Published:Journal of Chromatographic Science,
ISSN 0021-9665Volume
38, Number 2, February 2000, pp. 61–66
Complexation
Ion-exchange Chromatography of Some Metal Ions on Papers Impregnated with Ti(IV)-Based
Inorganic Ion ExchangersS.D.
Sharma and R. Gupta Analytical Research Laboratory, Department of Chemistry,
Hindu College, B-3 Jigar Colony, Moradabad 244001, India
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 0.1M 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 RF 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 pKa of complexing acids on average
RF values of 3d series metal ions is explained. A number of
binary and ternary separations are achieved.
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