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영어

Antioxidant extracts containing various polyphenol compounds such as resveratrol were prepared from the grape’s twig to be used as a functional additive for cosmetics. Extraction was performed using 80% ethanol in ultrasonic extractor for 60 min. The crude extract was
purified up to 99% after elution through silica gel open column chromatography. The stability of the purified resveratrol was as follows: a half life of 60 days at 40°C and 90 days at 25°C. A sensory test of the commercial grape juice with 1 to 10 ppm of purified resveratrol showed better preference than the grape juice without it. Color and smell test showed no difference between two samples. Using the extract, we have made a cosmetic product and performed sensory test. The grape twig can be used as a valuable resource for the extraction of resveratrol and the fraction with it.