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应用循环伏安法在碳糊电极上电聚合形成聚邻氨基酚膜(P-OAP),以浸泡吸附法使膜吸入金属离子Ni~(2+),制成Ni~(2+)/P-OAP/CPE电极。电极经NaOH活化后,对多巴胺的电氧化的催化特性良好。薄膜的厚度、薄膜中Ni~(2+)的浓度、电极的活化时间以及缓冲溶液pH值均影响电极催化活性。多巴胺和抗坏血酸在膜电极上的氧化峰电位相差188 mV,可用于在大量抗坏血酸存在下对多巴胺的灵敏检测。
Cyclic voltammetry was used to electropolymerize poly-o-aminophenol film (P-OAP) on the carbon paste electrode to make the film absorb Ni ~ (2+) metal ions into the membrane by immersion adsorption method to make Ni ~ (2 +) / P -OAP / CPE electrode. After activation of the electrode by NaOH, the catalytic properties of dopamine for the electrooxidation are good. The thickness of the film, the Ni 2+ concentration in the film, the activation time of the electrode and the pH value of the buffer solution all affect the catalytic activity of the electrode. The oxidation peak potential of dopamine and ascorbic acid at the membrane electrode is 188 mV and can be used for the sensitive detection of dopamine in the presence of large amounts of ascorbic acid.