4Wood Jacqueline E,Senthilmohan Senti T,Peskin Alexander V.Antioxidant activity of procyanidin-containing plant extracts at different pH[J]. Food Chemistry,2002,77(2):155～161.
5David M1M,Malcom R S. Analyst[J],1994,119(5):863～868.
6Tosiko S, Akio Y,Tomomasa K.Agricultural and Food Chemistry [J],1999,47(7):2885～2890.
7Yanagida A,Kanda T S,et al. Chromatography A[J], 1999,855(1):181～190.
8Polter L, Hrstich L,Chan B. Phytochemistry[J],1986,25:223～230.
9Burns,R E. Methods of tannin analysis for forage crop evaluation Georgia Agric. Exp Stn Tech Bull N S,1963,32:5.
10Bate-Smith,EC, Lerner, N H,Leuco-anthocyanin. A systematic distribution of leuco-anthoicyanins in leaves. Biochem[J].1964,58:126.
