ABSTRACT
Ion exchange separations of Germanium (Ge) from accompanying elements can be achieved by use of anionic and cationic resins as well as chelating polymers. On anion exchange resins of the strongly basic type anionic Ge species are retained, while on nonchelating cation exchangers Ge is not adsorbed. These two facts have been utilized in connection with the determination of Ge in geological materials and industrial products. On strongly basic anion exchange resins, Ge is appreciably adsorbed as an anionic complex from media containing high concentrations of hydrochloric acid (HCl). Like Si, Ge is not adsorbed on cation exchange resins of the sulfonic acid type at any concentration of mineral acid such as hydrochloric or nitric acids. Selective adsorption of Ge can be achieved on a chelating resin based on a phenyl-fluorone derivative such as a resin obtained by the alkali-catalyzed condensation of resor-cylfluorone with formaldehyde.
