Chromatographic Separations of Metal Ions on Zirconium Tungstoarsenate Impregnated Ion-Exchange Papers

Abstract

A new heteropolyacid salt ion-exchanger, zirconium tungstoarsenate, has been used for preparing impregnated ion-exchange papers. Twenty-nine metal ions have been chromatographed and R_F values determined in seven different mixed solvent systems containing 1-propanol and HNO³ or HCl. On the basis of the difference in selectivities for different metal ions on impregnated papers, a large number of binary and ternary separations has been obtained. Some of the important separations achieved are Ag⁺–Tl⁺, Ag⁺–Pt(IV), Zn²⁺–Hg²⁺, Sb³⁺–Bi³⁺, Zn²⁺–UO₂ ²⁺, Fe²⁺–Fe³⁺, Sb³⁺–Bi³⁺–Hg²⁺, Ag⁺–Ba²⁺–UO₂ ²⁺, and Ag⁺–Zn²⁺–Cu²⁺–Sn²⁺. The results are compared with those obtained on plain papers.