A Simple Method for Measuring Sorption of Flavor Compounds in Aqueous Solutions into Polyethylene Film

Abstract

A new method for measuring the solubility (sorption) [μg·cm^-3/ppm], diffusion [cmcm²/sec] and permeation coeffcients [μg·sec^-1·cm^-1/ppm] of volatile compounds in aqueous solutions into polyethylene (PE) film was established. The amount of a volatile compound permeating the PE film was detected by use of a flame ionization detector (FID) of gas chromatograph and a differential permeation curve was obtained. The diffusion and permeation coeffcients increased with increasing the concentration of the volatile compound, while the solubility coeffcient was unchanged. In the case of nethyl esters, the solubility coefficient increased about three-fold for each methylene group, but the increment was less in the esters composed of 10 or more carbon atoms.