Аннотация:The adsorption of bitropenyl was studied by differential-capacitance measurements at the mercury/dimethylformamide interface in 0.1 M NaClO4 solutions. It was shown that the analytical model of differential capacitance which rests on an isotherm allowing for the mole fraction of adsorbate adequately describes the set of experimental data. The adsorption behavior of bitropenyl was discussed under the aspect of statistical estimates for the parameters in the adequate model.