In this study,peanut peptide ferrous chelates were prepared by reacting peanut protein with FeCl2·4H2O,the main index was the ferrous ion chelating rate,and the auxiliary index was the yield of peanut peptide ferrous chelates.On the basis of the one-way experiments,Box-Behnken response surface analysis was used to investigate the effects of pH,temperature,time,and peptide-iron mass ratio on the chelating rate so as to screen the optimal process for the preparation of peanut peptide ferrous chelates.The optimal process for the preparation of ferrous ion chelates was selected.The results showed that when the pH value was 7.0,the chelating temperature was 35℃,the chelating time was 30 min,and the mass ratio of peptide to iron was 4∶1,the chelating rate was the highest,which was 65.09%.
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