Method for producing collagen peptide by using cod skin as raw material

Abstract

The invention belongs to the technical field of collagen peptide preparation, and particularly relates to a method for producing collagen peptide by using cod skin as a raw material. The method comprises the following steps: cleaning cod skin, adding a gradient sodium chloride- citric acid aqueous solution, stirring and soaking, dropwise adding a calcium bicarbonate aqueous solution, continuouslysoaking, filtering after soaking, cleaning the cod skin with deionized water, airing the surface moisture of the cod skin, adding an acetic acid solution and sodium alginate, swelling, pulping, adjusting the pH value, obtaining fish skin pulp for later use; and adding papain and squalene into the fish skin pulp, carrying out enzymolysis, carrying out enzyme deactivation after the enzymolysis is finished, centrifuging, taking the supernatant, carrying out ultrafiltration on the supernatant, and carrying out freeze drying. According to the extraction method provided by the invention, the collagen body yield can be increased, the extracted collagen peptide is high in purity, uniform in molecular weight distribution, high in oxidation resistance and free of peculiar smell, the bitter and fishysmell of the collagen peptide prepared from aquatic products is reduced to the maximum extent, and the enzymolysis time is greatly shortened.

Description

technical field [0001] The invention belongs to the technical field of preparation of collagen peptides, and in particular relates to a method for producing collagen peptides from cod skin raw materials. Background technique [0002] Collagen is a structural protein of many connective tissues, and its content reaches more than 30% in mammalian proteins. Collagen peptides are enzymatic products of collagen, which are easily absorbed in the form of small peptides and free amino acids. Animal experiments have confirmed that After ingesting radioactive collagen peptides, radioactivity was detected in tissues such as femur, tibia, joints, and muscles, indicating that to a certain extent, collagen peptides participated in the growth and synthesis of the above tissues, and clinical studies have proved that collagen peptides can promote Bone and joint health, relieve pain caused by exercise, improve sarcopenia, promote wound healing, etc., suitable for sports nutrition food. [000...

AI Technical Summary

Problems solved by technology

However, the collagen peptides in my country are in the primary stage, and the collagen peptide products extracted from aquatic products are prone to produce unpleasant fishy smell, and the color is deep, the molecular weight distribution of peptides is not concentrated, and the extraction rate is low.

In the prior art, activated carbon is mostly used for odor adsorption, but this method is not thorough for odor adsorption, and the protein loss rate is high