Low-Voltage Paper Electrophoretic Study of Ion-Pair Formation and Electrochromatography of Inorganic Anions on Papers Impregnated with Titanium (IV) Tungstate

摘要

The ion-opair formation and electrochromatographic behavior of 22 anions are studied on plain and titanium (IV) tungstate impregnated papers using 0.1 N and 1N solutions of NaNO_3, Mg(NO_3)_2, Al(NO_3)_3, Cr(NO_3)_3, and Co(NO_3)-2 as background electrolytes. The effect of ion-pair formation on the migration of anions is studied. In general, the mechanism of migration is explained in terms of adsorption, precipitation, and complex formation. A number of binary and ternary separations are achieved. In Mg(NO_3)_2 media, the migration is correlated with the solubility of their magnesium salts for SO_3~(2-), C_2O_4~(2-), SeO_3~(2-), AsO_4~(3-), and Fe(CN)_6~(4-).