CN108935631B - Arsenic removal and fresh-keeping treatment method for euphausia superba - Google Patents
Arsenic removal and fresh-keeping treatment method for euphausia superba Download PDFInfo
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
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Abstract
The invention relates to the technical field of antarctic krill preservation, in particular to a dearsenization and preservation treatment method for antarctic krill, which comprises the steps of placing the antarctic krill in a water suspension system for calcining shell powder, applying a high-voltage pulse electric field for soaking, calcining the calcined shell powder at 1100-1300 ℃ by blending the shell powder and sodium carbonate powder, further modifying the calcined shell powder by fucosan sulfate, then placing the antarctic krill in a preservation solvent for soaking, wherein the preservation solvent consists of a first solvent, a second solvent and a third solvent which are sequentially used, the first solvent forms a hydrophilic preservation film, the third solvent forms a preservation hydrophobic oil film, and the second solvent forms an amphoteric water-retaining film for connecting the two solvents. The arsenic removal and the fresh keeping of the antarctic krill are simultaneously carried out, and the arsenic removal rate can reach 40-50%; the antarctic krill still keeps better quality after being refrigerated for 2 weeks at low temperature, the conditions of dearsenization and fresh keeping are mild, the process is simple, most of the used reagents are natural or natural modified substances, and the method is safe and harmless.
Description
Technical Field
The invention relates to the technical field of processing and preservation of antarctic krill, in particular to a method for dearsenifying and fresh-keeping treatment of antarctic krill.
Background
Antarctic krill is a crustacean zooplankton living in the south oceanic, is abundant in resources, plays an important role in the south oceanic food chain, is food for seals, whales and penguins, and is also an important marine organism resource. Antarctic krill is the highest protein-containing organism found today, has a protein content of more than fifty percent, is rich in amino acids and vitamin A which are necessary for human tissues, contains protein equivalent to the nutritive value of two hundred grams of roasted meat every ten krill, and is the largest animal protein bank on the earth. However, the euphausia superba is easy to denature and deteriorate due to high protease activity of the euphausia superba, wherein tyrosinase is easy to oxidize into melanin, which affects the color and quality of the euphausia superba, and the euphausia superba is easy to oxidize due to high content of unsaturated fatty acid in the euphausia superba, so that the euphausia superba is easy to deteriorate. Meanwhile, the antarctic krill is easy to enrich heavy metals in the growth process, particularly high-content arsenic, including trimethyl arsonate, methyl arsonate and trivalent and pentavalent electrodeless arsenic, wherein the inorganic arsenic has strong toxicity and causes harm to human bodies after being eaten; therefore, in order to develop the application of the antarctic krill, the antarctic krill needs to be subjected to dearsenization treatment and effectively preserved, and the preservation time is prolonged.
At present, methods for dearsenifying treatment of aquatic products mainly comprise resin adsorption, hydrogen peroxide removal and the like. The resin adsorption effect is general, and the regeneration of the resin is involved, so that the process is complex; the conditions for removing the hydrogen peroxide are harsh, so that the quality of the aquatic products is easy to change; the preservation of aquatic products, especially shrimps, mainly adopts sulfite as an inhibitor or an additive for delaying the blackening of the shrimps, but the method has potential safety hazard.
Disclosure of Invention
Aiming at the defects of the existing dearsenification and fresh-keeping aquatic product method, the application aims to provide the dearsenification and fresh-keeping treatment method for the antarctic krill, which can effectively remove the arsenic content in the antarctic krill, and has good fresh-keeping effect and safe eating.
The invention provides the following technical scheme:
a dearsenification and fresh-keeping treatment method for antarctic krill comprises the following steps:
(1) cleaning the captured euphausia superba, then soaking the euphausia superba in low-concentration salt solution, and cleaning the euphausia superba after fishing out;
(2) adding calcined shell powder into water, stirring and dispersing uniformly to obtain a suspension system, placing cleaned antarctic krill into the suspension system, oscillating and soaking for 120-240 min, and applying a high-voltage pulse electric field;
(3) filtering to remove calcined shell powder after soaking, cleaning the antarctic krill, and soaking the antarctic krill in a fresh-keeping solvent;
(4) draining the soaked antarctic krill, and preserving at low temperature.
Preferably, in the suspension system in the step (2), the dispersion concentration of the calcined shell powder is 10-20 g/L, the mass ratio of the antarctic krill to the calcined shell powder is 1-5: 1, and the temperature is 2-5 ℃.
