Regression analysis of dependences of adsorption potential shifts on the charge in systems (Tl-Ga)/[N-methylformamide + mc KI + (1 − m)c KClO4], (Tl-Ga)/[N-methylformamide + mc KBr + (1 − m)c KClO4] and (Tl-Ga)/[N-methylformamide + mc KCl + (1 − m)c KClO4]

By the regression analysis of dependences of the adsorption potential shift (Eads) on the electrode charge in systems (Tl-Ga)/[NMF + 0.1m M KI + 0.1(1 − m) M KClO4], (Tl-Ga)/[NMF + 0.1m M KBr + 0.1(1 − m) M KClO4], and (Tl-Ga)/[NMF + 0.1m M KCl + 0.1(1 − m) M KClO4] with the following m fractions of the surface-active anion: 0.05, 0.1, 0.2, 0.5, and 1, the adsorption parameters are calculated in terms of two models based on the Frumkin isotherm both considering the free adsorption energy as a quadratic function of the electrode charge, where one model takes into account the diffuse layer and the other ignores it. It is shown that for the studied electrode charges q ≤ 2 μC/cm2, both models provide equal accuracy in calculating Eads in the systems under study.