7Cao G, Prior R L. Measurement of oxygen radical absorbance capacity in biological samples[ J] .Methods in Enzymology, 1999, 299:50-62.
8Awika J M ,Rooney L W,Wu X L,et al.Screening methods to measure antioxidant activity of Sorghum (Sorghum bicolor ) and Sorghum products [ J]. Journal of Agricultural and Food Chemistry,2003,51:6657-6662.
9Lingrong W, Lianzhu L, Lijun Y, et al.Uhrasound- assited extraction and structural identification of polysaccharides from Isodon lophanthoides var. gerardianus ( Bentham ) H Hara [ J ] . Carbohydrate Polymers, 2011,85 ( 3 ) :541-547.
10Blois M S. Antioxidant determinations by the use of a stable free radical[ J] .Nature, 1958,181 : 1199-1200.