The páper is concerned with the study of adsorption on active charcoal in a set of selected substances from the group of aryloxyaminopropanol derivatives with carbamate substitution on the benzene ring with beta-adrenolytic effect (Group A) and a set of substances, derivatives of [(arylcarbonyí)oxy]aminopropano1 with the identi-cal, but assumed ultra-short effect (Group B), where the effect was produced by replacing the phenolether group with a metabolically unstable ester functional group. The course of adsorption in buffer solution with pH 7 in dependence on time and concentration is examined. Adsorptivity of substances is evaluated according to Fre-undlich and Langmuir models. Affinity of substances of Group A to adsorption materiál decreases with increa-sing hydrophilicity.

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