STUDY ON EXTRACTION OF FLAVONOIDS FROM FRUIT OF ROSA DAVURICA PALL BY DIFFERENT METHODS AND ITS ANTIOXIDANT ACTIVITY

Lei Yong-ping, Di Song，Zhong Fang-li, Wang Xiao-lin and Zhang Lin

ABSTRACT:Taking the extraction yield of total flavonoids from fruit of Rosa davurica Pall. (FRDP) as index, the optimum extraction technology and in vitro antioxidant properties of flavonoid obtained from various modern extraction techniques were explored. The scavenging ability for DPPH· and ABTS+· of FRDP extracts were investigated. The extraction rate of flavonoids using microwave synergistic enzyme method was relatively higher than that of other extraction technique. The scavenging ability for DPPH· and ABTS were employed to evaluate the antioxidant activity of flavonoids, rutin and Vc. Results showed flavonoids had a strong scavenging ability for DPPH· and ABTS+·, and its scavenging activity gradually increased with the increasing mass concentration of flavonoids from FRDP.

Keywords:Fruit of Rosa davurica Pall., flavonoids, extraction technology, antioxidant activity.