CN104322650A - Coating preservation method of pseudosciaena crocea - Google Patents
Coating preservation method of pseudosciaena crocea Download PDFInfo
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Abstract
The invention dislcoses a coating preservation method of pseudosciaena crocea. The method includes following steps: (1) pre-treatment; (2) a soaking process; (3) a film-forming process; and (4) a packaging and refrigerating process. In the method, a sodium bicarbonate solution with a mass percentage concentration being 0.5-1% is employed for washing the pseudosciaena crocea, a composite film-forming preservative agent is developed on the basis of biochemical characteristics of the pseudosciaena crocea and an air-drying film-forming operation is carried out through cold air. The coating preservation method in operation process, is less in equipment investment, is environmentally-protective and safe, is suitable for industrialized production and can greatly prolong a preserving time of the pseudosciaena crocea on the premise of ensuring an edible quality and a sensory quality of the pseudosciaena crocea. The method is significant in preserving effect and is high in film-forming efficiency.
Description
Technical field
The present invention relates to a kind of aquatic products technical field of preservation of fresh, especially relate to a kind of large yellow croaker coating preservation method.
Background technology
Large yellow croaker, has another name called yellow croaker, Cymbaria dahurica fish etc., is tradition one of four large marine products, is the main economic fish of China.Large yellow croaker is rich in the nutritional labeling such as protein and fat, due to its high-moisture, high-fat feature, makes the flesh of fish very easily putrid and deteriorated.In fish body, the factor such as autolytic enzyme reaction, microbial reproduction, fat oxidation, external source pollution all can cause flesh quality deterioration, produces bad smell, causes the decline of fish body organoleptic quality.Therefore, the preservation method of large yellow croaker is just seemed extremely important.
Coating-film fresh-keeping method at present popular carries out fresh-keeping new technology to food both at home and abroad, its with large biological molecule (as polysaccharide, protein and lipid etc.) for raw material, the film that the one deck being covered in food surface or inside by forms such as parcel, dipping, coating, sprinklings is made up of edibility material, reduce germ contamination, stop growth of microorganism, weaken air oxidation, slow down lipid oxidation rates, thus can keep the freshness of fish, moisture and local flavor better.
Authorization Notice No. CN102960420B, the Chinese patent of authorized announcement date 2014.03.05 discloses large yellow croaker coating preservation method, and with trash ice by large yellow croaker inactivation, with the normal saline washing of 20 ~ 30%, garlic section applies on fish body, dries stand-by; The fresh-keeping liquid that mass percentage concentration is 5 ~ 10% is made into the Celery extract that purity is 80 ~ 90%; Flood and pull out after 3 ~ 5min minute; Take out with calcium chloride solution gel 3 ~ 5min, clear water rinsing, drains, and vacuum packaging is placed in-10 ~ 0 DEG C of refrigerator and preserves again.Its weak point is, effectively can not wash away the mucus on large yellow croaker surface, be unfavorable for film forming with salt solution; Adopt garlic section coating, be coated on fish body by garlic juice, dry stand-by, operating procedure is loaded down with trivial details, is not suitable for suitability for industrialized production; Celery only has the effect of scavenging free radicals (anti-oxidant), effectively can not suppress the activity of autolytic enzyme and maintain the color and luster of large yellow croaker body surface, limited use and single; Making film forming matter gel by spraying calcium chloride solution, adding operating procedure and cost.
Summary of the invention
The present invention is that the operating procedure existing for the large yellow croaker coating preservation method in order to solve prior art is loaded down with trivial details, the problem of large yellow croaker fresh-keeping effect difference, provide a kind of operating procedure simple, equipment investment is few, Environmental Safety, be applicable to suitability for industrialized production, the large yellow croaker coating preservation method of large yellow croaker freshness date can be significantly improved.
To achieve these goals, the present invention is by the following technical solutions:
A kind of large yellow croaker coating preservation method, comprises the following steps:
(1) pretreatment: by fresh and alive large yellow croaker with after death freezing, cleans with the sodium bicarbonate solution that mass percentage concentration is 0.5 ~ 1%, drains.The present invention adopt mass percentage concentration be 0.5 ~ 1% sodium bicarbonate solution large yellow croaker is cleaned, effectively to remove the mucus on large yellow croaker surface, being convenient to active principle in follow-up immersion process fully infiltrates in fish body, in follow-up film forming procedure, be conducive to fish surface film forming simultaneously, sodium bicarbonate solution concentration is unsuitable excessive, otherwise can affect the local flavor of large yellow croaker.
