FOOD SCIENCE ›› 2004, Vol. 25 ›› Issue (2): 117-120.

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Extraction of Oligomeric Proanthocyanidins from Grape Seeds

 ZHAO  Wen-Jun, WU  Xue-Ping, WANG  Xu   

  1. Xinjiang Institute of Physical and Chemical Technology, Chinese Academy of Science
  • Online:2004-02-15 Published:2011-10-24

Abstract: The extraction of oligomeric proanthocyanidins(OPC) from grape seeds was studied in this paper. Some factors,including extracting time, extracting temperature and the concentration of phosphoric acid were studied. The optimal conditionswere: ethylacetate-water containing 3% phosphoric acid and stirring at room temperature for ten hours. The yield of oligomericproanthocyanidins was more than 2.0% and the polyphenolic content more than 70%. The sample was grayish and showed goodwater solubility.

Key words: grape seeds, extraction, oligomeric proanthocyanidins, total polyphenolic content