METHOD FOR PRODUCTION OF GRAPE SEED EXTRACT HAVING NATURAL ANTIOXIDANT FUNCTION

摘要

PURPOSE: A process of preparing the titled grape seed extract by subjecting waste grape seed powder to pretreatment such as boiling treatment and heat treatment with ultrahigh frequency waves to increase solubility of natural antioxidant components to a solvent is provided, thereby effectively producing proanthocyanidin having antioxidant components. CONSTITUTION: Grape seeds are heated with hot air at 60deg.C and ground to a size of about 60 mesh, followed by boiling with two times of purified water for 3 hr. The boiled grape seed powder is heated with ultrahigh frequency waves of 2,450MHz and extracted with spirits in an extractor with a reflux cooler in the first stage, followed by extracting with spirits in the second stage. All the extracts are washed with the same weight of hexane to remove fat, filtered under reduced pressure until the extracts attain 25 Brix or more and freeze-dried after removing the extraction solvent.