A method for preparing tuna skin gelatin

Abstract

The present invention discloses a method for preparing tuna skin gelatin, belonging to the technical field of fish resources utilization. According to the invention, skin tuna skin is subjected to pretreatment, degreasing, acid and alkali treatment, and then is subjected to gelatin extraction, and deodorization by filtering through activated carbon, and ion-exchange purification to remove heavy metal ions, and then concentration under vacuum and spray-drying to obtain finished products of tuna skin gelatin with quality meeting the edible gelatin standards specified in national standards. The tuna skin gelatin of the invention can be further processed for use and can be used in medicine, food and cosmetic industries, achieving the purposes of turning waste into treasure, and comprehensively and efficiently developing high value-added tuna by-products. The method of the invention has advantages of: 1, a scientific and reasonable process is adopted, the temperature in the reaction process is low and easy to control, which saves energy and controls the molecular weight of the skin gelatin in a relatively narrow range, and the quality of obtained gelatin is high; and 2, activated carbon is used for filtering for deodorization, improving the taste of the product.

Description

technical field

[0001] The invention relates to the field of comprehensive utilization of fish resources, in particular to a preparation method of tuna skin gelatin. Background technique

[0002] Tuna (Tunas) belongs to Perciformes Scombroids, also known as tuna and tuna. It is mainly distributed in low and mid-latitude sea areas, and is widely distributed in the Pacific Ocean, Atlantic Ocean, and Indian Ocean. It is also distributed in the East China Sea and South my country Sea, and belongs to oceanic warm water migratory fish. Tuna has the reputation of "the king of fish". The meat is tender and delicious, and it is not easy to be polluted by the environment. It is a rare healthy delicacy. The protein content of tuna is as high as more than 20%, but the fat content is very low, commonly known as "undersea chicken".

[0003] Tuna is an important resource of pelagic fisheries in the world. The output value of tuna in the world reaches 35 billion U.S. dollars, and it is on...