“…The total amount adsorbed is n s = n s 1 + n s 2 . The excess isotherms, n s(n) i = f(x i ), i = 1, 2, were analysed using the method of Schay and Nagy (Dékány et al, 1985(Dékány et al, , 1986aLagaly et al, 1997, chapter 14). One obtains the adsorbed amounts n s 1 and n s 2 at equilibrium concentrations corresponding to the linear section of the composite isotherm.…”