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用循环伏安法研究了聚组氨酸修饰玻碳电极的制备及其对对苯二酚(HQ)的电催化作用。讨论了支持底液、pH、扫速等对对苯二酚测定的影响,优化了实验条件。实验表明,在最优条件下,对苯二酚在修饰电极上的峰电流与其浓度在1.0×10-5~2.3×10-4mol/L内呈良好的线性关系,最低检测限为7.2×10-7mol/L。此方法可应用于实际样品的测定。
Cyclic voltammetry was used to study the preparation of poly-histidine-modified glassy carbon electrode and its electrocatalytic activity for hydroquinone (HQ). The effects of support bottom solution, pH and sweeping speed on hydroquinone determination were discussed, and the experimental conditions were optimized. The experimental results show that under the optimal conditions, the peak current of the hydroquinone at the modified electrode shows a good linear relationship with the concentration of 1.0 × 10-5 ~ 2.3 × 10-4mol / L, the minimum detection limit is 7.2 × 10 -7mol / L. This method can be applied to the actual sample determination.