DERIVATION OF THERMODYNAMIC SORPTION EQUATION OF FLAVORS WITH PACKAGING FILMS .1.

The sorption equation of flavors with packaging film to extend for var ious flavors and polymers was derived by improving the proposed delta( c) concept. On the basis of the findings that the sorptions depend on both the delta(c) values between film and flavors with similar chemica l potential and their molar heat of vaporization (Delta H-vap), the fo llowing thermodynamic sorption equation was derived: S = S-o exp gamma [V-v(delta(v)(2) - delta(c)(2))/RT]. For aqueous phase the plots of In S vs the term of the equation gave an adequate but insufficient relat ionship (r = 0.802), resulting from the influence of any interaction f orce from solution on the magnitudes of physical adsorption and conden sation of flavors on film surface. On the other hand, for vapor phase the same plots gave a quite sufficient correlation (r = 0.967). Theref ore, in the prediction of the sorption behaviors for vapor phase the d erived sorption equation may be more useful and effective.