摘要
本文介绍用铜离子选择电极作指示电极,在适当浓度乙醇介质中,用DDTC为滴定剂,连续滴定矿石中的铜和镍或单独测定铜和镍。矿石中大量其它共存元素不干扰,可直接滴定。终点电位突跃明显,方法的精确度亦较好,在实际应用中具有推广价值。
NaDDTC has been used for simultaneously potentiometric tftration of copper and nickel ia ores. A CuS-Ag2S electrode is selected as the indicating electrode. After dissolving the samples,use NH3?H2O-NH4C1 buffer solution to adjust pH to 7-8, then titration is performed in 75% ethanol solution. Two endpoints can be attained. the first one is for Cu2+ and the latter for Ni2+. The results are agreed with certified values. The present method is rather simple and fast.
出处
《冶金分析》
CAS
CSCD
北大核心
1989年第5期30-32,共3页
Metallurgical Analysis
