三乙撑四胺六乙酸在络合返滴定测定钯中的研究

Research and Application of New Indicator Systems and Triethylenetetram inehexaacetic Acid in Complexometic Back Titration of Palladium

提出了在不同ｐＨ值下，络合返滴定三乙撑四胺六乙酸（ＴＴＨＡ）以测定钯的六个灵敏新指示剂体系；建立了以镧－ＤＢＳ－偶氮氯膦作为络合滴定指示剂体系，研究了ＴＴＨＡ－Ｐｄ 络合物的特性及反应机理。

Six new sensitive indicator systems for the determination of palladium by back titration of triethylenetetramine hexaacetic acid at different pH values have been given in this work.A new method of good selectivity and high accuracy with lanthanum DBS chloro phosphonazo as indicator system was established for the determination of palladium by back titration of TTHA.The properties and reaction mechanism of TTHA Pd complex were investigated also.