Abstract: The flavonoids which is a strong antioxidants widely is found in certain plants and berries in nature. It can effectively remove the internal oxygen free radicals. Taraxacrm mongolicum Hand.-Mazz were carried out under optimum extraction conditions which is ethanol solvent 58%, 65℃, ratio of material to liquid 1:20, 52min each time. Four evaluation methods of antioxidants in vitro such as superoxide anion radical scavenging method, DPPH·method, colorimetric reaction of hydroxyl free radical in Fenton and the elimination of hydrogen peroxide were used to evaluate the antioxidant activities of extracts of flavonoids in Taraxacrm mongolicum Hand.-Mazz while the VC were used as positive control. The results showed that the flavonoids in Taraxacrm mongolicum Hand.-Mazz had some scavenging ability on all radical, but there are some differences clearance. The amount of flavonoids in Taraxacrm mongolicum Hand.-Mazz used was in direct proportion to the antioxidation. Conclusion: The flavonoids in Taraxacrm mongolicum Hand.-Mazz had remarkable in vitro antioxidant activity.
Keywords: Taraxacum mongolicum Hand.-Mazz; Flavonoids; Extraction;
Antioxidant activity; Scavenging free radicals