The antioxidant capacity of apple skin was determined by using the 2,2-diphenyl -1-picrylhydrazyl (DPPH·) radical scavenging method which is simple,quick and stable. It has been approved that apple extracts has stronger scavenging abilities of DPPH·. Antioxidant activity of the water-soluble extracts was stronger than that of lipid soluble. This confirmed that there were many different kinds of antioxidants with different polarity in apple. The radical scavenging ability of shine-exposed side of apple is st...