Rice peptide and preparation method thereof, and rice peptide chelate and preparation method thereof

The invention relates to the field of food processing, and particularly discloses a rice peptide and a preparation method thereof, and a rice peptide chelate and a preparation method thereof. The preparation method of the rice peptide comprises the following steps: S1, mixing rice residue crude protein with water to obtain a first mixed system; s2, adding high-temperature amylase into the first mixed system, reacting, filtering, and retaining filtrate; s3, taking the filtrate, adding water again, and dissolving to obtain a second mixed system; s4, adding endo-protease and exo-protease into the second mixed system, and reacting to obtain a crude product; and S5, heating the crude product for enzyme deactivation, filtering, retaining supernate, concentrating and drying to obtain the rice peptide. The rice peptide can be further chelated with microelements to obtain the rice peptide chelate, and the rice peptide chelate has the advantages of being high in chelating rate and good in chelating stability. 本申请涉及食品加工