Electropolymerization of Azure A and pH Sensing Using Poly(azure A)-modified Electrodes
Electropolymerization of Azure A and pH Sensing Using Poly(azure A)-modified Electrodes
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DOI：
10.2116/analsci.20p341
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发表时间：
2020-10
影响因子：
1.6
通讯作者：
K. Sugiyama;Kazuhiro Watanabe;Sachiko Komatsu;Kentaro Yoshida;Tetsuya Ono;T. Fujimura;Yoshitomo Kashiwagi;Katsuhiko Sato
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文献类型：
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作者：
K. Sugiyama;Kazuhiro Watanabe;Sachiko Komatsu;Kentaro Yoshida;Tetsuya Ono;T. Fujimura;Yoshitomo Kashiwagi;Katsuhiko Sato
通过电聚合法将聚天青A（AA）固定在玻碳电极表面，制备了聚天青A修饰电极。在循环伏安法（CV）和微分脉冲伏安法（DPV）中，固定化的pAA表现出氧化还原响应。由于H^+离子的参与，氧化还原反应服从能斯特方程。此外，根据溶液pH值的峰电位移动。使用DPV比使用CV时更容易观察到氧化峰电位的移动，这表明所开发的电极可以用作pH传感器。该pH测量方法可成功应用于pH 1至10的范围内，并可成功重复50次以上。
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.