示差脉冲极谱法研究 Ⅸ.准可逆波和不可逆波理论及其验证

Investigation on Differential Pulse Polarography——IX. Theory and Its Experimental Verification for Quasireversible and Tondly Irreversible Wave

本文提出了受扩散和电极反应速率控制的示差脉冲极谱波方程式,它推导过程简单,具有明确的形式和涵义,以镍(Ⅱ)和锌(Ⅱ)-硝酸钾体系进行验证,实验结果与理论相符。

For the electrode reaction The instantaneous currents controlled by diffusion and charge transfer rates obey the following equation: where △E is pulse amplitude, δ is the elapsed time between pulse application and current measurement and c_O~* is the bulk concentration of reducible substance. the equation of irreversible wave is: Experiments were carried out on a pulse arograph (type F-78) to verify the theory. Tho theoretical conclusion is in good agreement with experimental data for the reduetion of Ni^(2+) in 0.1 mol·dm^(-3) KNO_3 solution and Zn^(2+) in 1.0 mol·dm^(-3) KNO_3 solution.