CN103404587A - 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 the fruit freshness preserving technology, be specifically related to a kind of preparation method of cumquat fresh-keeping liquid.

Background technology

Fruit and vegetable using is normally with the listing of fresh and alive form, nutritious, mouthfeel is suitable, is indispensable food during people live.Fresh fruit of vegetables is from gathering by the human consumption, because self respiration and causal organism infect, the loss of rotting of a large amount of fruits and vegetables arranged every year.

Cumquat, belong to Rutaceae, cumquat genus, originates in China, has so far the cultivation history of more than 1700 year, and annual value of production is more than hundred million yuan.Fruit is oval, and golden yellow is glossy, but juice multi-flavor U.S. gross weight is edible.Cumquat is not only attractive in appearance, and its fruit contains the compositions such as abundant vitamin C, cumquat glucoside, can prevent curing cold, reducing blood fat, has certain effect to preventing the diseases 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, is also this fruit when being not easy to store, and in the time of heat, large-area putrefactive phenomenon easily appears in cumquat, in the time of cold, is easy to again frostbite.

At present, the effective means of controlling postharvest disease of fruits and vegetables is that refrigeration is processed in conjunction with chemical bactericide, and the antistaling agent used is mainly as the absorbent-type of representative with the oxidation Decomposition type two large class of potassium permanganate as representative with active carbon.Although it is high that the former removes rate, adsorb after saturated and namely lost efficacy, even also have the danger of desorption; The bactericide of selling in the market, major part is all toxic, and residue is harmful.Because the residual harm humans health of chemical bactericide and phytopathogen develop immunity to drugs to chemical bactericide, 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.Therefore, find the biological way of keeping fresh of safety non-toxic, become for the substituted chemistry preservation method focus that people pay close attention to.

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

The fibre structure closely that collagen is natural, make 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 anti-fat, also have the effect of certain opposing microorganism invasion.It is also a kind of nutrition carrier simultaneously, can be converted into the human body self collagen after being absorbed, and brings into play multiple effect: if anti-aging, wrinkle resistant, eliminate color spot, and increase skin tension and elasticity, nourish 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 purpose of this invention is to provide a kind of preparation method who is applicable to the Multiple preservative solutions of cumquat, this Multiple preservative solutions environmental protection, safety, preparation method's simple possible, good refreshing effect.

Realize that step of the present invention is as follows:

(1) with the fish scale of fresh high-quality as the raw material that prepare hydrolytic collagen, clean and remove surperficial impurity, add fish scale weight 3-5 clean tap water doubly, boil 8-10 minute;

(2) fish scale after step (1) boils processing is added to fish scale weight 4-6 0.2mol/L citric acid solution doubly, add the papain of fish scale weight 1%-2%, under 35 ℃-40 ℃, stir hydrolysis 7-9 hour;

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

(4) in the filtrate obtained through step (3), add nano titanium oxide to make its percentage by weight reach 0.5%-1%, stir and obtain Multiple preservative solutions.

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

Composite fresh-keeping liquid and preparation method thereof of the present invention is simple, and fresh-keeping liquid is filmed and is easy to clean, though the human body absorption, can be not harmful yet, the little molecule collagen of absorption also can be useful to human body.

The specific embodiment

Embodiment 1

Get the fish scale 1000g of fresh high-quality, surperficial impurity is removed in cleaning, the running water that adds the 3000g cleaning, boiled 8 minutes, adds 0.2mol/L citric acid solution 4000g in the fish scale boiled after processing, add again papain 10g, under 35 ℃-40 ℃, stir hydrolysis and boiled 8 minutes after 8 hours, filter, collect the filtrate that contains collagen, in filtrate, add nano titanium oxide 40g, stir and obtain Multiple preservative solutions.

Fresh-keeping contrast experiment of the present invention

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

Claims (1)

1. the preparation method of a cumquat fresh-keeping liquid is characterized in that:

(1) with the fish scale of fresh high-quality as the raw material that prepare hydrolytic collagen, clean and remove surperficial impurity, add fish scale weight 3-5 clean tap water doubly, boil 8-10 minute;

(2) fish scale after step (1) boils processing is added to fish scale weight 4-6 0.2mol/L citric acid solution doubly, add the papain of fish scale weight 1%-2%, under 35 ℃-40 ℃, stir hydrolysis 7-9 hour;

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

(4) in the filtrate obtained through step (3), add nano titanium oxide to make its percentage by weight reach 0.5%-1%, stir and obtain Multiple preservative solutions.