Total flavonoids and total phenol content and their antioxidant activities of fern Adiantum flabellulatum

The contents of total flavonoids and total phenol of fern Adiantum flabellulatum L. were determined. The DPPH and ABTS free radical scavenging activities and Fe reduction force were determined and analyzed as well. The results showed:1) The total flavonoid content of A. flabellulatum ranged from 6%~8%,while the total phenol contents ranged from 7%~14%. Total flavonoid and total phenol contents in subterranean parts were both higher than those in aerial parts. And total flavonoid and total phenol contents were different for material from different localities;2) The extracts from A. flabellulatum have certain ferric reducing ability of plasma and DPPH and ABTS radicals scavenging activities. And ABTS scavenging activity and ferric reducing ability of plasma both strengthen along with the increasing of concentration of total flavonoids and total phenol respectively.