Abstract
The retention behavior of 25 anions on 1:1 silica gel G-starch layers has been studied using two-component non-aqueous mobile phases or aqueous solutions of organic acids and their sodium salts. It was observed that the higher the p K a values of the acids used, the lower the R F values of the anions. Migration depends both on the solubility of the corresponding acid of the anion studied and on adsorption. Quantitative separation of fluoride, molybdate, dichromate, and arsenate ions from other anions has been achieved. The R F values of the anions were found to correlate with their lyotropic numbers.
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