(2) soak: large yellow croaker is placed in after film-forming fresh-preserving agent soaks 20 ~ 30min under vacuum and takes out, described film-forming fresh-preserving agent is made up of the component of following mass percent: 0.5 ~ 1% natrium citricum, 0.3 ~ 0.5% sodium iso-vc, 1 ~ 3% vitamin C, 1 ~ 3% antierythrite, 0.1 ~ 0.3% apple branch polyphenol, 0.1 ~ 0.3% glucolactone, 3 ~ 5%EDTA disodium, 0.2 ~ 0.3% chitosan, 1 ~ 5% pseudoacid slurry carbohydrate gum, surplus is water.In film-forming fresh-preserving agent in the present invention, natrium citricum can be lived by strong inhibition enzyme, and sodium iso-vc has the fresh-keeping effect helping look, and by the synergy of natrium citricum and sodium iso-vc, the brown stain that both can prevent rheum officinale from oppressing, can suppress again the generation of histamine in large yellow croaker, vitamin C has antioxidation, can the body surface color and luster of long sustaining large yellow croaker, prevent the oxidation decoloration of large yellow croaker body surface pigment and the oxidation of fat, but vitamin C is to thermally labile, be easy to degrade, add antierythrite and then can effectively slow down ascorbic degradation rate, can play ascorbic protective effect, apple branch polyphenol has antibacterial and antioxidation, harmful microorganism can be suppressed preferably, and can suppress to oppress fatty acid and slow down the oxidation of flesh of fish Middle nutrition material to a certain extent, relative to the bio-preservative such as Tea Polyphenols, ginger extract, the fresh-keeping effect of large yellow croaker can be significantly improved, apple branch polyphenol extracts from apple branch in addition, and the cost of raw material is low, can improve the utilization of agricultural product waste resource (apple branch), glucolactone can keep the elasticity of oppressing, after fish kills, endogenous enzymes in Fish tissue can also be had an effect, digest and decompose fish body voluntarily, going bad of further accelerating fish body, and the aqueous solution of EDETATE SODIUM is in alkalescence, the H+ of generation can be neutralized, stablize the environment pH of fish body, thus slow down the speed of large yellow croaker protein denaturation, extend the shelf-life of large yellow croaker, in addition, EDETATE SODIUM can also with iron, copper, calcium, the water soluble complex of the multivalent ion chela synthesizing stables such as magnesium, large yellow croaker generation brown stain or variable color can be prevented, greatly can also reduce the vigor of fish body endogenous enzymes, slow down the rate of deterioration of fish body further, chitosan has very strong bacteriostasis, and can promote that each component in antistaling agent is infiltrated in the structure of fish muscle of large yellow croaker, and in addition, chitosan can also stablize the natural colouring matter in fish body skin, plays the effect of fixation, makes fish physical efficiency keep its original color and luster for a long time, pseudoacid slurry carbohydrate gum is film forming matter, be a kind of extract from Nicandra Physaloides nontoxic, colourless, tasteless, edible polysaccharide colloid, security is high, extract and be also easier to, compared to shitosan, the conventional film forming matter such as sodium alginate, it has more excellent film forming and gelation, and there is certain fungistatic effect, and significantly can suppress the growth of microorganism, slow down the decomposition sex change of protein in the flesh of fish, the rising of the pH value of oppressing that slows down, good refreshing effect, in addition, pseudoacid slurry carbohydrate gum can also make vitamin C reach the effect of slowly-releasing, antioxidation can be kept for a long time.The biochemical characteristic that the present invention is directed to large yellow croaker develops a kind of composite film-forming preservative, its reasonable science of filling a prescription, the equal safety non-toxic of each component, edible safety is high, is promoted by mutually collaborative between each component, has good to protect look, fresh-keeping and antiseptic property, can under the prerequisite ensureing large yellow croaker edible quality and organoleptic quality, greatly extend the fresh keeping time of large yellow croaker, fresh-keeping effect is remarkable, has a extensive future; Be conducive to active principle under vacuum and infiltrate fish body.
