Thermodynamics of adsorption of ionic surfactants at water/alkane interfaces.On the basis of experimental data for the homologous series of alkyltrimethylammonium bromides (CnTAB) the equilibrium surface tension isotherms at three types of liquid-fluid interfaces are discussed: solution/air, solution/alkane vapor and solution/liquid alkane interfaces.  It is shown that the adsorption characteristics can be described at all three interfaces by the same thermodynamic approach. 
THERM