论文部分内容阅读
采用电化学聚合法制备了聚苯胺修饰的铂电极(PAN/Pt),并用循环伏安法(CV)研究了该电极对叶酸(FA)的电催化氧化性能。结果显示:FA在裸铂电极上的直接电化学氧化十分迟缓,无氧化峰出现,而在PAN/Pt修饰电极上0.561V处出现氧化峰,表明此电极对FA有很良好的电催化作用。另外,氧化峰电流与叶酸浓度在1×10-12 mol/L~1×10-6 mol/L范围内呈线性关系,检测限为1×10-11 mol/L。利用该电极测定市售叶酸片中的叶酸,获得令人满意的结果。
The polyaniline modified platinum electrode (PAN / Pt) was prepared by electrochemical polymerization. The electrocatalytic oxidation of folic acid (FA) was studied by cyclic voltammetry (CV). The results showed that the direct electrochemical oxidation of FA on the bare platinum electrode was very slow, no oxidation peak appeared, and the oxidation peak appeared at 0.561V on the PAN / Pt modified electrode, indicating that the electrode had a good electrocatalytic activity on FA. In addition, the oxidation peak current and folic acid concentration in the range of 1 × 10-12 mol / L ~ 1 × 10-6 mol / L showed a linear relationship with a detection limit of 1 × 10-11 mol / L. Folic acid was measured on the commercially available folate tablets using this electrode, and satisfactory results were obtained.