(3) film forming: the large yellow croaker in step (2) is adopted cold wind is air-dry to drip to body surface dripless.Adopt cold wind air-dry to improve film forming efficiency, the diaphragm with macrura reevesii surface is formed more even.
(4) packaging refrigeration: by large yellow croaker in step (3) with after plastic film bag vacuum packaging, refrigerate under being placed in-5 ~ 0 DEG C of environment.
As preferably, in step (2), the mass ratio of large yellow croaker and film-forming fresh-preserving agent is 1:3 ~ 5.
As preferably, the temperature of film-forming fresh-preserving agent is 5 ~ 10 DEG C.The temperature of film-forming fresh-preserving agent is 5 ~ 10 DEG C, has both ensured the seepage velocity of film-forming fresh-preserving agent, causes the rotten of large yellow croaker when avoiding again soaking because temperature is too high.
As preferably, film-forming fresh-preserving agent obtains by the following method:
(1) apple branch polyphenol is prepared
Pulverize after apple branch after defoliation is dried to constant weight under 25 ± 2 DEG C of conditions, add the ethanolic solution that quality is dried apple branch quality 8 ~ 10 times, in ethanolic solution, the volumn concentration of ethanol is 70%, ultrasonic lixiviate 30 ~ 60min, suction filtration, by filtrate evaporated under reduced pressure to during without alcohol taste, with the centrifugal 20 ~ 30min of the speed of 3500 ~ 4000r/min, get supernatant, by supernatant vacuum freeze drying, obtain apple branch polyphenol.
(2) pseudoacid slurry carbohydrate gum is prepared
Dry false Calyx Physalis seed after removal of impurities being placed in quality is after the water immersion 1 ~ 2h of dry false Calyx Physalis seed quality 10 ~ 12 times, add thermal agitation in 50 ~ 60 DEG C and extract 1 ~ 2h, extract 3 layers of filtered through gauze, extruding 3 ~ 5min is repeatedly rubbed after filtrate gauze parcel, extract once by aforementioned condition again, merging filtrate, in 55 ~ 60 DEG C of Vacuum Concentrations to 1mL containing the concentrate of 1 ~ 1.5g solids, add ethanol after cooling and carry out alcohol precipitation, collecting precipitation in 55 ~ 60 DEG C of vacuum drying, pulverize, obtain pseudoacid slurry carbohydrate gum.
(3) composite
After taking each component by said ratio, first natrium citricum, sodium iso-vc, vitamin C, antierythrite, apple branch polyphenol, glucolactone, EDETATE SODIUM, chitosan are mixed with water, then add pseudoacid slurry carbohydrate gum carry out ultrasonic disperse.
As preferably, in step (), dried apple branch is crushed to the powder of diameter < 1mm.
As preferably, in step (), the temperature of ultrasonic lixiviate is 20 ~ 25 DEG C, supersonic frequency 100 ~ 120Hz.
As preferably, the cold wind temperature that in step (4), cold wind is air-dry is 5 ~ 10 DEG C, and cold wind wind speed is 1 ~ 3m/s.
Therefore, the present invention has following beneficial effect:
(1) adopt mass percentage concentration be 0.5 ~ 1% sodium bicarbonate solution large yellow croaker is cleaned, effectively to remove the mucus on large yellow croaker surface, being convenient to active principle in follow-up immersion process fully infiltrates in fish body, is conducive to fish surface film forming in follow-up film forming procedure simultaneously;
(2) biochemical characteristic for large yellow croaker develops a kind of composite film-forming preservative, its reasonable science of filling a prescription, the equal safety non-toxic of each component, edible safety is high, promoted to have and good protect look, fresh-keeping and antiseptic property by mutually collaborative between each component, can under the prerequisite ensureing large yellow croaker edible quality and organoleptic quality, greatly extend the fresh keeping time of large yellow croaker, fresh-keeping effect is remarkable;
(3) adopt the air-dry film forming of cold wind, film forming efficiency is high, and the diaphragm with macrura reevesii surface is formed more even;
(4) operating procedure is simple, and equipment investment is few, Environmental Safety, is applicable to suitability for industrialized production.
