乙异羟肟酸与Np(Ⅳ)、Pu(Ⅳ)配合物稳定常数的测定

DETERMINATION OF STABILITY CONSTANTS FOR Np(Ⅳ) AND Pu(Ⅳ) WITH ACETOHYDROXAMIC ACID

摘要: 研究了乙异羟肟酸 (AHA)与 Np( )、Pu( )的配位行为。研究结果表明 :乙异羟肟酸在2 0℃、1 mol L HCl O4 中 ,与 Np( )、Pu( )形成了摩尔比为 1∶ 1的配合物。相应配合物的稳定常数对数值 lgβ1 分别为 1 1 34、1 3 0 0。

Abstract: Acetohydroxamic acid has strong complexing ability for tetravalent actinides. Liquid liquid extraction method has been adopted for determining the stability constants of Np(Ⅳ)and Pu(Ⅳ) with acetohydroxamic acid. The complexes of both Np(Ⅳ)and Pu(Ⅳ) with acetohydroxamic acid have one co ordination number in 1mol/L HClO 4 at 20℃. The stability constants lg β 1 corresponding to Np(Ⅳ) and Pu(Ⅳ) are 11.34 and 13.00,respectively.