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[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.