Detailed description of the invention
Below by detailed description of the invention, the present invention will be further described.
Embodiment 1
(1) pretreatment: by fresh and alive large yellow croaker with after death freezing, cleans with the sodium bicarbonate solution that mass percentage concentration is 1%, drains.
(2) soak: large yellow croaker is placed in after film-forming fresh-preserving agent soaks 30min under vacuum and takes out, the mass ratio of large yellow croaker and film-forming fresh-preserving agent is 1:5, the temperature of film-forming fresh-preserving agent is 10 DEG C, film-forming fresh-preserving agent is made up of the component of following mass percent: 1% natrium citricum, 0.5% sodium iso-vc, 3% vitamin C, 3% antierythrite, 0.3% apple branch polyphenol, 0.3% glucolactone, 5%EDTA disodium, 0.3% chitosan, 5% pseudoacid slurry carbohydrate gum, surplus is water, wherein, film-forming fresh-preserving agent obtains by the following method:
(1) apple branch polyphenol is prepared
The powder of diameter < 1mm is crushed to after apple branch after defoliation is dried to constant weight under 25 ± 2 DEG C of conditions, add the ethanolic solution that quality is dried apple branch quality 10 times, in ethanolic solution, the volumn concentration of ethanol is 70%, ultrasonic lixiviate 60min, the temperature of ultrasonic lixiviate is 25 DEG C, supersonic frequency 120Hz, suction filtration, by filtrate evaporated under reduced pressure to during without alcohol taste, with the centrifugal 30min of the speed of 4000r/min, get supernatant, by supernatant vacuum freeze drying, obtain apple branch polyphenol.
(2) pseudoacid slurry carbohydrate gum is prepared
Dry false Calyx Physalis seed after removal of impurities being placed in quality is after the water of dry false Calyx Physalis seed quality 12 times soaks 2h, add thermal agitation in 60 DEG C and extract 2h, extract 3 layers of filtered through gauze, repeatedly rub extruding 5min, then extract once by aforementioned condition after filtrate gauze parcel, merging filtrate, in 60 DEG C of Vacuum Concentrations to 1mL containing the concentrate of 1.5g solids, add ethanol after cooling and carry out alcohol precipitation, collecting precipitation in 60 DEG C of vacuum drying, pulverize, obtain pseudoacid slurry carbohydrate gum.
(3) composite
After taking each component by said ratio, first natrium citricum, sodium iso-vc, vitamin C, antierythrite, apple branch polyphenol, glucolactone, EDETATE SODIUM, chitosan are mixed with water, then add pseudoacid slurry carbohydrate gum carry out ultrasonic disperse.
(3) film forming: the large yellow croaker in step (2) is adopted cold wind is air-dry to drip to body surface dripless, the air-dry cold wind temperature of cold wind is 10 DEG C, and cold wind wind speed is 3m/s.
(4) packaging refrigeration: by large yellow croaker in step (3) with after plastic film bag vacuum packaging, refrigerate under being placed in 0 DEG C of environment.
Embodiment 2
(1) pretreatment: by fresh and alive large yellow croaker with after death freezing, cleans with the sodium bicarbonate solution that mass percentage concentration is 0.6%, drains.
(2) soak: large yellow croaker is placed in after film-forming fresh-preserving agent soaks 25min under vacuum and takes out, the mass ratio of large yellow croaker and film-forming fresh-preserving agent is 1:4, the temperature of film-forming fresh-preserving agent is 7 DEG C, film-forming fresh-preserving agent is made up of the component of following mass percent: 0.6% natrium citricum, 0.4% sodium iso-vc, 2% vitamin C, 2% antierythrite, 0.2% apple branch polyphenol, 0.2% glucolactone, 4%EDTA disodium, 0.25% chitosan, 2% pseudoacid slurry carbohydrate gum, surplus is water, wherein, film-forming fresh-preserving agent obtains by the following method:
(1) apple branch polyphenol is prepared
The powder of diameter < 1mm is crushed to after apple branch after defoliation is dried to constant weight under 25 ± 2 DEG C of conditions, add the ethanolic solution that quality is dried apple branch quality 9 times, in ethanolic solution, the volumn concentration of ethanol is 70%, ultrasonic lixiviate 35min, the temperature of ultrasonic lixiviate is 22 DEG C, supersonic frequency 110Hz, suction filtration, by filtrate evaporated under reduced pressure to during without alcohol taste, with the centrifugal 25min of the speed of 3600r/min, get supernatant, by supernatant vacuum freeze drying, obtain apple branch polyphenol.