Preferably, the calcined shell powder is prepared by crushing the shell powder to 60-100 meshes, uniformly mixing the crushed shell powder with sodium carbonate powder according to the mass ratio of 1: 0.1-0.4, and calcining at 1100-1300 ℃ for 2-5 hours.
As a preference of the process according to the invention, the calcined shell powder is modified using: placing 10-50 g of calcined shell powder into 1L of fucosan sulfate aqueous solution with the concentration of 1-5 wt%, adding 0.2-0.5 g of silane coupling agent, adjusting the pH value to be neutral, stirring and keeping for 4-6 h, then filtering, and drying at normal temperature to obtain the modified calcined shell powder.
Preferably, the voltage of the applied high-voltage pulse electric field is 2-5 KV, the current is 3-5 mA, and the high-voltage pulse electric field is applied for 5min every 30 min.
As a preferable mode of the method of the present invention, the fresh-keeping solvent in the step (3) is composed of a first solvent, a second solvent and a third solvent which are sequentially used for soaking the antarctic krill, wherein:
the first solvent consists of 10-20 parts by weight of N, O-carboxymethyl chitosan or chitosan oligosaccharide, 4-9 parts by weight of fucosan sulfate, 5-8 parts by weight of sodium lactate, 1-3 parts by weight of D-sodium isoascorbate, 1-3 parts by weight of tea polyphenol and 150-200 parts by weight of deionized water;
the second solvent consists of 3-10 parts by weight of nonionic surfactant and 80-100 parts by weight of deionized water;
the third solvent consists of 10-30 parts by weight of camellia oil, 10-30 parts by weight of olive oil or linseed oil, 5-8 parts by weight of vitamin E and 80-100 parts by weight of deionized water;
the solid-liquid mass ratio of the Antarctic krill to the first solvent, the second solvent and the third solvent is 1: 8-12: 1-2: 3-6, the Antarctic krill is sequentially soaked in the first solvent, the second solvent and the third solvent for 2-5 hours, and water is drained for 5-10 min, wherein the soaking temperature is 1-5 ℃.
Preferably, the nonionic surfactant is one or more of starch grafted sodium acrylate, hydroxylated soybean phospholipid, sucrose fatty acid ester or sodium polyacrylate.
Preferably, in the step (1), the concentration of the salt solution is 0.5-1 wt%, the soaking temperature is 0-5 ℃, and the soaking time is 60-90 min.
The preferable selection of the method is that the low-temperature fresh-keeping storage temperature is 1-5 ℃.
According to the method for arsenic removal and fresh keeping of the antarctic krill, arsenic removal and fresh keeping are carried out simultaneously. Firstly, the captured antarctic krill is soaked in low-concentration saline water, impurities on the surface of the dried small shrimps are removed, sterilization and disinfection are carried out, and meanwhile, the metabolic activity of the antarctic krill is reduced. The concentration of the brine is not easy to be too high or too low, otherwise the deterioration of proteins in the shrimps and the like is easy to cause or the good impurity removal and sterilization effects are not achieved. And then placing the euphausia superba after being drained into a water dispersion system of calcined shell powder. The shell mainly comprises calcium carbonate, calcium oxide is formed after calcination at 1100-1300 ℃, and meanwhile, the shell also contains a certain amount of alkali metal and alkaline earth metal compounds, such as sodium chloride, magnesium sulfate and the like, most of the alkali metal and alkaline earth metal compounds are molten during calcination at 1100-1300 ℃, and the alkali metal and alkaline earth metal compounds and sufficient sodium carbonate (melting point 851 ℃) are added to form a low-melting-point cosolvent, so that more pores are generated in calcined shell powder, the pore size is larger, the shell powder has stronger adsorption performance on metal ions, and the removal of metal ions such as arsenic is realized. Meanwhile, the pH environment of the water dispersion liquid shows alkalinity due to the existence of calcium oxide, sodium carbonate and other alkali metal and alkaline earth metal compounds, and can play a role in bacteriostasis and sterilization. The pulse electric field is applied in the process of calcining the shell powder to remove arsenic, so that the permeability of cell walls and cell membranes of antarctic krill can be increased, heavy metal ions such as trivalent arsenic and pentavalent arsenic flow out, and the adsorption and removal of inorganic arsenic by the calcined shell powder are facilitated. Experiments show that the removal rates of arsenic, lead and copper of the euphausia superba processed by the process can respectively reach 40-50%, 22-30% and 34-38%. Meanwhile, the pulse electric field can reduce the enzyme activity of the antarctic krill in a very short time, and the instantly generated ozone has a sterilization effect, so that the fresh-keeping of the antarctic krill is enhanced. However, the inventor finds that the intensity of the pulse electric field is not suitable for being too high, otherwise, the denaturation of organic matters such as more proteins in the antarctic krill is not beneficial to preservation. The fucosan sulfate has good solubility, is connected to the calcined shell powder through a silane coupling agent, and can form a complex with arsenic, copper and lead ions in the calcined shell powder adsorption or water dispersion system due to abundant hydroxyl, sulfate and other groups in the fucosan sulfate, so that the dearsenification effect is enhanced.
