Аннотация:The behavior of cucurbit[7]uril in the presence of magnesium sulfate at the electrode/solution interface was studied and quantified. The comparison with the results for system MgSO4–СВ6 obtained under the same conditions reveals their principal closeness. Key Words: supramolecular complexes, cucurbit[7]uril, adsorption properties, MgSO4 solutions, differential capacitance, stability constant