The differential capacitance curves were measured with an ac bridge in the M/[N-MF + 0.1m M KCl + 0.1(1 - m) M KClO4], M/[N-MF + 0.1m M KBr + 0.1(1 - m) M KClO4], and M/[N-MF + 0.1 m MKI + 0.1(1 - m) M KClO4] systems (where M = In-Ga, TI-Ga) at the following values of molar fraction m of the surface-active anion: 0, 0.01, 0.02, 0.05, 0.1, 0.2, 0.5, and 1. The I-, Br- and Cl- (Hal(-)) anions specific adsorption in the above systems can be described quantitatively by the Frumkin isotherm. The main parameters of adsorption of the I-, Br-, and Cl- anions were determined for the studied interfaces. Unlike Ga/N-MF interface, where the adsorption energy (Delta G(ads)) increased in the sequence Br- approximate to I- < Cl-, at the (In-Ga)/N-MF and (TI-Ga)/N-MF interfaces, same as at the Hg/N-MF interface, it increased in the reverse sequence: Cl- < Br- Delta G(M-Br)(-) > Delta G(M-I)(-). The values of difference (Delta G(M-Hal), -Delta G(M-Hal2)) are higher for the Ga electrode and lower for the (In-Ga) and (Tl-Ga) electrodes than the values of difference between the Hal(-) solvation energies (Delta G(S-Hal1)) - Delta G(S-Hal2)), which determines the sequences of Hal(-) adsorption. (C) 2013 Published by Elsevier B.V.