摘要
采用pH电位法测定了氯化稀土缬氨酸配合物Ln(Val)C13·6H2O(Ln=La、Nd、Sm、Gd、Er)的逐级稳定常数.实验结果表明氯化稀土缬氨酸配合物的第一级稳定常数(pK1)远大于第二级稳定常数(pK2),且其稳定性随稀土原子序数的增加而增大.
In the present work, the stability constants of complexes of rare-earth compounds with valine Ln(Val)Cl3·6H2O(Ln=La, Nd, Sm, Gd, Er) are determined by potentioetric titration at 25℃. First stability constants of the complexes are more than secondly it. The stability of the complexes increase with increasing the atomic number of rare-earth.
出处
《湖南城市学院学报（自然科学版）》
CAS
2004年第4期50-51,54,共3页
Journal of Hunan City University:Natural Science
基金
国家自然科学基金资助项目(No.20373072)
关键词
稀土
缬氨酸
配合物
电位滴定
稳定常数
rare earth
valine
complex
potentioetric titration
stability constants
