电位溶出分析法理论公式的改进处理方法

电位溶出分析法理论研究,国内已有文献报道,文献的理论结论与实验结果吻合,但理论公式的处理尚不十分完善。本文在前人工作基础上,提出电位溶出分析法理论公式的改进处理方法,以期进一步论证该理论的严谨性。设溶出过程中金属M在汞膜中服从Fick’s第二扩散定律,并提出如下初始、边界条件:

A modified treatment for theoretical equation potentiometric stripping analysis

By using strictly math. methods, transition time equation and E-t curve equation were obtained. The equations are the same as those obtained by former workers, but conditions of application are: DMp2t/l2 ?4 for equations t = lc*M/f0-l2/3DM and E = E0 + (RT/nF)ln2l/(pDM+)1/2] + (RT/nF)ln t1/2/(t-t)], DMt/l2 > 16.7 for t = lc*M/f0 which are quite different from those given previously. Therefore, some inadequacy in the former theory of potentiometric stripping anal. with Hg membrane electrode are remedied.