Flavonoids were manufactured from bamboo saw -dusts by means of ethanol extraction and flash extraction device respectively. Results showed ethanol extraction of preferential process： ethanol concentration 50%, extraction temperature 80 ℃, solid - liquid ratio 1：20 and extraction times 4h obtain 4. 970mg/g flavonoids content. The flash type extraction of preferential process： ethanol concentration 50% ,solid -liquid ratio 1：45 and extraction times 180s obtain 3. 943mg/g flavonoids content. It turns out that ethanol extraction is better than flash extraction.
bamboo sawdustethanol extractionflash type extractionflavonoids
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