Effect of drying methods on extraction of lycopene in tomato skin with supercritical carbon dioxide

摘要

Lycopene is one of the naturally occurring carotenoids, which owes its red color attributable to the presence of an extensively conjugated polyene structure. Such a structure renders lycopene susceptible to oxidation. Extraction of lycopene in tomato skin was studied with supercritical carbon dioxide (SD-CO_2). The recovery ratio of lycopene differed according to drying methods. After being dried each tomato skin by hot-air-drying, freeze-drying or dehydration with ethanol, lycopene was extracted using SC-CO_2 (100 approx 270 kg/cm~2, 35 approx 60 deg C). In the case of dehydration with ethanol, the recovery ratio of lycopene was the highest (about 90%). The recovery ratio of lycopene increased with an increase in pressure and was the highest at 40 deg C.