关键词:桂花;超临界萃取;黄酮类化合物;乙醇提取法;
Abstract:Osmanthus Fragrans`s cultivation in China has 2,500 years of cultural history.The study of osmanthus Fragrans aromatic components began in the 1960s, people ususlly paid attention on osmanthus Fragrans`s concrete or oil when they studied the osmanthus Fragrans`s aromatic ingredients. It also has high ornamental value, the value of food and the medicinal value. Therefore, Osmanthus Fragrans has a very broad market prospects.In this paper ,there are several preservation methods of Osmanthus Fragrans and the experiment by using supercritical carbon dioxide extraction of Osmanthus Fragrans concrete and explore its operating pressure, temperature and time on the Osmanthus Fragrans concrete extract rate of extraction. The experimental results showed that the proper conditions or extract of Osmanthus Fragrans concrete are:pressure 14 Mpa,temperature 40℃ ,time 4 hours. By means of the methods of ethanol-extracting,the optimum extraction conditions of flavonoids in Osmanthus Fragrans`s slag were determined.The optimum conditions of ethanol-extracting were obtained as follows:70% ethanol as extraction solvent at 75℃ for 3 hours.
Keywords: Osmanthus Fragrans; supercritical carbon dioxide extraction; Flavonoids; ethanol-extracting;