Study on Extraction of Natural Black Soya Bean Peptide and Antioxidant Activity

With black beans as raw materials, different factors on natural black beans peptide yield influence, and through the establishment of DPPH • system, OH • system, reducing power system measurement for the determination of different concentration of black soya bean peptide oxidation stability. The results showed that the liquid material ratio 17.5,leaching 42°C,extracting 55 min, black beans peptide extraction is 2.386 mg/g. Black beans peptide in various system all have certain oxidative stability, in the concentration of 0.04mg/ml to 74.05% clearance of DPPH• , in 0.06mg/ml concentration of OH•clearance rate is 80.48%, 0.08 mg/ml concentrations reduction force is 0.745, and in these three system natural black beans peptide oxidation stability are better than those of contrast VC is strong .