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为探索多元体系中稀土离子与氨基酸的配位作用,本文在25℃和0.15mol/dm~3(NPCl)离子强度条件下,用pH电位法测定了稀土—氨三乙酸分别与蛋氨酸、丝氨酸生成混配型配合物的稳定常数。讨论了上述混配型配合物稳定常数随稀土原子序数的变化规律以及钇的位置。
In order to explore the coordination between rare earth ions and amino acids in multivariate system, the effects of rare earth-nitrilotriacetic acid, methionine and serine were determined by pH potentiometry at 25 ℃ and 0.15mol / dm ~ 3 (NPCl) The stability constants of mixed complexes. The variation regularity of rare earth atomic number and the position of yttrium are discussed.