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The chromatographic behavior of 40 metal ions is studied on titanium (IV) arsenate, titanium(IV) phosphate-, titanium (IV) molybdate-, titanium(IV) tungstate-, and titanium(IV) selenite-impregnated papers in 0.1 ? oxalic, citric, and tartaric acid as mobile phases. Similar studies are carried out on Whatman No. 1 papers for comparison. The ion-exchange capacity of these papers is determined, and their selectivity for different cations is discussed. The mechanism of migration is explained in terms of ion-exchange, precipitation, and adsorption. The prediction of elution sequence from  R  F  values is also checked. The average  Ri  is found to be almost linearly dependent on the charge of the metal ions. The effect of the p K  a  of complexing acids on average  R  F  values of 3d series metal ions is explained. A number of binary and ternary separations are achieved.

Complexation Ion-exchange Chromatography of Some Metal Ions on Papers Impregnated with Ti(IV)-Based Inorganic Ion Exchangers