CN103404587B - Preparation method for kumquat fresh-keeping solution - Google Patents

Abstract

The invention provides a preparation method for a kumquat fresh-keeping solution. A main flow of the method comprises the following steps of: hydrolyzing fresh high-quality fish scales to obtain a collagen solution; adding nano titanium dioxide into the collagen solution; agitating sufficiently and uniformly to obtain a compound fresh-keeping solution. after kumquats are soaking into the compound fresh-keeping solution for several minutes and then taken out, one layer of a fresh-keeping film is formed on the surface and the formed fresh-keeping film is easy to wash; the fresh-keeping film is harmless to the human body after being ingested by a human body; ingested micro-molecular collagens are beneficial to the human body. The compound fresh-keeping solution provided by the invention is environment-friendly and safe, the preparation method is simple and feasible, and the fresh-keeping effect is good.

Description

A kind of preparation method of cumquat fresh-keeping liquid

Technical field

The present invention relates to fruit freshness preserving technology, be specifically related to a kind of preparation method of cumquat fresh-keeping liquid.

Background technology

Fruit and vegetable normally goes on the market with fresh and alive form, and nutritious, mouthfeel is suitable for, and is indispensable food during people live.Fresh fruit of vegetables, from gathering by human consumption, because self respiration and causal organism infect, has a large amount of fruits and vegetables to rot to lose every year.

Cumquat, belongs to Rutaceae, cumquat belongs to, and originates in China, so far the cultivation history of existing more than 1700 year, annual value of production more than hundred million yuan.Fruit is oval, golden yellow, glossy, and juice multi-flavor U.S. can eat by gross weight.Cumquat is not only attractive in appearance, and its fruit contains the composition such as abundant vitamin C, cumquat glucoside, can preventing curing cold, reducing blood fat, having certain effect to preventing the disease such as vascular sclerosis, hypertension.Suitable tracheitis, hepatitis, the edible for patients such as cholecystitis.

The storage of cumquat is more difficult, when cumquat just goes on the market also be this fruit be not easy store time, heat time cumquat easily there is large-area putrefactive phenomenon, be easy to frostbite again time cold.

At present, the most effective means controlling postharvest disease of fruits and vegetables be refrigeration in conjunction with chemical bactericide process, the antistaling agent of use is mainly the absorbent-type of representative with active carbon and take potassium permanganate as the large class of oxidation Decomposition type two of representative.Although the former removal rate is high, adsorb saturated after namely lost efficacy, even also have the danger of desorption; The bactericide sold in the market, major part is all toxic, and residue is harmful.Chemical bactericide is developed immunity to drugs, in the urgent need to studying harmless efficient corrosion resisting antistaling agent product and technology, with a large amount of uses of substituted chemistry bactericide because chemical bactericide remains harm humans healthy and phytopathogen.Therefore, find the biological way of keeping fresh of safety non-toxic, become the focus of people's concern for substituted chemistry preservation method.

Nano titanium oxide has very high chemical stability, heat endurance, Superhydrophilic, antibacterial ability, and completely can with Food Contact, nontoxic to human-body safety.

The fibre structure closely that collagen is natural, makes collagen-based materials demonstrate very strong toughness and intensity, is applicable to the preparation of membrane material.The existence of film can indirectly prevent the degraded of some composition in fruits and vegetables and become sour, and have that good resistance is moist, oxygen barrier, heat resistance and resistance to fat, also there is the effect of certain opposing microorganism invasion.It is also a kind of nutrition carrier simultaneously, can be converted into human body self collagen, play multiple effect: be as anti-aging, wrinkle resistant after being absorbed, and eliminates color spot, increases skin tension and elasticity, nourishes hair etc.

So far end sees that scale collagen-nano titanium oxide Multiple preservative solutions is applied to the fresh-keeping relevant report of cumquat.

Summary of the invention

The object of this invention is to provide a kind of preparation method being applicable to the Multiple preservative solutions of cumquat, this Multiple preservative solutions environmental protection, safety, preparation method's simple possible, good refreshing effect.

Realize step of the present invention as follows:

(1) with the fish scale of fresh high-quality as the raw material preparing hydrolytic collagen, the impurity on surface is removed in cleaning, adds fish scale weight 3-5 clean tap water doubly, boils 8-10 minute;

(2) add fish scale weight 4-6 0.2mol/L citric acid solution doubly by boiling the fish scale after process through step (1), add the papain of fish scale weight 1%-2%, at 35 DEG C-40 DEG C, stir hydrolysis 7-9 hour;

(3) solution after step (2) hydrolysis is boiled 8-10 minute, filter, collect the filtrate containing collagen;

(4) in the filtrate obtained through step (3), adding nano titanium oxide makes its percentage by weight reach 0.5%-1%, stirs and obtains Multiple preservative solutions.

Fish scale is turned waste into wealth by the present invention, collagen is extracted from fish scale, be equipped with nano titanium oxide, make Multiple preservative solutions, put into by cumquat to take out after fresh-keeping liquid infiltrates a few minutes and namely form one deck preservative film on surface, collagen component can suppress Cryogenic burns, combining nano titanium dioxide content, suppress fruit to rot, realize efficient fresh-keeping.

Composite fresh-keeping liquid and preparation method thereof of the present invention is simple, and fresh-keeping liquid film is easy to cleaning, even if human body is taken in, also can not be harmful, and the Small molecular collagen of absorption also can be useful to human body.

Detailed description of the invention

Embodiment 1

Get the fish scale 1000g of fresh high-quality, the impurity on surface is removed in cleaning, adding the running water of 3000g cleaning, boil 8 minutes, adding 0.2mol/L citric acid solution 4000g to boiling in the fish scale after process, add papain 10g again, stir hydrolysis at 35 DEG C-40 DEG C and boil 8 minutes after 8 hours, filter, collect the filtrate containing collagen, in filtrate, add nano titanium oxide 40g, stir and obtain Multiple preservative solutions.

Fresh-keeping contrast experiment of the present invention

Choose the ripe cumquat of 60 high-qualitys that mechanical is impaired, shape, size are close, clean, drain, every 30 one group.Optional one group as blank group, do not apply antistaling agent; Another group is put into take out after Multiple preservative solutions infiltrates 2min and is dried.Fresh keeping time 120 days.Comparing result sees the following form.

Claims (1)

1. a preparation method for cumquat fresh-keeping liquid, is characterized in that:

(1) with the fish scale of fresh high-quality as the raw material preparing hydrolytic collagen, the impurity on surface is removed in cleaning, adds fish scale weight 3-5 clean tap water doubly, boils 8-10 minute;

(2) add fish scale weight 4-6 0.2mol/L citric acid solution doubly by boiling the fish scale after process through step (1), add the papain of fish scale weight 1%-2%, at 35 DEG C-40 DEG C, stir hydrolysis 7-9 hour;

(3) solution after step (2) hydrolysis is boiled 8-10 minute, filter, collect the filtrate containing collagen;

(4) in the filtrate obtained through step (3), adding nano titanium oxide makes its percentage by weight reach 0.5%-1%, stirs and obtains Multiple preservative solutions.