Soaking the dearsenized antarctic krill in a fresh-keeping solvent, wherein the fresh-keeping solvent consists of a first solvent, a second solvent and a third solvent which are sequentially soaked for use, the water solubility of N, O-carboxymethyl chitosan and chitosan oligosaccharide in the first solvent is high, a hydrophilic film can be formed on the surface of the antarctic krill, and rich hydroxyl groups can form hydrogen bonds with protein, water and the like in the antarctic krill, so that the effects of fixing water and keeping water are achieved, and the effects of bacteriostasis and antioxidation are achieved. Alkalescence formed by dissolving sodium lactate in a hydrophilic film can help the pH value of antarctic krill cells to balance and prevent water loss; fucosan sulfate, D-sodium isoascorbate and tea polyphenol are dissolved in the hydrophilic film to play a role in synergistically strengthening the antioxidation and the preservation, so that a first layer of water-retaining preservation film is formed on the antarctic krill; the starch grafted sodium polyacrylate, the hydroxylated soybean phospholipid, the sucrose fatty acid ester and the sodium polyacrylate which are preferred as the nonionic surfactant in the second solvent have hydrophilic/lipophilic amphiphilicity, a thin-layer network structure (which can be understood as a film) is formed in a low-concentration aqueous solution, and the hydrophilic group of the water-retaining preservative film formed by the hydrophilic and the first solvent is connected to play a role in enhancing water retention and preservation. The vegetable oil in the third solvent is dissolved with the oil-soluble vitamin E to form an oil film on the surface of the antarctic krill to play a role in water retention, and the camellia oil, the olive oil and the linseed oil which are selected from the vegetable oil have good oxidation resistance and rancidity resistance, so that the vitamin E is synergistically enhanced, and the water retention and the enhanced preservation are realized. And the oil film is connected with the lipophilic oil base in the second solvent through lipophilicity, and a hydrophilic preservative film, a water-retention-enhanced net structure and a water-retention and preservative oil film are sequentially formed on the antarctic krill from inside to outside, so that good water retention and preservative effects are achieved, and the water retention and preservative enhancement is realized. Therefore, the euphausia superba is sequentially soaked in the fresh-keeping solvent for draining to form a three-layer water-retaining fresh-keeping structure, and the effects of water retention, fresh keeping and rancidity resistance are achieved.
The invention has the following beneficial effects:
according to the method, the arsenic removal and the fresh keeping of the antarctic krill are carried out simultaneously, the antarctic krill is placed in the water dispersion system of the modified calcined shell powder and a pulse electric field is applied, the arsenic removal and the fresh keeping are achieved, and the arsenic removal rate can reach 40% -50%; then, the three solvents in the fresh-keeping solvent are sequentially soaked to form a three-layer water-retaining fresh-keeping film structure, so that the effects of water retention, fresh keeping and rancidity resistance are achieved, the arsenic removal and fresh keeping conditions are mild, the process is simple, most of the used reagents are natural or natural modified substances, and the fresh-keeping film structure is safe and harmless.
Detailed Description
The following further describes the embodiments of the present invention.
The starting materials used in the present invention are commercially available or commonly used in the art, unless otherwise specified, and the methods in the following examples are conventional in the art, unless otherwise specified.
