The values of the static and dynamic exchange capacity sulfoethylated polyallylamine by hydroxide ions. The effect of the acidity of the solution on the sorption medium ions of transition and alkaline earth metals by sulfoethylated polyallylamine at their joint presence in ammonium-acetate buffer solution under static conditions. It is found that increasing the degree sulfoethylation increases the selectivity of the concentration of silver ions (I) in comparison with copper ions (II) from solutions of complex composition.