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Identification of Polyphenols from Unripe Apple with Viscozyme L Extraction

Agricultural Biotechnology 2019年第2期8卷 153-156页

作者： Huzhe ZHENG Chunlan CUI Shinkyo CHUNG Department of Food Science Jiangsu Food & Pharmaceutical Science College Department of Food Science and Technology Kyungpook National University

As a potential source of fine chemicals, unripe apple polyphenols were extracted with Viscozyme L treatment. And then, a preparative moderate pressure liquid chromatography(MPLC) method for separation and purification of polyphenols were successfully established by using silica gel column and octadesyl silane column. The structures of these compounds were identified by ~1H and ^(13)C NMR spectroscopy. The results indicated that Viscozyme L had the strongest effect on polyphenols extraction, the yield of apple crude polyphenols(ACP) was 7.08%, and the total phenolic content(TPC) of ACP was 0.95 g GAE/100 g, which were 2 times of that of control; 5 sub-fractions were obtained from ACP, which were A-1, A-2, and B-1, B-2, B-3; fractions A-2 and B-2 were identified as p-coumaric acid and caffeic acid and the yields were 111.54 and 161.70 mg/100 g ACP, respectively. In addition, p-coumaric acid and caffeic acid were the major components in Viscozyme L-aided polyphenols extraction, which could be explained by the result of degradation of lignin and chlorogenic acid by carbohydrate-hydrolyzing enzyme, Viscozyme L.

关键词： Unripe apple polyphenole Viscozyme L Identification p -coumaric acid Caffeic acid

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