A kind of selenium-enriched tuna bone collagen peptide and preparation method thereof

Abstract

A selenium-enriched tuna bone collagen peptide and a preparation method thereof belong to the field of functional polypeptides. The raw tuna bone is broken and cleaned, soaked in a dilute hydrochloric acid solution, and washed with water until the pH value is 2‑6 to obtain selenium-enriched tuna bone collagen. After pyrolysis at 60-90°C for 2-6 hours, adjust the pH of the solution and add protease for enzymatic hydrolysis for 2-6 hours, then inactivate the solution, decolorize, deodorize, filter and dry the solution to obtain selenium-enriched tuna bone collagen peptide. The selenium content in the selenium-enriched tuna collagen protein peptide prepared according to this method is 2-2.63mg / kg, which reaches the national standard for selenium content, and contains trace elements such as calcium, magnesium, zinc, etc., and the purity of the selenium-enriched tuna bone collagen peptide is 93.7 %, ash content ≤ 3%, anti-oxidation IC measured by ABTS method 50 The value is 0.5‑1 mg / ml.

Description

technical field

[0001] The invention relates to a selenium-enriched tuna bone collagen peptide and a preparation method thereof, belonging to the field of functional polypeptides. Background technique

[0002] As a deep-sea fish, tuna not only has delicious meat and high nutritional value, but also is far away from offshore pollution, avoiding the troubles of antibiotics and hormones of collagen peptides from farmed fish. Tuna is generally processed into sashimi or canned products, and about 60% of the leftovers are produced during the processing process. These leftovers include fish heads, fish bones, fish skins, viscera, etc., and are mostly used for processing into fish meal as animal feed. However, during the fishmeal processing process, odor and a large amount of sewage will be discharged, causing environmental pollution. Processing fish bones into collagen peptides increases the added value of tuna products and solves the problem of environmental pollution at the same...