The present study provides a comprehensive summary of the extraction and separation methods for flavonoids in Astragalus membranaceus.Various extraction techniques such as heating reflux,ultrasound-assisted extraction,and microwave-assisted extraction are discussed,along with separation methods including solvent partitioning,macroporous resin chromatography and high-speed counter-current chromatography.The advantages and disadvantages of these extraction and separation methods are reviewed.Furthermore,rational suggestions are proposed for the extraction and separation of flavonoids from Astragalus membranaceus to provide a sound theoretical basis for further research and application of this herb.
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