碘离子选择性电极响应过程探讨

Discussion on the Response Process of Iodide Selective Electrced

在低浓度范围,以静态浸入法研究了碘离子选择性电极的响应动力学。实验结果表明,存在着一个临界浓度。低于此临界值时,电极的响应曲线是不连续的。电极响应曲线的数值分析表明,在搅拌条件下,慢表面过程是离子吸附反应;在不搅拌条件下,它是膜扩散过程和表面反应过程的叠加。

The dynamic response of iodide selective electrode was studied with stationary immersion method in low concentration.A critical activity data was observed and below which an uncontinuous response curve appeared. Numerical analysis shows that the ion adsorption process is probably the nature of slow surface process under stirring and it may be a mixed process of membrane diffusion and surface process under stationary status.