超临界CO2流体萃取制首乌中卵磷脂成分的正交试验研究

目的：通过正交试验，研究超临界CO2萃取制首乌中卵磷脂成分的最佳工艺条件。方法：以萃取压力、萃取温度、解析釜Ⅰ压力、解析釜Ⅰ温度为考察因素，用分光光度法测定不同试验条件下卵磷脂得率。结果：优选出最佳工艺条件为：萃取压力32MPa，萃取温度50℃，解析釜I压力为6MPa，解析釜Ⅰ温度55℃。结论：和传统提取工艺相比较，超临界CO2流体萃取工艺具有节约溶剂、工艺流程简单等优点，适用于工业化生产。

Study on Supercritical CO2 Extraction of Lecithin from Radix Polygoni Multiflori Preparata by Orthogonal Design

OBJECTIVE: To find out the optimal supercritical CO2 fluid extraction process for Radix Polygoni Multiflori Preparata, the extraction process was studied by orthogonal design with the yield of lectithin as index. METHODS: Four factors were chosen in this experiment, including extractor pressure, extractor temperature, separator I pressure and separator I temperature. The ultraviolet visible spectrophotometry was applied for the determination of lecithin in all different experimental conditions. RESULTS: The optimal supercritical CO2 fluid extraction process was: extractor pressure 32 MPa, extractor temperature 50 degrees C, separator I pressure 6 MPa and separator I temperature 55 degrees C. CONCLUSION: Compared with the traditional extraction methods, SFE-CO2 process has the predominance of saving solvent and shortening the technology process, which is exactly suitable for industralization manufacture.