Influence of acid soaking on antioxidant of extraction from sesame coat

The antioxidative activity of sesame coat extraction were increased after being soaked with hydrochloric acid in certain acid concentration,soaking temperature and time. On the basis of single-factor experiments,an orthogonal experiment was carried out.According to the orthogonal experiment,the best acid soaking technological condition was obtained.When using0.35 mol/L of hydrochloric acid,soaking procedure conducted for 1.5 h with temperature of 70 ℃,and material-liquid ratio of1∶10,the free radical scavenging capacities of extraction to 2,2-diphenyl-1-picrylhydrazyl radical( DPPH·) was 86.35%.However,at the same concentration of extraction from no acid soaking sesame coat,the free radical scavenging capacities of extraction to 2,2-diphenyl-1-picrylhydrazyl radical( DPPH·) was just 32.27%. The conclusion is that acid soaking sesame coat can increase the antioxidation of lignans.