CN107361129A - A kind of rape controlled atmospheric packing preservation method - Google Patents
A kind of rape controlled atmospheric packing preservation method Download PDFInfo
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- CN107361129A CN107361129A CN201710755044.9A CN201710755044A CN107361129A CN 107361129 A CN107361129 A CN 107361129A CN 201710755044 A CN201710755044 A CN 201710755044A CN 107361129 A CN107361129 A CN 107361129A
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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
- A23B7/00—Preservation or chemical ripening of fruit or vegetables
- A23B7/14—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10
- A23B7/144—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of gases, e.g. fumigation; Compositions or apparatus therefor
- A23B7/148—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of gases, e.g. fumigation; Compositions or apparatus therefor in a controlled atmosphere, e.g. partial vacuum, comprising only CO2, N2, O2 or H2O
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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
- A23B7/00—Preservation or chemical ripening of fruit or vegetables
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
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Abstract
The present invention provides a kind of rape controlled atmospheric packing preservation method, comprises the following steps：Select, clean, drain, sterilize, pack, vacuumize, inflate, seal, storage, wherein the step of inflation is inputs O using high-accuracy gas mixing device into the bag equipped with rape2、CO2、N2Gas, its parameter value are respectively：O2Concentration is less than 2%, CO2Concentration is more than 20%, remaining gas N2.The modern design of the present invention, method is unique, widely used, solves the key technology of short, the perishable flavescence of rape shelf life.This rape controlled atmospheric packing preservation method production cost is low, by the original normal temperature shelf life extension of 3 days by more than 25 days, high practicability, generalization.
Description
Technical field
The invention belongs to food processing field, and in particular to a kind of rape controlled atmospheric packing preservation method.
Background technology
Rape is a kind of blackish green leaf vegetables of with high nutritive value, per the kilocalorie of 100g rapes heat content 23, carrotene 623
Microgram, 210 milligrams of potassium, 108 milligrams of calcium, the microgram of vitamin A 103,55.9 milligrams of sodium, 39 milligrams of phosphorus, 36 milligrams of vitamin C,
22 milligrams of magnesium, 3.78 grams of carbohydrate, 1.8 grams of protein, 1.2 milligrams of iron, 1.1 grams of cellulose, 0.89 milligram of vitamin E,
The microgram of selenium 0.79,0.72 milligram of nicotinic acid, 0.5 gram of fat, 0.35 milligram of zinc, 0.23 milligram of manganese, 0.15 milligram of riboflavin.Rape
Contained vitamin C is higher than Chinese cabbage more than 1 times.Promoting blood circulation and removing blood stasis, the removing toxicity for detumescence of energy, wide intestines defaecation effect, physical fitness.Cure mainly
The illnesss such as urticaria erysipelas, brothers' furuncle, acute mastitis, habitual constipation, the elderly's calcium deficiency.
But rape is during post-harvest fresh-keeping, easily produces mechanical damage, phenomena such as aging, nutritional ingredient are lost, use
The freshness date of the processing methods such as spontaneous controlled-atmosphere only has 7-10 days, it is difficult to meets the requirement stored and transported for a long time.Add antistaling agent, anti-corrosion
Agent, deepfreeze etc. can prolong storage period, but consider food-safety problem, it is difficult to meet the requirement of consumer.The opposing party
Face, deepfreeze need to increase extra cost of transportation and shelf cost, especially greatly affected in the season of heat
Rape post-harvest fresh-keeping problem.
The content of the invention
In view of this, the present invention provides a kind of rape controlled atmospheric packing preservation method, comprises the following steps：Select, clean,
Drain, sterilize, pack, vacuumize, inflate, seal, storage.
Preferably, in rape controlled atmospheric packing preservation method of the invention, the selecting step be select it is old tender moderate new
Fresh rape, remove old leaf and rotten leaf.
Preferably, in rape controlled atmospheric packing preservation method of the invention, the cleaning step is by rape root with running water
The soil in portion is rinsed well.
Preferably, in rape controlled atmospheric packing preservation method of the invention, the draining step is to drag for the rape after cleaning
Go out to be put into draining 10-20min in Lou basin.
Preferably, in rape controlled atmospheric packing preservation method of the invention, the sterilisation step is to be put into clean rape
Carry out disinfection 5-10min in ready liquor natrii hypochloritis in advance.