(2) pseudoacid slurry carbohydrate gum is prepared
Dry false Calyx Physalis seed after removal of impurities being placed in quality is after the water of dry false Calyx Physalis seed quality 11 times soaks 1.5h, add thermal agitation in 55 DEG C and extract 1.5h, extract 3 layers of filtered through gauze, repeatedly rub extruding 4min, then extract once by aforementioned condition after filtrate gauze parcel, merging filtrate, in 56 DEG C of Vacuum Concentrations to 1mL containing the concentrate of 1.2g solids, add ethanol after cooling and carry out alcohol precipitation, collecting precipitation in 56 DEG C of vacuum drying, pulverize, obtain pseudoacid slurry carbohydrate gum.
(3) composite
After taking each component by said ratio, first natrium citricum, sodium iso-vc, vitamin C, antierythrite, apple branch polyphenol, glucolactone, EDETATE SODIUM, chitosan are mixed with water, then add pseudoacid slurry carbohydrate gum carry out ultrasonic disperse.
(3) film forming: the large yellow croaker in step (2) is adopted cold wind is air-dry to drip to body surface dripless, the air-dry cold wind temperature of cold wind is 8 DEG C, and cold wind wind speed is 2m/s.
(4) packaging refrigeration: by large yellow croaker in step (3) with after plastic film bag vacuum packaging, refrigerate under being placed in-4 DEG C of environment.
Embodiment 3
(1) pretreatment: by fresh and alive large yellow croaker with after death freezing, cleans with the sodium bicarbonate solution that mass percentage concentration is 0.5%, drains.
(2) soak: large yellow croaker is placed in after film-forming fresh-preserving agent soaks 20min under vacuum and takes out, the mass ratio of large yellow croaker and film-forming fresh-preserving agent is 1:3, the temperature of film-forming fresh-preserving agent is 5 DEG C, film-forming fresh-preserving agent is made up of the component of following mass percent: 0.5% natrium citricum, 0.3% sodium iso-vc, 1% vitamin C, 1% antierythrite, 0.1% apple branch polyphenol, 0.1% glucolactone, 3%EDTA disodium, 0.2% chitosan, 1% pseudoacid slurry carbohydrate gum, surplus is water, wherein, film-forming fresh-preserving agent obtains by the following method:
(1) apple branch polyphenol is prepared
The powder of diameter < 1mm is crushed to after apple branch after defoliation is dried to constant weight under 25 ± 2 DEG C of conditions, add the ethanolic solution that quality is dried apple branch quality 8 times, in ethanolic solution, the volumn concentration of ethanol is 70%, ultrasonic lixiviate 30min, the temperature of ultrasonic lixiviate is 20 ~ 25 DEG C, supersonic frequency 100Hz, suction filtration, by filtrate evaporated under reduced pressure to during without alcohol taste, with the centrifugal 20min of the speed of 3500r/min, get supernatant, by supernatant vacuum freeze drying, obtain apple branch polyphenol.
(2) pseudoacid slurry carbohydrate gum is prepared
Dry false Calyx Physalis seed after removal of impurities being placed in quality is after the water of dry false Calyx Physalis seed quality 10 times soaks 1h, add thermal agitation in 50 DEG C and extract 1h, extract 3 layers of filtered through gauze, repeatedly rub extruding 3min, then extract once by aforementioned condition after filtrate gauze parcel, merging filtrate, in 55 DEG C of Vacuum Concentrations to 1mL containing the concentrate of 1g solids, add ethanol after cooling and carry out alcohol precipitation, collecting precipitation in 55 DEG C of vacuum drying, pulverize, obtain pseudoacid slurry carbohydrate gum.
