A modified electrode was developed by immobilizing poly(azure A) (pAA) onto the surface of a glassy carbon electrode via the electropolymerization of azure A (AA). The pAA immobilized on the electrode exhibited redox response during cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The redox reaction obeyed the Nernst equation because of the involvement of H⁺ ions. In addition, the peak potential was shifted according to the solution pH. The shifts of the oxidation peak potential could be more easily observed using DPV than when using CV, indicating that the developed electrode could be useful as a pH sensor. This pH measurement method can be successfully applied in the pH range of 1 to 10 and can be successfully repeated more than 50 times.

通过天蓝色 A (AA) 的电聚合将聚 (天蓝色) (pAA) 固定在玻碳电极的表面上，从而开发出一种修饰电极。固定在电极上的 pAA 在循环伏安法 (CV) 和差分脉冲伏安法 (DPV) 期间表现出氧化还原响应。由于H ⁺离子的参与，氧化还原反应遵循能斯特方程。此外，峰电位根据溶液的 pH 值发生变化。与使用 CV 相比，使用 DPV 可以更容易地观察到氧化峰电位的变化，这表明开发的电极可用作 pH 传感器。这种 pH 测量方法可以成功应用于 1 到 10 的 pH 范围，并且可以成功重复 50 次以上。