1996 Volume 2 Issue 1 Pages 65-71
An experimental study has been carried out on the binary adsorption equilibria of various flavors and water for typical materials used in a box of a tobacco product. A flavor component of L-menthol, which was sublimated from the solid state, was found to be adsorbed onto the surfaces of each material without phase re-transition under its unsaturated condition. For tobaccos, papers and filters, flavors with a water soluble or polar nature were adsorbed to a greater degree than otherwise, while for the activated carbons, this dependence showed the opposite tendency except for L-menthol. These behaviors of the binary adsorption equilibria of various flavors and water are explained as follows; (a) for the tobacco and paper, the flavors were mainly adsorbed by the solution in the adsorbed water, and to some extent, on the hydrophobic sites of the material's surface, (b) for the filter, they were adsorbed on the hydrophobic sites such as the acetyl group inside the tow, (c) for activated carbon, their adsorption was attributed to the filling of flavor molecules in the inner surface of the micropores, but depended on their size.
