Аннотация:The aim of this work has been to study, by measuring the differential capacitance, the effect of temperature on the adsorption of sodium dodecyl sulfate in the region of minimum capacitance and to calculate in this basis the thermodynamic adsorption parameters. Experimental results show that the time of formation of an adsorption layer in the region from 0 to -0. 5 V for the case of a 5 multiplied by (times) 10** minus **5 M solution of sodium lauryl sulfate was of the order of one minute. For solutions with a higher concentration the adsorption layer was formed more rapidly, and for one of the most dilute solutions of the surfactant (5 multiplied by (times) 10** minus **6 M) the capacitance ceased to change after 15 min. During this time the capacitance of the pure supporting electrolyte fell by 2-3%. With increase of temperature the capacitance of the double layer grew for all concentrations of the surfactant.