In order to make use of the resources of taraxacum mongolicum hand-mazz,and avoid wasting,the extrac-tion of total flavanone of taraxacum mongolicum hand-mazz and its effects on scavenging of hydroxyl radicals were studied.The flavonids were extracted by ethanol as the solvent from taraxacum mongolicum gand-mazz with ultrasonic wave and ethanol extraction.Using spectrophotometry,the flavanone oftaraxacum mongolicum hand-mazz was extracted and checked.The effect of extracts on taraxacum mongolicum hand-mazz ...