Example 1
A dearsenification and fresh-keeping treatment method for antarctic krill comprises the following steps:
(1) cleaning the captured antarctic krill, then soaking in 0.5 wt% of low-concentration salt solution for 90min at the soaking temperature of 0 ℃, taking out and cleaning;
(2) adding calcined shell powder into water, stirring and dispersing uniformly to obtain a suspension system with the dispersion concentration of 10g/L, wherein the calcined shell powder is prepared by crushing the shell powder to 60 meshes, uniformly mixing the crushed shell powder with sodium carbonate powder according to the mass ratio of 1:0.1, and calcining the mixture at 1100 ℃ for 5 hours; placing the cleaned antarctic krill in a suspension system according to the mass ratio of 1:1 to the calcined shell powder, oscillating and soaking for 120min at the soaking temperature of 2 ℃, applying a high-voltage pulse electric field while soaking, wherein the voltage of the high-voltage pulse electric field is 3KV, the current is 4mA, and applying for 5min at intervals of 30 min;
(3) filtering to remove calcined shell powder after soaking, cleaning the antarctic krill, soaking the antarctic krill in a fresh-keeping solvent, wherein the fresh-keeping solvent consists of a first solvent, a second solvent and a third solvent which are sequentially soaked in the antarctic krill,
the first solvent consists of 10g of N, O-carboxymethyl chitosan, 4g of fucosan sulfate, 5g of sodium lactate, 1g of D-sodium isoascorbate, 1g of tea polyphenol and 150g of deionized water;
the second solvent consists of 3g of non-ionic surfactant starch grafted sodium acrylate and 80g of deionized water;
the third solvent consists of 10g of camellia oil, 5g of vitamin E and 80g of deionized water;
the solid-liquid mass ratio of the Antarctic krill to the first solvent, the second solvent and the third solvent is 1:8:1:3, and the Antarctic krill is sequentially soaked in the first solvent, the second solvent and the third solvent for 2 hours and drained for 5min at the soaking temperature of 1 ℃;
(4) draining the soaked antarctic krill, and preserving at low temperature of 1 deg.C.
Example 2
The difference between the arsenic removal and fresh-keeping treatment method of the antarctic krill and the example 1 is that:
the second solvent consisted of 3g of hydroxylated soy phospholipid and 80g of deionized water.
Example 3
The difference between the arsenic removal and fresh-keeping treatment method of the antarctic krill and the example 1 is that:
the calcined shell powder is modified by the following steps: and (2) putting 10g of calcined shell powder into 1L of fucosan sulfate aqueous solution with the concentration of 1 wt%, adding 0.2g of silane coupling agent, adjusting the pH value to be neutral, stirring and keeping for 4 hours, and then filtering and drying at normal temperature to obtain the modified calcined shell powder.
Example 4
The difference between the arsenic removal and fresh-keeping treatment method of the antarctic krill and the example 1 is that:
the calcined shell powder is modified by the following steps: and (2) placing 30g of calcined shell powder into 1L of fucosan sulfate aqueous solution with the concentration of 2 wt%, adding 0.4g of silane coupling agent, adjusting the pH value to be neutral, stirring and keeping for 5 hours, and then filtering and drying at normal temperature to obtain the modified calcined shell powder.
Example 5
The difference between the arsenic removal and fresh-keeping treatment method of the antarctic krill and the example 1 is that:
the calcined shell powder is modified by the following steps: 50g of calcined shell powder is placed in 1L of fucosan sulfate aqueous solution with the concentration of 5 wt%, 0.5g of silane coupling agent is added, the pH value is adjusted to be neutral, stirring is carried out for 6 hours, and then filtering and drying at normal temperature are carried out to obtain the modified calcined shell powder.
Example 6
A dearsenification and fresh-keeping treatment method for antarctic krill comprises the following steps:
(1) cleaning the captured antarctic krill, then soaking in 0.7 wt% of low-concentration salt solution for 80min at 3 ℃, taking out, and cleaning;
(2) adding calcined shell powder into water, stirring and dispersing uniformly to obtain a suspension system with the dispersion concentration of 15g/L, wherein the calcined shell powder is prepared by crushing shells into 80 meshes, uniformly mixing with sodium carbonate powder according to the mass ratio of 1:0.3, and calcining at 1200 ℃ for 3 hours; placing the cleaned antarctic krill in a suspension system according to the mass ratio of 3:1 to calcined shell powder, oscillating and soaking for 180min, wherein the soaking temperature is 3 ℃, a high-voltage pulse electric field is applied while soaking, the voltage of the high-voltage pulse electric field is 5KV, the current is 8mA, and the high-voltage pulse electric field is applied for 5min every 30 min;
(3) filtering to remove calcined shell powder after soaking, cleaning the antarctic krill, soaking the antarctic krill in a fresh-keeping solvent, wherein the fresh-keeping solvent consists of a first solvent, a second solvent and a third solvent which are sequentially soaked in the antarctic krill,
the first solvent consists of 15g of N, O-carboxymethyl chitosan, 6g of fucosan sulfate, 7g of sodium lactate, 2g of D-sodium isoascorbate, 2g of tea polyphenol and 180g of deionized water;
the second solvent consists of 7g of sucrose fatty acid ester and 90g of deionized water;
the third solvent consists of 20g of olive oil, 7g of vitamin E and 90g of deionized water;
the solid-liquid mass ratio of the Antarctic krill to the first solvent, the second solvent and the third solvent is 1:9:1.5:4, and the Antarctic krill is sequentially soaked in the first solvent, the second solvent and the third solvent for 4 hours and drained for 8 minutes at the soaking temperature of 3 ℃;
(4) draining the soaked antarctic krill, and preserving at low temperature of 3 ℃.
