerzation process. In addition,the modified electrode showed a catalytic ability to the voltammetric response of dopamine.This ability was applied to the determination of dopamine in solution. In pH=7. 0 phosphate buffer solution, the linear range of dopamine was 2 × 10-7～1× 10－5 mol/L and the detection limit was 1 × 10-7 mol/L. This modified electrode had a good stability, high selectivity and fast response.