Preferably, in rape controlled atmospheric packing preservation method of the invention, the concentration of the liquor natrii hypochloritis is 50-
70ppm。
Preferably, in rape controlled atmospheric packing preservation method of the invention, the pouch step is to weigh the rape drained
500g, it is put into 500mm × 300mm high-barrier PE bags, and rape is in loose condition (of surface).
Preferably, in rape controlled atmospheric packing preservation method of the invention, the vacuum step is by the rape after pack
Gas-control packing device is put into, is vacuumized.
Preferably, it is to utilize high-precision distribution in rape controlled atmospheric packing preservation method of the invention, the step of the inflation
Instrument inputs O into the bag equipped with rape2、CO2、N2Gas, its parameter value are respectively：O2Concentration is less than 2%, CO2Concentration is big
In 20%, remaining gas N2。
Preferably, in rape controlled atmospheric packing preservation method of the invention, to make sack be in complete the step of the sealing
State is heaved, away from being sealed at sack 2-3cm；The condition of the storage preservation is that the sack of sealing is put into 20 ± 5 DEG C
Preservation in environment.
The present invention at least has the advantage that：
1) present invention changes tradition and first sterilizes the technique cleaned afterwards, on the one hand selects at the disinfectant that has no toxic side effect
Manage rape, it can be ensured that sterilization does not cause secondary pollution simultaneously；On the other hand can retain after sterilization on blade face containing sterilization
The moisture of agent, certain vapour pressure is formed in PE films, suppress rape transpiration and also reduce corruption caused by microorganism simultaneously
Phenomenon；
2) by the way that in specific aqueous environment, low oxygen, high CO2 environment, which can reduce rape metabolism, reduces solid content
The reduction of composition, while have been surprisingly found that High water cut environment can greatly suppress yellow injuries of the CO2 to rape；
3) the inventive method can extend the shelf time to 10 days in the environment of 20 ± 5 DEG C of room temperature, substantially prolongs
Rape storage time during high temperature season, solve the transport of rape normal temperature, storage problem.
The modern design of the present invention, method is unique, widely used.It is short, easy that the method for the present invention solves rape shelf life
The rotten key technology to turn yellow.This rape controlled atmospheric packing preservation method production cost is low, and the original normal temperature shelf life of 3 days is prolonged
Grow to more than 25 days, high practicability, generalization.
Brief description of the drawings
Fig. 1 is the process chart of fresh-cut oil generation dish controlled atmospheric packing preservation method in one embodiment of the present of invention；
Influence schematic diagrames of the Fig. 2 for normal temperature controlled atmosphere method in one embodiment of the present of invention to rape biochemistry physical signs；
Fig. 3 is influence schematic diagram of the controlled atmosphere to rape organoleptic quality in one embodiment of the present of invention；
Fig. 4 is influence schematic diagram of the controlled atmosphere to rape weight-loss ratio in one embodiment of the present of invention；
Fig. 5 is influence schematic diagram of the controlled atmosphere to Chlorophyll in Rape content in one embodiment of the present of invention；
Fig. 6 is influence schematic diagram of the controlled atmosphere to Vitamin C content in one embodiment of the present of invention；
Fig. 7 is the influence schematic diagram that controlled atmosphere changes to rape soluble solid in one embodiment of the present of invention.
Embodiment
As shown in figure 1, in one embodiment of the invention, there is provided a kind of rape controlled atmospheric packing preservation method, including
Following steps：Select, cleaning, drain, sterilize, pack, vacuumize, inflate, seal, be put in storage, each label point in wherein Fig. 1
It is not：1 is selected, cleaning 2,3 is drained, sterilization 4, pack 5, vacuumizes 6, inflation 7, seal 8, storage 9.
Preferably, in one embodiment of the invention, the selecting step is to select old tender moderate fresh rape,
Remove old leaf and rotten leaf.
Preferably, in one embodiment of the invention, the cleaning step is by the soil of rapeseed root with running water
Rinse well.
Preferably, in one embodiment of the invention, the draining step is put into Lou for the rape after cleaning is pulled out
Draining 10-20min in basin.
Preferably, in one embodiment of the invention, the sterilisation step prepares in advance for clean rape is put into
Carry out disinfection 5-10min in good liquor natrii hypochloritis.
