CN107347978A - A kind of extending longan shelf life method suitable for electric business logistics - Google Patents

A kind of extending longan shelf life method suitable for electric business logistics Download PDF

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Publication number
CN107347978A
CN107347978A CN201710448926.0A CN201710448926A CN107347978A CN 107347978 A CN107347978 A CN 107347978A CN 201710448926 A CN201710448926 A CN 201710448926A CN 107347978 A CN107347978 A CN 107347978A
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fruit
longan
paper
shelf life
ice bag
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韩冬梅
吴振先
李建光
郭栋梁
潘学文
李�荣
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Pomology Research Institute Guangdong Academy of Agricultural Sciences
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Pomology Research Institute Guangdong Academy of Agricultural Sciences
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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
    • A23B7/04—Freezing; Subsequent thawing; Cooling
    • A23B7/05—Freezing; Subsequent thawing; Cooling with addition of chemicals or treatment with chemicals other than cryogenics, before or during cooling, e.g. in the form of an ice coating or frozen block
    • A23B7/055—Freezing; Subsequent thawing; Cooling with addition of chemicals or treatment with chemicals other than cryogenics, before or during cooling, e.g. in the form of an ice coating or frozen block with direct contact between the food and the chemical, e.g. liquid nitrogen, at cryogenic temperature
    • 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
    • A23B7/153—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of liquids or solids

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Storage Of Fruits Or Vegetables (AREA)

Abstract

The invention discloses a kind of extending longan shelf life method suitable for electric business logistics, outer packing is made up of regular-type foam case, inside it is lined with polyethylene film freshness protection package, then the ice bag with isolation effect bubble cushion will be put, bubble chamber bottom centre position is placed on, then the longan fruit with fruit branch is uniformly placed on ice bag surrounding and top.After fruit piles with, lay thereon and accumulate consistent extending longan shelf life paper with internal foam case actinal surface, tin foil top is again coated with a barrier paper that there is trapping to hinder wet effect, finally by the flat folded sealing of freshness protection package top redundance, cover foam case lid, and case lid surrounding is tamping with tape, prevent gas leakage cold draining.The preservation method of the present invention can improve healthy fruit, extend shelf and follow-up refrigeration life-span, and and can reduces the SO in fruit2Residual quantity, improve SO in fruit heap2The uniformity of content.

