Antioxidative activities in vitro of polyphenols from unripe apple pomace

The method of ferric reducing ability of plasma( FRAP),the scavenging ability of DPPH·,O-2·and ·OH were performed to assess antioxidative activities in vitro of polyphenols from unripe apple pomace.The results indicated that polyphenols from unripe apple pomace had an excellent total reducing power. When the concentration of unripe apple polyphone was 90μg / m L,the maximum scavenging rate on DPPH·,O-2·and ·OH was 96.96%,70.61% and 82.20%,respectively,which had a significant difference with VCand BHT. The significant correlation( p < 0.05) was found among the content of polyphenols,value of FRAP and scavenging rate of DPPH·,O-2·,·OH.The unripe apple polyphenol extracts was a kind of excellent natural antioxidants and free radical scavenger.