Preferably, in one embodiment of the invention, the concentration of the liquor natrii hypochloritis is 50-70ppm.
Preferably, in one embodiment of the invention, the pouch step is that the rape drained is weighed into 500g, is put
In the high-barrier PE bags for entering 500mm × 300mm, and rape is set to be in loose condition (of surface).
Preferably, in one embodiment of the invention, the vacuum step is that the rape after pack is put into controlled atmosphere
Packing machine, vacuumize.
Preferably, in one embodiment of the invention, the step of inflation be using high-accuracy gas mixing device to equipped with
Input O in the bag of rape2、CO2、N2Gas, its parameter value are respectively：O2Concentration is to be less than or equal to 2%, CO more than or equal to 12It is dense
Spend to be less than 23%, remaining gas N more than or equal to 20%2。
Preferably, in one embodiment of the invention, the step of sealing heaves shape completely to be in sack
State, away from being sealed at sack 2-3cm；The condition of the storage preservation is to be put into the sack of sealing in 20 ± 5 DEG C of environment
Preservation.
Further technical scheme is illustrated below by way of specific embodiment, it should be understood that following is only this
The exemplary illustration of invention, is not intended to limit the invention scope of the claims.
The fresh-keeping preparation example 1 of the rape controlled atmospheric packing of embodiment 1
Material：Fresh rape, abundant agriculture high quality agricultural productses plantation company of Beijing is purchased from, harvesting, after precooling, chooses by hand
Select suitable size, the rape of colorful green is experimental subjects, rejecting has the inferior rape such as mechanical damage, yellow blade；Packaging
Material is 0.037mm × 235mm × 245mm (thickness × length x width) polythene film bag.
Main agents：Absolute ethyl alcohol, acetone, n-hexane, ascorbic acid, oxalic acid, 2,6- dichloropheno-lindophenols, thio bar of ratio
Appropriate acid, trichloroacetic acid, sodium chloride, it is that domestic analysis is pure.
1 processing method
The fresh rapes of maturity 150g that is consistent, uniform in size, having no mechanical damage are will be singled out to be put into PE packaging bags
After row inflation, it is sealed in normal temperature environment, is sampled every 2d, is repeated 3 times per treatment group, determine its weight-loss ratio, Relative electro-conductivity
Rate, Vitamin C content, chlorophyll content, MDA (MDA) content, soluble solid, peroxidase (POD) and polyphenol
Oxidase active (PPO) activity change trend, every group is repeated 3 times；The main suitable air conditioned storage environment of experimental evidence rape, and
5 groups of gas components are set on the basis of CO2 injuries are not produced：O2, CO2, N2 volume fraction are respectively 2%, 20%,
78%, this is A groups；O2, CO2, N2 volume fraction are respectively 1.5%, 20%, 78.5%, and this is B groups；O2, CO2, N2's
Volume fraction is respectively 1%, 23%, 76%, and this is C groups；O2, CO2, N2 volume fraction are respectively 0.5%, 25%,
74.5%, this is D groups；E is air controls group.
2nd, rape performance figure determines
1) weight-loss ratio
Weight-loss ratio (%)=(fresh weight after initial fresh weight-storage)/initial fresh weight × -100%
2) relative conductivity.
It is measured with reference to Gomez [12] method, 10 circular holes (diameter 10mm) is taken from 10 leaves of rape,
Add 20mL distilled water, place 30min in 25 DEG C, the electrical conductivity (P1) of leachate is determined after stirring, after boiling water bath 10min
Cooling and standings, rape electrical conductivity (P2) is determined after stirring, P0 is blank electrical conductivity.Represent that rape is thin with relative permeability
After birth permeability size, each sample replication 3 times.Relative conductivity (%) calculates：
Relative conductivity=(P1-P0)/(P2-P0) × 100%
3) Vitamin C content.Using 2,6- dichloropheno-lindophenol titration measurings, each sample repeats
3 times.
4) chlorophyll content.
With reference to Zhang Zhiliang《Plant physiology experiment instructs》Method measure, each sample is repeated 3 times.
5) 5) enzymatic activity.The measure of POD and PPO activity is with reference to Duan Yunqing, Journal of Shanxi Agricultural University, 2005 (1)：54-
57 method.
