Optical characteristics of?-carotene films

Physical Properties of Carotenoids in the Solid State

“…Since the molar extinction coefficient at 450 nm of in a nhexane solution is 139000 (Tsukida et al, 1982), the number of molecules which occupy the unit area in the film can be determined by dissolving the film into n-hexane and by measuring its optical density. Therefore, we can determine the density of the film which is in good agreement with the earlier report by Babaev and Al'perovich (1973) …”