CHROMATOGRAPHY OF CATIONS AND ANIONS ON MIXED SORBENT LAYERS DEVELOPED WITH AQUEOUS-METHANOL CONTAINING TRIBUTYL-PHOSPHATE AND FORMIC-ACID

The chromatographic behavior of some cations and anions has been exami ned on sorbent layers prepared from binary mixtures of different ratio s of alumina, silica gel, and cellulose developed with aqueous methano l containing tri-n-butyl phosphate and formic acid. Some binary and te rnary separations realized on mixed beds were not possible on single-c omponent layers. The results obtained on plain silica gel, alumina and cellulose have been compared with those obtained on mixed sorbents. M o6+ has been separated from VO2+, Th4+, and W6+ at different pH values . The effect of the amount of Mo6+ on its separation has also been inv estigated.