Separation of lithium from dead sea brines by gel permeation chromatography.

Fractionation of Dead Sea brines by differential migration through a polyacrylamide gel is shown to be feasible. Lithium-enriched fractions obtained in the process contain no calcium or magnesium and only small quantities of sodium and potassium.

Interaction of palladium with sulphaguanidine.

The formation constants of palladium with chloride ions have been determined by a new approach to the interpretation of the ultraviolet spectra. The interaction of PdCl(4)(2-) with sulphaguanidine (SG) has been interpreted and evaluated quantitatively. The formation constants of the mixed ligand complex Pd(SG)(2),Cl(2), were determined spectrophotometrically.

Interaction of Dowex A-1 chelating resin with sparingly soluble calcium salts.

The interaction between Dowex A-1 and sparingly soluble salts obeys the mass action law if no other salts are present in the solution. Increasing the total amount of charged species in the solution causes a decrease in the distribution coefficients of calcium, the decrease being in accordance with a simple function of the concentrations of the sodium ion and the precipitating anion in solution. The relations between the adsorbability and the solubility products have also been derived.