Аннотация:The adsorption of tetraethylammonium ions was studied in the presence of anions SO//4**2** minus , Br** minus , and I** minus at the solution/mercury interface by measuring capillary curves, and at the solution/air interface by measuring the maximum pressure in air bubbles. It is concluded from the potential dependence of adsorption energy that two potentials of maximum adsorption exist in the case of TEA bromide and TEA iodide; they are associated with two different orientations of the ion pairs TEA cation-halide anion in the compact double-layer part.