Sorption isotherms in materials of biological origin mathematical and physical approach Original Research Article

The parameters of the `G.A.B.ʹ equation are discussed from mathematical and physical point of view. Clear limits of those parameters are determined. The point of inflexion of the `G.A.B.ʹ isotherm was also analysed with the conclusion that the `G.A.B.ʹ isotherm behaves too rigidly to be able to describe complicated sorption cases. The different possibilities of some other isotherms for such a purpose were displayed.