用萃取法测定镅、铕-乳酸根络合离子的稳定常数

A STUDY ON THE STABILITY CONSTANTS OF COMPLEXES OF Am (Ⅲ) AND Eu (Ⅲ) WITH LACTATE BY SOLVENT EXTRACTION

摘要: 研究了在水相中有乳酸根存在的条件下,磷酸三丁醋、二(2-乙基己基)磷酸及2-噻吩甲酰三氟丙酮三种萃取剂对镅和铕的萃取行为,由此求出了镅、铕与乳酸根的络合离子的稳定常数。对用萃取法测定络合物的稳定常数而言,二(2-乙基己基)磷酸的性能优于其他两种萃取剂。

Abstract: TBP, HDEHP and HTTA are used in the study of complex chemistry of Am and Eu with lactate. The dependence of distribution factor with the concentration of lactate ion is measured. From this the stability constants of Am(Lac)m.3-n and Eu(Lac)m3-n, as well as △G, △H and △S, are calculated by computor. HEDHP is considered to be the best extractant for this investigation.