Example 7
A dearsenification and fresh-keeping treatment method for antarctic krill comprises the following steps:
(1) cleaning the captured antarctic krill, then soaking in 1 wt% of low-concentration salt solution for 60min at 5 ℃, taking out and cleaning;
(2) adding calcined shell powder into water, stirring and dispersing uniformly to obtain a suspension system with the dispersion concentration of 20g/L, wherein the calcined shell powder is prepared by crushing the shell powder to 100 meshes, uniformly mixing the crushed shell powder with sodium carbonate powder according to the mass ratio of 1:0.4, and calcining the mixture at 1300 ℃ for 2 hours; placing the cleaned antarctic krill in a suspension system according to the mass ratio of 5:1 to the calcined shell powder, oscillating and soaking for 240min, wherein the soaking temperature is 5 ℃, a high-voltage pulse electric field is applied while soaking, the voltage of the high-voltage pulse electric field is 7KV, the current is 10mA, and the high-voltage pulse electric field is applied for 5min every 30 min;
(3) filtering to remove calcined shell powder after soaking, cleaning the antarctic krill, soaking the antarctic krill in a fresh-keeping solvent, wherein the fresh-keeping solvent consists of a first solvent, a second solvent and a third solvent which are sequentially soaked in the antarctic krill,
the first solvent consists of 20g of chitosan oligosaccharide, 9g of fucosan sulfate, 8g of sodium lactate, 3g of D-sodium isoascorbate, 3g of tea polyphenol and 200g of deionized water;
the second solvent consists of 10g of sodium polyacrylate and 100g of deionized water;
the third solvent consists of 30g of linseed oil, 8g of vitamin E and 100g of deionized water;
the solid-liquid mass ratio of the Antarctic krill to the first solvent, the second solvent and the third solvent is 1:12:2:6, and the Antarctic krill is sequentially soaked in the first solvent, the second solvent and the third solvent for 5 hours and drained for 10min at the soaking temperature of 5 ℃;
(4) draining the soaked antarctic krill, and preserving at the low temperature of 5 ℃.
Example 8
The difference between the arsenic removal and preservation treatment method of the antarctic krill and the example 7 is that:
the nonionic surfactant used in the second solvent consists of hydroxylated soybean phospholipid, sucrose fatty acid ester and sodium polyacrylate according to the mass ratio of 1:0.8: 0.3.
Results of the experiment
8 groups of the same batch of antarctic krill (10 antarctic krill in each group, total weight about 20g) were treated according to the methods of examples 1-8 above, and:
(1) calculating the average weight gain rate before and after soaking in the fresh-keeping solvent;
(2) taking out 5 of the euphausia superba products after being stored for 2 weeks at low temperature, calculating the water loss rate, evaluating the appearance and the edible mouthfeel, measuring the content of volatile basic nitrogen by using semi-micro fixed nitrogen, measuring the content of the volatile basic nitrogen of the processed lead by using 5 euphausia superba products in the same batch, and calculating the growth percentage of the volatile basic nitrogen;
(3) and (3) detecting the heavy metal removal rate: respectively heating and digesting the remaining 5 of the arsenic-containing compounds by nitric acid and perchloric acid, extracting by hydrochloric acid to a constant volume, and measuring the contents of the arsenic, the lead and the copper after treatment by an inductively coupled plasma atomic emission spectrometry; and (3) taking untreated antarctic krill 5 of the same batch, measuring the content of arsenic, lead and copper before treatment according to the same method, and then calculating the removal rate of each group of arsenic, lead and copper. The results are shown in table 1 below.
