摘要
过对Bi3+ 、Pb2 + 混合液配制方法与测定结果的关系实验 ,确定了硝酸铋溶解时浓HNO3 用量及滴定Bi3+ 的新方法。络合法连测Bi3+ 和Pb2 + 后的废液可用硫化钠沉淀 ,用稀硝酸溶解 ,再次配成所需酸度和Bi3+ 、Pb2 + 浓度的混合液。
Relations between preparation of mixed solution containing Pb 2+ ,Bi 3+ and determination results were studied.During Bi(NO 3) 3 dissolving,quantity of HNO 3 needed was determined,also with the new method of titration of Bi 3+ .Sodium sulfide is used as precipitant to deal with the waste liquor after the continuous determination of Bi 3+ and Pb 2+ in which complexion is used.Then dilute nitric acid is used to dissolve the precipitate.And mixed solution with needed acidity and concentration of Bi 3+ and Pb 2+ can be prepared once again,for the students' use in experiments repeatedly.
出处
《化学工程师》
CAS
2001年第4期45-46,共2页
Chemical Engineer
