乙二胺四乙酸二钠(以下简称EDTA)能与很多金属生成非常稳定的络合物,近年来,广泛地运用它来测定许多金属,但一系列的研究表明,铀酰离子与EDTA生成的络合物不稳定,因此在分离和测定铀时,EDTA通常用作掩蔽剂。四价铀具有较小的离子半径和较多的电荷,可以预料,它能与EDTA生成稳定的络合物,但文献上这方面的资料极少,克雷金(А.Е.Клыгин)等曾测定了四价铀与EDTA的络合 Disodium ethylenediaminetetraacetate (hereinafter referred to as EDTA) can form a very stable complex with many metals. In recent years, it has been widely used to determine many metals. However, a series of studies have shown that uranyl ion and EDTA Complexes are not stable, so EDTA is often used as a screening agent when separating and measuring uranium. Tetravalent uranium has a smaller ionic radius and more charge, and it can be expected that it will form a stable complex with EDTA, but there is very little literature in the literature, such as А.Е.Клыгин The complexation of tetravalent uranium with EDTA has been determined