Optimization of Reparation for Antioxidant Peptide from Potato Protein Powder by Protamex

Antioxidant peptide was prepared by hydrolyzing potato protein powder with Protamex.With total antioxidant capacity as the indicator，the optimal technology was performed by means of Box-Behnken design.Results indicated that the optimal prepared technical parameters were obtained as follows：substrate concentration of 5％，enzyme dosage 4 000 Ug，enzymolysis time 165 min.Under the above mentioned conditions，the total antioxidant capacity was 0.751 mmolL.Experiment result was consistent with the prediction result.