CN101999439A - Purely-natural aquatic product preservative preparation method - Google Patents

Abstract

The invention belongs to the field of aquatic product preservation, in particular to a purely-natural aquatic product preservative preparation method, which is to prepare the preservative by preparing high-quality ginger extract and solution of chitosan, adding high-quality ginger extract into 95 percent food grade ethanol, dissolving, adding solution of chitosan and uniformly mixing. In the invention, the purely-natural biological preservative is prepared by combining high-quality ginger and chitosan, wherein the high-quality ginger has broad antibacterial and anti-lipoxidation effects; and the chitosan molecular structure has high-activity functional groups, shows similar characteristics with antibiotic and has high antibiotic and antiviral performance. With the two kinds of characteristics, the preservative has a good fruit preservation effect, and particularly when used in light-degree freezing and normal-temperature preservation, can greatly prolong the preservation and storage period.

Description

A kind of preparation method of pure natural aquatic product fresh keeping agent

Technical field

The invention belongs to the fresh-keeping field of aquatic products, particularly a kind of preparation method of pure natural aquatic product fresh keeping agent.

Background technology

The flesh of fish contains rich in protein and multiple unrighted acid, and fat oxidation and microbial growth easily take place in the process of preserving the moisture height, is under general condition very easily decomposed by the corruptibility microorganism and goes bad.Preservation of fishery always is one of principal element of restriction aquatic products industry development.At present, it is fresh-keeping etc. that preservation of fishery technology commonly used both at home and abroad mainly contains preservation by low temperature, fresh chemically, controlled atmosphere and irradiation.The cost costliness of physical fresh-keeping method, limitation are big, along with the raising of people's environmental consciousness and the development of preservation technique, the security of fresh chemically also causes people's worry gradually, some bio-preservatives with Nantural non-toxic are that the biological way of keeping fresh that raw material carries out causes people's attention gradually, and begin to be applied in processing, storage, transportation and the process of consumption of aquatic products.The natural biological antistaling agent carries out the fresh-keeping harmful effect that can reduce the chemical synthesis bactericide to human health to aquatic products, and effectively prevents the resistance to the action of a drug of pathogen.Being considered to the most promising developing direction of food additives research field, is the important channel of the efficient seafood biological antiseptic preservative of development of new.

The objective of the invention is provides a kind of preparation method of pure natural aquatic product fresh keeping agent in order to overcome the deficiency that prior art exists.

For achieving the above object, the technical scheme that the present invention takes is the preparation method of this pure natural aquatic product fresh keeping agent, step by the following method:

(1) preparation galangal rhizome extract

Galangal is cleaned, section, 60 ℃～65 ℃ oven dry, pulverized 80 mesh sieves, it is 95% food grade ethanol that the ratio that is g/ml in 1: 5 unit in the galangal powder adds concentration, places the ultrasonic cleaning machine, 50 ℃～55 ℃ of temperature, 1～1.5 hour time, low frequency ultrasound assisted extraction galangal active material, suction filtration, it is 95% food grade ethanol that the ratio that filter residue is g/ml in 1: 2.5 unit adds concentration, repeats above-mentioned steps twice, merging filtrate, solvent evaporated gets galangal rhizome extract;

(2) preparation chitosan solution

Get the food-grade shitosan, with the food-grade acetic acid solution dissolving of concentration 1% (v/v), making concentration is 1% (g/v) chitosan solution;

(3) preparation antistaling agent

It is 95% food grade ethanol that the ratio that is g/ml in 1: 10 unit in step (1) gained galangal rhizome extract adds concentration, and dissolving is that 3～7: 93～97 ratio adds step (2) gained chitosan solution by volume, mixes, and makes antistaling agent.

The present invention adopts the galangal recombination chitosan to make the pure-natural biological antistaling agent.Galangal has the antibacterial of wide spectrum and lipotropism matter oxidation; Contain highly active functional group in the chitosan molecule structure, show similar antibiotic characteristic, have the performance of good antibiotic, antiviral microorganism.Comprehensive above-mentioned two specific characters of this antistaling agent have good effect to preservation of fishery, especially are applied to little freezing and normal-temperature fresh-keeping, can prolong the fresh-retaining preserving phase greatly.

The specific embodiment

The preparation method of pure natural aquatic product fresh keeping agent, according to the following steps:

1, preparation galangal rhizome extract: galangal is cleaned, section, and 80 mesh sieves were pulverized in 60 ℃ of oven dry.Take by weighing 50 gram galangal powder, adding 250 ml concns is 95% food grade ethanol, places the ultrasonic cleaning machine, 50 ℃ of temperature, 1 hour time, low frequency ultrasound assisted extraction galangal active material, suction filtration, filter residue are 95% food grade ethanol with 125 ml concns respectively, repeat twice of above-mentioned steps, merging filtrate, solvent evaporated can get about galangal rhizome extract 10 grams.

2, preparation chitosan solution: taking by weighing the food-grade shitosan, is the dissolving of 1% food-grade acetic acid solution with concentration, makes 1% chitosan solution.

3, preparation pure-natural biological antistaling agent: taking by weighing 2 gram galangal rhizome extracts, to add 20 ml concns be 95% food grade ethanol, dissolving; Get 500 milliliters of chitosan solutions again, both mix, and can make antistaling agent.

Using method:

The aquatic products that needs are fresh-keeping clean up, and drain away the water, and get final product above then antistaling agent evenly being sprayed at.Under refrigeration or normal temperature, can prolong storage period about one times time.

Claims (1)

1. the preparation method of a pure natural aquatic product fresh keeping agent is characterized in that step by the following method:

(1) preparation galangal rhizome extract

Galangal is cleaned, section, 60 ℃～65 ℃ oven dry, pulverized 80 mesh sieves, it is 95% food grade ethanol that the ratio that is g/ml in 1: 5 unit in the galangal powder adds concentration, places the ultrasonic cleaning machine, 50 ℃～55 ℃ of temperature, 1～1.5 hour time, low frequency ultrasound assisted extraction galangal active material, suction filtration, it is 95% food grade ethanol that the ratio that filter residue is g/ml in 1: 2.5 unit adds concentration, repeats above-mentioned steps twice, merging filtrate, solvent evaporated gets galangal rhizome extract;

(2) preparation chitosan solution

Get the food-grade shitosan, with the food-grade acetic acid solution dissolving of concentration 1%, making concentration is 1% chitosan solution;

(3) preparation antistaling agent

It is 95% food grade ethanol that the ratio that is g/ml in 1: 10 unit in step (1) gained galangal rhizome extract adds concentration, and dissolving is that 3～7: 93～97 ratio adds step (2) gained chitosan solution by volume, mixes, and makes antistaling agent.