摘要
提出了直流示波极谱滴定高含量钼的新方法,在pH为4.5～5.5的乙酸-乙酸铵缓冲溶液中.以Pb(Ⅱ)为滴定剂滴定钼酸根离子,用JP-IA型示波极谱仪作检测器.根据滴定过程中铅波的出现来指示终点的到达.方法简便、快速,结果的准确度、精密度均符合容量分析的要求,适于各类高含量钼矿样中钼的测定.
A new method for the oscillopolarographic titration of Mo(VI) is presented in this paper. The Mo(VI) in a buffer solution of HOAc-NH_1OAc at pH 4. 5~5. 5 is titrated with a standard solution of Pb(I) ion to form lead molybdate precipitate. Upon the complete precipitation of Mo( VI ) by the Pb ( I ) ion a sensitive and sharp Pb( I ) wave due to a slight excess of the titrating solution will appear on the screen of the JP-IA oscillopo-larograph which indicated the end point of the titration. The proposed method has been applied to the analysis of molybdenum concentrate.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
1999年第7期293-294,297,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
关键词
单扫示波极谱
滴定
钼
测定
Single-sweep oscillopolarographic titration
Lead ( I )
Molybdenum ( VI )
