The effect of pH on a multiprotonatable quinidine ion-selective electrode.
The pH effect on the quinidine ion-selective electrode performance and its electroactive material composition were investigated. It was found that variation of the pH in the bulk solution can alter the ion-pair composition in the membrane phase, thus affecting the electrode behaviour. A capacitor model was suggested for the description of the electrode response.
Wan-Li
M
M
Research Institute for Material Protection, Wuhan Institute of Technology, Wuhan 430070, People's Republic of China.