TABLE 1 test results
Claims (8)
1. A dearsenification and fresh-keeping treatment method for antarctic krill is characterized by comprising the following steps:
(1) cleaning the captured euphausia superba, then soaking the euphausia superba in low-concentration salt solution, and cleaning the euphausia superba after fishing out;
(2) adding calcined shell powder into water, stirring and dispersing uniformly to obtain a suspension system, placing cleaned antarctic krill into the suspension system, oscillating and soaking for 120-240 min, and applying a high-voltage pulse electric field;
(3) filtering to remove calcined shell powder after soaking, cleaning the antarctic krill, and soaking the antarctic krill in a fresh-keeping solvent;
(4) draining the soaked antarctic krill, and then placing the euphausia superba in a low-temperature fresh-keeping storage mode;
the fresh-keeping solvent in the step (3) is composed of a first solvent, a second solvent and a third solvent which are used for sequentially soaking the antarctic krill, wherein:
the first solvent consists of 10-20 parts by weight of N, O-carboxymethyl chitosan or chitosan oligosaccharide, 4-9 parts by weight of fucosan sulfate, 5-8 parts by weight of sodium lactate, 1-3 parts by weight of D-sodium isoascorbate, 1-3 parts by weight of tea polyphenol and 150-200 parts by weight of deionized water;
the second solvent consists of 3-10 parts by weight of nonionic surfactant and 80-100 parts by weight of deionized water;
the third solvent consists of 10-30 parts by weight of camellia oil, 10-30 parts by weight of olive oil or linseed oil, 5-8 parts by weight of vitamin E and 80-100 parts by weight of deionized water;
the solid-liquid mass ratio of the Antarctic krill to the first solvent, the second solvent and the third solvent is 1: 8-12: 1-2: 3-6, the Antarctic krill is sequentially soaked in the first solvent, the second solvent and the third solvent for 2-5 hours, and water is drained for 5-10 min, wherein the soaking temperature is 1-5 ℃.
2. The dearsenification and fresh-keeping treatment method according to claim 1, wherein in the suspension system in the step (2), the dispersion concentration of the calcined shell powder is 10-20 g/L, the mass ratio of the antarctic krill to the calcined shell powder is 1-5: 1, and the temperature is 2-5 ℃.
3. The dearsenification and fresh-keeping treatment method according to claim 1 or 2, characterized in that the calcined shell powder is prepared by crushing the shell powder to 60-100 meshes, uniformly mixing the crushed shell powder with sodium carbonate powder according to a mass ratio of 1: 0.1-0.4, and calcining the mixture at 1100-1300 ℃ for 2-5 hours.
4. The dearsenification and fresh-keeping treatment method according to claim 3, wherein the calcined shell powder is modified to use: placing 10-50 g of calcined shell powder into 1L of fucosan sulfate aqueous solution with the concentration of 1-5 wt%, adding 0.2-0.5 g of silane coupling agent, adjusting the pH value to be neutral, stirring and keeping for 4-6 h, then filtering, and drying at normal temperature to obtain the modified calcined shell powder.
5. The dearsenification and fresh-keeping treatment method according to claim 1 or 2, wherein the voltage of the applied high-voltage pulse electric field is 3-7 KV, the current is 4-10 mA, and the high-voltage pulse electric field is applied for 5min every 30 min.
6. The dearsenification and fresh-keeping treatment method according to claim 1, wherein the non-ionic surfactant is one or more of starch grafted sodium acrylate, hydroxylated soybean lecithin, sucrose fatty acid ester or sodium polyacrylate.
7. The dearsenification and fresh-keeping treatment method according to claim 1 or 2, wherein the concentration of the salt solution in the step (1) is 0.5-1 wt%, the soaking temperature is 0-5 ℃, and the soaking time is 60-90 min.
8. The dearsenification and fresh-keeping treatment method according to claim 1 or 2, wherein the low-temperature fresh-keeping storage temperature is 1-5 ℃.
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| CN115868611A (en) * | 2022-12-30 | 2023-03-31 | 青岛海洋食品营养与健康创新研究院 | Euphausia superba micro-capsule powder with low fluorine content and high amino nitrogen content and preparation method thereof |
| CN115944066A (en) * | 2022-12-30 | 2023-04-11 | 中国水产有限公司 | Euphausia superba hydrolysate with low fluorine content and high amino nitrogen content and preparation method thereof |
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