Extraction and Fatty Acid Composition Analysis of Cabernet Sauvignon Grape Seed Oil

Cabernet Sauvignon grape seeds were picked out of grape pomace,the residue left after wine making,and extracted by Soxhlet extraction method separately using different solvents,petroleum ether,n-hexane and ether,to obtain grape seed oils.The seed oils were analyzed by GC-MS for fatty acid composition.The highest extraction efficiency(15.59%) was achieved by using petroleum ether.A total of 22 fatty acids were detected simultaneously in all the solvent extracts,among which linoleic acid,palmitic acid and stearic acid were dominant showing a significant difference in their amounts.The relative content of linoleic acid in the either extract was 80.83%,which was 3.75% higher than in the petroleum ether extract.These data suggest that the fatty acid composition of grape seed oil varies depending on the extraction solvent and the major fatty acids in seed oils extracted with different solvents are the same but in different amounts.