EDTA络合电位滴定法测定硫酸镍中镍的研究

Determination of Nickel in Nickel Sulfate by EDTA Complex Potentiometric Titration

本文采用铜离子选择电极为指示电极,Ag/Ag Cl电极为参比电极,Cu-EDTA溶液为指示剂,以EDTA为滴定剂,并优化了自动电位滴定仪参数,确定了最佳试验条件,运用自动电位滴定法直接测定硫酸镍中的主体元素镍。方法较EDTA滴定法更简单方便,自动化程度高,无需再用氯化锌标准溶液进行返滴定,最大程度地降低了判断终点所造成的误差,结果准确。

In this paper, the copper ion selective electrode was used as the electrode, Ag/AgCl electrode as the reference electrode, Cu-EDTA solution as the indicator, EDTA as the titrant, and optimized the parameters of the automatic potentiometric titrator to determine the best test conditions, Direct Determination of Nickel in Nickel Sulfate by Automatic Potentiometric Titration. Method is simpler and more convenient than EDTA titration, high degree of automation, no need to use zinc chloride standard solution for titration, the maximum extent to reduce the error caused by the end point, the results are accurate.