摘要
利用zn^(2+)在dE╱dt～E曲线上有敏锐的切口并可指示示波滴定终点的性质,提出了用硫脲释放出Cu-EDTA配合物中的EDTA,再用Zn^(2+)示波滴定该EDTA以测定铜含量的新方法。方法不用指示剂.溶液有颜色不影响测定,进行了多种合金中铜的测定,结果令人满意。
It is found that a sensitive and sharp cut is shown on the oscillopolarogram of dE/dt^E curve at the end point of the titration of EDTA with standard zinc( Ⅱ ) solution. Based on this phenomenon a method for the determination of copper is estab-lished by demasking of Cu EDTA complex with the addition of thiourea and titration of the equivalent amount of EDTA liberated with zinc standard solution. The proposed method has been applied to the determination of copper in some copper alloys,lead and tin base alloys with satisfactory results.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
1995年第3期141-142,共2页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
关键词
示波滴定
硫脲
合金
铜
Oscillopolarographic titration Thiourea Alloys Copper
