超临界CO2流体与有机溶剂提取茶树籽油的理化性质比较GC-MS . Comparison of Physicochemical Properties of Tea Seed Oil Extracted with SFE and Organic Solvent

Abstract

The fatty acid composition of tea seed oils obtained by organic solvent extraction and supercritical carbon dioxide extraction was analyzed by GC-MS and their main physiochemical properties were measured. After dry-heat treatment at 100 ℃ for different hours, the changes in acid value and peroxide value were also determined. The tea seed oil obtained by supercritical carbon dioxide extraction had higher iodine value and lower peroxide value and acid compared to the tea seed oil obtained by organic solvent extraction. Moreover, the former showed higher unsaturated fatty acid content. However, both tea seed oils exhibited a good antioxidant capacity