Synthesis and Ion-exchange Properties of Tantalum Arsenate

Abstract

A new inorganic ion-exchanger, tantalum arsenate, has been prepared under varying conditions. The exchanger prepared by mixing 0.1 M tantalum pentoxide and 0.1 M sodium arsenate in the ratio of 1:4 at pH 0 has been studied in detail for its ion-exchange capacity, pH titrations, and Kd values. The material can be prepared reproducibly. Its analytical importance has been established by the following quantitative separations: Zr4+ from Tm3+, Zr4+ from Eu3+, Pr3+ from Eu3+, and Pr3+ from Tm3+.