3rd, test result
1) to the influence of weight-loss ratio：
As shown in Figure 2 a, with the extension of time, rape weight-loss ratio is in trend is gradually increasing, with prolonging for storage time
Long, different gas ratios influence difference to rape weight-loss ratio, and compared with other experimental groups, B groups are lost when storing the 35th day
Rate is minimum again.Because handling rape using disinfectant, rape storage is set to be stored in of a relatively high humidity environment
Interior, another aspect PE films play the role of few moisture evaporation, rape is kept higher moisture.
2) to the influence of rape relative conductivity
As shown in Figure 2 b, B groups best results, it is 23.24%；A groups are relative to take second place, and is 29.27%, therebetween without aobvious
Write difference (P ＜ 0.05).For D groups when storing the 35th day, electrical conductivity alreadys exceed 40%.This shows when rape is in relatively low dense
When spending oxygen content, help to slow down cell leakage increase trend, so as to delay the aging of fruits and vegetables.
3) B groups as shown in Figure 2 c, are followed successively by storage latter stage, Chlorophyll in Rape content size>A groups>C groups>D groups>E groups,
Chlorophyll content after processing is significantly higher than E groups (P ＜ 0.05).This result shows that low concentration oxygen is advantageous to suppress rape
The reduction of storage period chlorophyll content, this is due to that can suppress under low concentration oxygen and higher concentration carbon dioxide conditions
Rape respiration, rape composition is accelerated the ripening so as to delay the decomposition of Chlorophyll in Rape so as to slow down ethene, alcohols, aldehydes etc.,
Make its chlorophyll content that still there is of a relatively high content when storing 35d.High concentration oxygen accelerates rape respiration, makes oil
Dish chlorophyll declines rapidly, and commercial value is lost after 25d is stored.Simultaneously higher water vapour pressure can reduce CO2 pairs
The influence of rape.
4) to the influence of rape Vitamin C content
As shown in Figure 2 d, as storage time extends, each treatment group Vitamin C content size is followed successively by：B groups>A groups>C
Group>D groups.This shows that appropriate low concentration oxygen helps to slow down rape respiratory rate, while also inhibits the activity of oxidizing ferment,
Therefore be advantageous to keep ascorbic content in rape.
5) to the influence of rape peroxidase activity
Peroxidase (POD) is a kind of important oxide enzyme being widely present in fruits and vegetables body, and its activity is relatively
Height, its respiration with fruits and vegetables have more close relationship.As shown in Figure 2 e, E groups POD activity before storage in 15d by
Edge up height, then reduces again, gradually increased again at the 20th day, and POD activity substantially increases treatment group rape in 5d before storage
And it is active apparently higher than control group.
6) MAP handles the influence to rape polyphenol oxidase activity
The activity intensity of polyphenol oxidase (PPO) and fruits and vegetables metabolism are in close relations, when fruits and vegetables tissue or cell are destroyed
Afterwards, the oxygen in air largely invades, and in the presence of polyphenol oxidase, causes the generation of quinone and a large amount of accumulation, and further
Melanin is aggregated into, so as to reduce fruit vegetable nutrient value and commodity value.As shown in figure 2f, E groups and D groups are in preceding 10dPPO
Activity rises, and reaches peak value, has then declined respectively when storing 15d, and slowly rise, A groups, B groups, component C are other again therewith
Reach peak value in 15 d, decrease, after 35d is stored, B group PPO activity is minimum, with other treatment group significant differences (P<
0.05)。
The variation tendency of comprehensive every physiological and biochemical index shows, oxygen concentration is too high or too low is all unsuitable for rape
Preservation, the wherein gas ratio of rape preservation best results is B groups, i.e. O2, CO2, N2 volume fraction is respectively 1.5%,
20%, 78.5%.POD and PPO activity, electrical conductivity rising can effectively be suppressed under the conditions of this gas ratio, it is strong to reduce breathing
Degree, weight-loss ratio, reducing the loss of vitamin C content and delay the degraded of Chlorophyll in Rape, storage time can extend to 35d,
With good fresh-keeping effect；A groups, i.e. O2, CO2, N2 volume fraction are respectively 2%, 20%, and 78% takes second place relatively.