(3) composite
After taking each component by said ratio, first natrium citricum, sodium iso-vc, vitamin C, antierythrite, apple branch polyphenol, glucolactone, EDETATE SODIUM, chitosan are mixed with water, then add pseudoacid slurry carbohydrate gum carry out ultrasonic disperse.
(3) film forming: the large yellow croaker in step (2) is adopted cold wind is air-dry to drip to body surface dripless, the air-dry cold wind temperature of cold wind is 5 DEG C, and cold wind wind speed is 1m/s.
(4) packaging refrigeration: by large yellow croaker in step (3) with after plastic film bag vacuum packaging, refrigerate under being placed in-5 DEG C of environment.
Comparative example
By fresh and alive large yellow croaker with after death freezing, clean with clear water, drain, after plastic film bag vacuum packaging, refrigerate under being placed in-5 DEG C of environment.
Take out after large yellow croaker in the various embodiments described above and comparative example is refrigerated 20 days, carry out index of fish freshness mensuration to large yellow croaker, the assay method of index of fish freshness is as follows:
One. subjective appreciation
The eye of fish body, the gill, body surface, smell, the elasticity of muscle five are evaluated, be up to 9 points, according to the sensitivity of consumer to indices, determine that the weight of indices is 0.1,0.2,0.1,0.3,0.2, each item rating is multiplied by weight and is integrated sensory's scoring.One-level freshness is divided into 7 ~ 9; 5 ~ 7 are divided into secondary freshness.
Two. total number of bacteria measures
Adopt slat chain conveyor counting method, by SC/T3101-1984 standard, total number of bacteria (individual/g)≤10
4for one-level freshness; ≤ 10
5for secondary freshness.
Three .TVB-N (VBN)
Adopt semi-micro-sample distillation, by SC/T3101-1984 standard, TVB-N value (mg/100g)≤13 is one-level freshness; ≤ 30 is secondary freshness.
Four .pH pH-value determination pHs
Take mixing sample 10g, in beaker, add 90ml neutral water, stir, place 30min, period continuous jolting, then filter, filtrate measures with acidometer, directly reads pH value.
The result measured is as shown in the table:
As can be known from the above table, by its total plate count of large yellow croaker after preservation method process of the present invention, TVB-N all lower than comparative example, scoring and pH value higher than comparative example, and are secondary freshness, illustrate that preservation method of the present invention can significantly improve large yellow croaker freshness date, have broad application prospects.
Above-described embodiment is one of the present invention preferably scheme, not does any pro forma restriction to the present invention, also has other variant and remodeling under the prerequisite not exceeding the technical scheme described in claim.
Claims (7)
1. a large yellow croaker coating preservation method, is characterized in that, comprises the following steps:
(1) pretreatment: by fresh and alive large yellow croaker with after death freezing, cleans with the sodium bicarbonate solution that mass percentage concentration is 0.5 ~ 1%, drains;
(2) soak: large yellow croaker is placed in after film-forming fresh-preserving agent soaks 20 ~ 30min under vacuum and takes out, described film-forming fresh-preserving agent is made up of the component of following mass percent: 0.5 ~ 1% natrium citricum, 0.3 ~ 0.5% sodium iso-vc, 1 ~ 3% vitamin C, 1 ~ 3% antierythrite, 0.1 ~ 0.3% apple branch polyphenol, 0.1 ~ 0.3% glucolactone, 3 ~ 5%EDTA disodium, 0.2 ~ 0.3% chitosan, 1 ~ 5% pseudoacid slurry carbohydrate gum, surplus is water;
(3) film forming: the large yellow croaker in step (2) is adopted cold wind is air-dry to drip to body surface dripless;
(4) packaging refrigeration: by large yellow croaker in step (3) with after plastic film bag vacuum packaging, refrigerate under being placed in-5 ~ 0 DEG C of environment.
2. a kind of large yellow croaker coating preservation method according to claim 1, is characterized in that, in step (2), the mass ratio of large yellow croaker and film-forming fresh-preserving agent is 1:3 ~ 5.
3. a kind of large yellow croaker coating preservation method according to claim 1 and 2, is characterized in that, the temperature of film-forming fresh-preserving agent is 5 ~ 10 DEG C.
