Analysis of the correlations between antioxidant properties and the regular index of malt

In this paper six antioxidant indexes of seven malt varities and barley was compared and the relation between the antioxidant index and the regular index of malt was researched by the correlation analysis and principal component analysis. The results indicated after barley was made into malt,the activity of lipidoxidase reduced significantly,the activity of ABTS radical scavenging and reducing power increased significantly. Except domestic barley,the catalase activity of other barley varities increased significantly; the activity of DPPH radical scavenging and total polyphenol had no obvious difference except individual varity. The principal component analysis and correlation analysis showed that the antioxidant index such as DPPH,ABTS,reducing power,total polyphenol and lipidoxidase and the regular index such as total acid,diastatic power,total protein,soluble protein,free α- AN,friability and β- glucans had a significant correlation( p < 0.01),and the correlation between the catalase activity and color and β- glucans were significant( p < 0.05).