The fresh-keeping preparation example 2 of the rape controlled atmospheric packing of embodiment 2
Material：Fresh rape, abundant agriculture high quality agricultural productses plantation company of Beijing is purchased from, harvesting, after precooling, chooses by hand
Select suitable size, the rape of colorful green is experimental subjects, rejecting has the inferior rape such as mechanical damage, yellow blade；Packaging
Material is 0.037mm × 235mm × 245mm (thickness × length x width) polythene film bag.
Main agents：Absolute ethyl alcohol, acetone, n-hexane, ascorbic acid, oxalic acid, 2,6- dichloropheno-lindophenols, sodium chloride,
It is pure for domestic analysis.
1st, processing method
The fresh rapes of maturity 150g that is consistent, uniform in size, having no mechanical damage are will be singled out to be put into PE packaging bags
Row inflation, after sealing, stores in normal temperature environment, determines its sensory evaluation, weight-loss ratio, Vitamin C content, chlorophyll daily
Content, soluble solid., it is repeated 3 times, averages per treatment group.The main suitable air conditioned storage ring of experimental evidence rape
Border, and do not producing CO2Gas component is selected on the basis of injury：O2、CO2、N2Volume fraction be respectively 2%, 20%,
78%.Separately take air as a control group.
2nd, rape testing index and method
(1) sensory evaluation
Sensory evaluation：9 points of point systems processed.9 points to be very fresh, color is emerald green, similar during with freshly harvested；7 points be than
Comparatively fresh, the seldom outer blade tip of a part slightly turn to be yellow；5 points are that siphonal lobe turns to be yellow, but remove siphonal lobe and still receive；3 points to be poor,
Most of siphonal lobe jaundice, and have atrophy, or have rotten.
(2) weight-loss ratio
Weight-loss ratio (%)=(fresh weight after initial fresh weight storage)/initial fresh weight * 100%
(3) Vitamin C content.Using 2,6- dichloropheno-lindophenol titration measurings, each sample is repeated 3 times.
(4) chlorophyll content.
With reference to Zhang Zhiliang《Plant physiology experiment instructs》Method measure, each sample is repeated 3 times.
(5) soluble solid content determines
The measure of soluble solid content：Determined using saccharimeter, each sample is repeated 3 times.
3rd, test result
(1) influence of the controlled atmosphere to rape organoleptic quality
Sensory evaluation is one of important evaluation meanses of fruit-vegetable quality, and color, smell, quality and mouthfeel are organoleptic qualities
Major parameter, be that commodity value is most directly reacted.Within storage period, various concentrations 1-MCP processing cause rape color,
Smell, quality and mouthfeel variation are significantly (P ＜ 0.05).5 points be rape whether have commodity value boundary line, wherein not
The rape for carrying out controlled atmospheric packing loses commodity value completely when storage is to 5d, and fresh-keeping rape is carried out using controlled atmospheric packing
When storage is to 10d, organoleptic evaluation points' average out to 5.3.As shown in Figure 3, the results showed that, controlled atmospheric packing can be protected preferably
Hold the commodity value and organoleptic quality of rape.
(2) influence of the controlled atmosphere to rape weight-loss ratio
In leafy vegetable, because rape water content is higher, respiration and transpiration are persistently carried out during postharvest storage
Effect, so as to cause the increase of weight-loss ratio, therefore weight-loss ratio may indicate that the storage quality situation of rape.Fig. 2 shows, with
The extension of time, rape weight-loss ratio are in be gradually increasing trend.In storage 5d, control group rape weight-loss ratio has reached
8.80%, and controlled atmosphere group weight-loss ratio is only 2.35%.Within storage period, the increase of controlled atmosphere group weight-loss ratio is relatively slow, control group dehydration feelings
Condition is significantly higher than controlled atmosphere group.As shown in Fig. 4, the results showed that, compared with low oxygen concentration can effectively suppress rape transpiration and
Respiration, reduce weight-loss ratio.