4. a kind of large yellow croaker coating preservation method according to claim 3, it is characterized in that, film-forming fresh-preserving agent obtains by the following method:
(1) apple branch polyphenol is prepared
Pulverize after apple branch after defoliation is dried to constant weight under 25 ± 2 DEG C of conditions, add the ethanolic solution that quality is dried apple branch quality 8 ~ 10 times, in ethanolic solution, the volumn concentration of ethanol is 70%, ultrasonic lixiviate 30 ~ 60min, suction filtration, by filtrate evaporated under reduced pressure to during without alcohol taste, with the centrifugal 20 ~ 30min of the speed of 3500 ~ 4000r/min, get supernatant, by supernatant vacuum freeze drying, obtain apple branch polyphenol;
(2) pseudoacid slurry carbohydrate gum is prepared
Dry false Calyx Physalis seed after removal of impurities being placed in quality is after the water immersion 1 ~ 2h of dry false Calyx Physalis seed quality 10 ~ 12 times, add thermal agitation in 50 ~ 60 DEG C and extract 1 ~ 2h, extract 3 layers of filtered through gauze, extruding 3 ~ 5min is repeatedly rubbed after filtrate gauze parcel, extract once by aforementioned condition again, merging filtrate, in 55 ~ 60 DEG C of Vacuum Concentrations to 1mL containing the concentrate of 1 ~ 1.5g solids, add ethanol after cooling and carry out alcohol precipitation, collecting precipitation in 55 ~ 60 DEG C of vacuum drying, pulverize, obtain pseudoacid slurry carbohydrate gum;
(3) composite
After taking each component by said ratio, first natrium citricum, sodium iso-vc, vitamin C, antierythrite, apple branch polyphenol, glucolactone, EDETATE SODIUM, chitosan are mixed with water, then add pseudoacid slurry carbohydrate gum carry out ultrasonic disperse.
5. a kind of large yellow croaker coating preservation method according to claim 4, is characterized in that, in step (), dried apple branch is crushed to the powder of diameter < 1mm.
6. a kind of large yellow croaker coating preservation method according to claim 1, is characterized in that, in step (), the temperature of ultrasonic lixiviate is 20 ~ 25 DEG C, supersonic frequency 100 ~ 120Hz.
7. a kind of large yellow croaker coating preservation method according to claim 1, is characterized in that, the cold wind temperature that in step (4), cold wind is air-dry is 5 ~ 10 DEG C, and cold wind wind speed is 1 ~ 3m/s.
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| CN105494600A (en) * | 2015-12-10 | 2016-04-20 | 浙江大学舟山海洋研究中心 | Method for preserving small yellow croaker by combining partial freezing and composite preservative |
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| CN109953106A (en) * | 2019-05-05 | 2019-07-02 | 宁德市海扬食品有限公司 | A kind of Larimichthys crocea low-temp antistaling method |
| CN109953105A (en) * | 2019-05-05 | 2019-07-02 | 宁德市海扬食品有限公司 | A kind of Larimichthys crocea quick-freezing fresh-keeping method |
| CN110720506A (en) * | 2019-09-27 | 2020-01-24 | 浙江海洋大学 | Frozen large yellow croaker quality guarantee method and application thereof |
| CN114557381A (en) * | 2022-03-11 | 2022-05-31 | 浙江工业大学 | Quick-freezing preservation method for large yellow croaker |
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| CN106336989A (en) * | 2016-08-18 | 2017-01-18 | 宁波阿拉酿酒有限公司 | Technology for brewing yellow rice wine by lactic acid bacteria direct vat set starter process |
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| CN109953106B (en) * | 2019-05-05 | 2022-03-15 | 宁德市海扬食品有限公司 | Low-temperature preservation method for large yellow croakers |
| CN109953105B (en) * | 2019-05-05 | 2022-03-15 | 宁德市海扬食品有限公司 | Large yellow croaker quick-freezing preservation method |
| CN110720506A (en) * | 2019-09-27 | 2020-01-24 | 浙江海洋大学 | Frozen large yellow croaker quality guarantee method and application thereof |
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| CN114557381B (en) * | 2022-03-11 | 2024-03-15 | 浙江工业大学 | Quick-freezing fresh-keeping method for large yellow croaker |
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