PLANAR CHROMATOGRAPHY OF D-BLOCK METAL-IONS ON STANNIC PHOSPHATE SILICATE LAYERS IN BUFFERED EDTA SOLUTIONS - QUANTITATIVE SEPARATION OF ZIRCONIUM FROM OTHER METAL-IONS

Chromatographic behaviour of d-block metal ions on stannic phosphate s ilicate layers in buffered EDTA media at different pH values has been studied. The effect of pH of the media on R-f values of metal ions has been discussed. The migration of ions has been explained in terms of adsorption, ion exchange and precipitation. On the basis of differenti al migration of cations some binary and ternary separations have been achieved. Stannic phosphate silicate exhibits higher selectivity for T i-IV, Mo-VI, Zr-IV and W-VI. Quantitative separation of Zr-IV from bin ary and multi-ion synthetic mixtures containing larger amounts of othe r metal ions has been carried out.