The electrode reduction velocity constants of Calcium, Nickel and Manganese (Zinc) ions in various supporting electrolyte solutions and temperatures were measured by polarography. The rate constants of those ions calculated by Delahay's graphimetric method and Koutecky's method were matched in 50% of experimental error. This error would be accountable because of the application of thier approximate method. But there are magnificent differences between those values and Randles and Sentioomerton's. We, also, have attempted to deduce the simplified relation between velocity constant and electrocappilary characteristics, computing the velocity constant simply and rapidly, on which Kambara, lshii and Imai, Adachi had studied and established thier related equations using parameter x, y and z, for some limited range of x. And we have extended the equation to the wider range of y value than they did for the above mentioned ions.
Polarography에 의한 反應速度測定法 은 여러가지가 있고 또 많이 硏究되어 왔다. 그러나 그의 應用은 그렇게 많지 않으며, 본 실本 實驗에서는 Delabay의 圖解法과 Koutecky式을 利用하여 몇 가지 ion의 陰極反應速度를 求하고 이들 Data를 써서 簡易速度式을 檢討하였다.