selectivity for planar chromatography by ion exchange : Cation chromatography on papers impregnated with titanium(IV) based inorganic ion exchangers in DMSO-HNO3 mobile phases

Planar chromatography of thirty six metal ions on titanium(iv) phosphate, titanium(iv) tungstate and titanium(IV) molybdate impregnated papers in DMSO-HN03 mobile phases has been carried out. The ion-exchange capacity of papers is determined and the effects of solvent composition, impregnation and pH on Rr values are studied. For K^ Rb^ and Cs^ RF = KC^, where C is the nitric acid concentration. The movement of ions is explained on the basis of ion-exchange, adsorption and precipitation. Alberti and Torraccaʹs view for the prediction of elution sequence from Rf values has been checked. The sequence of adsorption of ions follows the order : titanium(IV) molybdate > titanium(iv) tungstate > titanium(iv) phosphate. Some of the analytically important separations are reported.