8KENNEDY J A,MUNRO M H G, POWELL H K J,et al.The protonation reaction of catechin,epicatechin and related compounds [J].Aust J Chem, 1984,37 (5) :885-892.
9KENNEDY J A,KIPTONH. Polyphenol interactions with aluminum ( Ⅲ )and iron ( Ⅱ ):Their possible in- volvement in the complexation process [J] .Aust J Chem, 1985,38(2):879-888.