(3) influence of the controlled atmosphere to Chlorophyll in Rape content
Chlorophyll is the important indicator for weighing leafy vegetable quality, as the ripening and senscence of vegetables, chlorophyll content are continuous
Decline.As shown in figure 4, as the extension of storage time, chlorophyll content entire lowering trend are more obvious.Pass through controlled atmosphere bag
The chlorophyll content for filling the rape relative comparison group of processing will height.The chlorophyll content of control group drops from 0d 60.74mg/Kg
It is low to store 10d, content 33.58mg/Kg to 25d 10.24mg/Kg, controlled atmosphere group chlorophyll.Controlled atmosphere group compares control group
The relatively small and downward trend of chlorophyll content fluctuation is more slow, and in storage latter stage, the chlorophyll content of controlled atmosphere group is extremely notable
Higher than control group.As a result show that controlled atmosphere is more beneficial for having delayed the decomposition of Chlorophyll in Rape.
(4) influence of the controlled atmosphere to rape Vitamin C content
Vitamin C is a kind of antioxidant in vegetable tissue, and it can be with Scavenger of ROS.As shown in figure 5, storing
Period, rape Vc contents are mainly on a declining curve, and air controls group has marked difference with treatment group, and control group Vc is being stored
It is only 10.3mg/100g during 5d, controlled atmosphere group Vc contents pole is significantly higher than control group (P ＜ 0.05).In storage 10d, controlled atmosphere
Group Vc contents are 25.97mg/100g.This shows that appropriate low concentration oxygen helps to slow down the loss of Vc contents in rape.
(5) influence that controlled atmosphere changes to rape soluble solid
Soluble solid in fruits and vegetables sample refers mainly to soluble sugar, and its content can directly reflect the maturation of fruits and vegetables
Degree and quality status, it is the important indicator for weighing fruit-vegetable quality.As shown in fig. 6, rape is in storage period soluble solid
First increase and reduce trend again；This is due to that rape causes SSC contents to rise in storage polymeric carbohydrate early stage hydrolysis,
Decline in anaphase storage SSC contents, this declines with rapeseed quality, and the increase of sucrose decomposition conversion rate is relevant.Controlled atmosphere group is in 5d
There is peak value, in anaphase storage change than shallower, when storing 10d, SSC contents are 3.5%.Air controls group is
Peaked during 3d, subsequent air controls group SSC contents decline rapidly.Test result indicates that controlled atmosphere can suppress rape SSC
Content increase, and postpones the time of occurrence on peak, and with air controls group significant difference (P ＜ 0.05).
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of rape controlled atmospheric packing preservation method, it is characterised in that comprise the following steps：
Select, clean, sterilization, drain, pack, vacuumize, inflate, seal, storage.
2. rape controlled atmospheric packing preservation method according to claim 1, it is characterised in that the selecting step is old to select
Tender moderate fresh rape, remove old leaf and rotten leaf.
3. rape controlled atmospheric packing preservation method according to claim 1, it is characterised in that：The cleaning step is with originally
Water rinses the soil of rapeseed root well.
4. rape controlled atmospheric packing preservation method according to claim 1, it is characterised in that：The draining step is will cleaning
Rape afterwards, which is pulled out, is put into draining 10-20min in Lou basin.
5. rape controlled atmospheric packing preservation method according to claim 1, it is characterised in that：The sterilisation step is will be clean
Rape be put into ready liquor natrii hypochloritis in advance the 5-10min that carries out disinfection.
6. rape controlled atmospheric packing preservation method according to claim 4, it is characterised in that：The liquor natrii hypochloritis's is dense
Spend for 50-70ppm.
7. rape controlled atmospheric packing preservation method according to claim 1, it is characterised in that：The pouch step is to drain
Rape weigh 500g, be put into 500mm × 300mm high-barrier PE bags, and rape is in loose condition (of surface).
8. rape controlled atmospheric packing preservation method according to claim 1, it is characterised in that：The vacuum step is will dress
Rape after bag is put into gas-control packing device, vacuumizes.
9. rape controlled atmospheric packing preservation method according to claim 1, it is characterised in that：The step of inflation is utilization
High-accuracy gas mixing device inputs O into the bag equipped with rape2、CO2、N2Gas, its parameter value are respectively：O2Concentration be less than 2%,
CO2Concentration is more than 20%, remaining gas N2。
10. rape controlled atmospheric packing preservation method according to claim 1, it is characterised in that：The step of sealing is to make
Sack is in heaves state completely, away from being sealed at sack 2-3cm；The condition of the storage preservation is to put the sack of sealing
Enter preservation in 20 ± 5 DEG C of environment DEG C freezer.
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