Description

A kind of extending longan shelf life method suitable for electric business logistics
Technical field
The present invention relates to fruit freshness preserving technical field, in particular it relates to process for ordinary-temp antistaling of longan, more particularly, to A kind of extending longan shelf life method suitable for electric business logistics.
Background technology
Longan is one of four big fruit of south China subtropical zone (banana, citrus, lichee, longan), in the late two decades, The cultivated area and yield of longan have all reached history high level.Because longan fruit flavor is sweet, nutritious, have certain Healthcare function, it is deep to be liked by domestic and international consumer.But China longan is general ripe in heat season, breathing is vigorous, difficult With storing, pericarp is easy to brown stain, and pulp autolysis outstanding problem, loss late is up to more than 30% after reaching northern market.Plus big Batch Thailand longan uses SO2Fumigation technology, storage tolerance, commodity is good, and outward appearance is beautiful, the longan market in China is brought very big Impact.
Current domestic extending longan shelf life technology is distinguished with market category to be used, and outlet longan is with SO2Based on gas fumigation, pulp Middle SO2Residual quantity, shelf-life and shelf life can reach the requirement of bank state；Longan does not use SO generally for domestic market2Place Reason technology, one is the increase in postharvest handling flow, and two are the increase in processing cost, third, can not still be competed with Thailand longan, Basket is directly filled after general harvesting to transport, seldom makees related postharvest handling, merely with bubble chamber is on the rocks or refrigerator car, is reached as early as possible Market, and the longan fruit without postharvest handling is more in competitive disadvantages actually, outward appearance commodity is poor, is easy to brown stain, client Acceptance is low, cheap.On the opportunity of logistics now and electric business fast development, easy, safe and efficient extending longan shelf life skill Art is favorably improved fruit quality, stablizes the domestic longan fresh fruit market price, ensures plantation and sale proceeds.
Domestic existing longan sulfur burning or pure SO2Fumigation technology essentially from patented technology CN1289565A, Postharvest handling is carried out according to rational handling process, fruit can be stored more than 40 days in a low temperature of suitable, shelf life 3~5 My god, SO in pulp2Residual quantity is controlled in the range of 10~20mg/kg.On SO2The research of releasing agent, mainly using be sustained operation as It is main, see patent CN1304664A, CN1435532A and CN1170505A, utilize SO2Releasing agent sodium sulfite, hydrosulfurous acid Sodium, sodium pyrosulfite, sodium hydrogensulfite, potassium sulfite, potassium metabisulfite etc., with moisture absorption type or isolation-type auxiliary agent such as vermiculite, The material mixings such as activated carbon, perlite, starch, gelatin, citric acid, calcium stearate, diatomite, binding agent rosin together, are used Gauze or the pack of other poromeric materials, paper material interlayer is fabricated to tin foil or is fabricated directly into tablet or particle makes With.It is generally acknowledged that use SO2Sustained release agent can be such that 1~5 DEG C of longan low temperature stores 50~55 days, shelf life 2~4 days, or even recognize It can be stored 10~15 days for 25~35 DEG C.SO is there are no in normal temperature bubble chamber transporting procedures2Preservation technology application report.
Existing longan closely using large bamboo or wicker basket or plastic crate packed mostly by normal temperature storing, with blade liner or covering； Find a good sale in more by the way of bubble chamber bottle on the rocks, ice bag, even scattered ice, especially the fresh longan of electric business logistics transportation is important Mode, its fresh-keeping effect is relevant with ice amount, and ice amount is big, and fresh keeping time length, transportation range is remote, but cost is high, with the market Thailand longan can not form competitiveness, cause benefit to increase income not ideal enough, be of limited application.The weak point of this method is main It is：A, outstanding problem is taken out after fruit stores and transports a period of time in bubble chamber, and surface condensation water causes fruit table color after drying Damp obvious dimmed, in dark green brown or dark brown, commodity significantly reduces.B, the fruit directly contacted with ice body, can be by Different degrees of frostbite, room temperature is put after outlet or continues to refrigerate, it is easier to brown stain.C, it is not in place due to adopting the preceding prevention and control of plant diseases, pest control Or inferior quality, rear precooling deficiency is adopted, continues refrigeration or room temperature storage after fruit storing, outlet, the shelf-life is shorter, fruit Brown stain, go rotten speed.
Existing longan SO2Tin foil or freshness protection package, subject matter are following several respects：A, spacetabs type is belonged to.Protecting Fresh bag or tin foil slowly during release, if long-term low concentration acts on, cause SO2Accumulate in the cell, residual quantity is significantly Rise, fresh-keeping effect is not as good as control.Extending longan shelf life paper in the present invention belongs to puts type soon, using acid release enhancing agent, abandons other All kinds of obstructive sustained release auxiliary agent or isolation-type paper-plastic stick paper envelope materials, ensure that tin foil occurs for 1~2 day after low temperature storage Obvious action effect, room temperature or Mild Hypothermal (ice bag insulation) are stored 0.5~2.0 hour and had an effect.b、SO2Gas acts on Inhomogeneities, point-like arrangement antistaling agent can cause diverse location fruit uptake produce larger difference, so as to bring SO2 Residual quantity is uneven, fruit healthy fruit reduces.C, SO in fruit2The non-intellectual of residual quantity.Current domestic fresh fruit SO2Residual quantity standard It is no more than 50mg/kg (NY/T844-2010 standards, GB2760-2011《Food additives use sanitary standard》), world mark Can standard be no more than 10mg/kg (US FDA standard), and weigh the technology and be applicable the key criterion of production.Existing longan is delayed The using effect of agent is released, the SO after being not directed to the technical finesse mode of the problem and storing2It is horizontal.SO is indicated in the present invention2 The mass ratio of amount of release agent and fruit amount is between 0.05%~0.5%, and fruit heap acts on thickness between 3~15cm, so not SO in fruit heap can only be ensured2Even action, and pulp SO can be controlled2Residual quantity.
The content of the invention
The invention aims to overcome the deficiencies in the prior art, there is provided a kind of extending longan shelf life suitable for electric business logistics Method.The preservation method of the present invention can improve healthy fruit, extend shelf and follow-up refrigeration life-span, and and can is reduced in fruit SO2Residual quantity, improve SO in fruit heap2The uniformity of content.
To achieve these goals, the present invention is achieved by following scheme：
A kind of extending longan shelf life method suitable for electric business logistics, comprise the following steps：Outer packing is made up of regular-type foam case, Polyethylene film freshness protection package is inside lined with, then will put the ice bag with isolation effect bubble cushion, is placed on bubble chamber bottom interposition Put, then the longan fruit with fruit branch is uniformly placed on ice bag surrounding and top, after fruit piles with, lay thereon and inside The consistent extending longan shelf life paper of bubble chamber open area, tin foil top hinder the barrier paper of wet effect coated with one with trapping again, most Afterwards by the flat folded sealing of freshness protection package top redundance, foam case lid is covered, and case lid surrounding is tamping with tape, prevents gas leakage Cold draining.
Preferably, the longan fruit with fruit branch first carries out following preceding processing before vanning：After ripe longan harvesting, The health for being adapted to storage, the fruit of normal development are picked out, maturity 85%~95%, retains 10~15cm of long fruit branch, is used 500mg/kg P applied levels soak 2 minutes, take out, dry 2~3 hours in 18~22 DEG C of air conditioning chambers or enter freezer precooling 3~5 Hour, to 5~15 DEG C or so of fruit temperature.
Preferably, the longan fruit with fruit branch first carries out following preceding processing before vanning：Harvested in longan fruit In first 1~7 day, in spraying antistaling agent on tree, 10~15cm of long fruit branch is retained after harvesting, picks out the health, just for being adapted to storage The fruit often developed, in air conditioning chamber's precooling 2~5 hours or enter freezer precooling.
Preferably, the weight ratio of the longan fruit and ice bag is 3~5：1.
Preferably, the extending longan shelf life paper comes from patent CN201610227849.1 and CN201610227848.7, utilizes Numerous food level SO2Agent is released based on releasing agent, to release acid substance as release enhancing agent, with degradable non-poisonous type tea bag non-woven fabrics, filtering The water-permeable and air permeable section bar material such as cotton paper, pin hole paper-plastic stick paper, brown paper are envelope material, using the composite plastic paper of water proof choke as base material, Using safe and non-toxic solvent-type acrylic ester pressure-sensitive as laying carrier, or with safe and non-toxic, water proof choke the compound back of the body Gummed paper (base material and laying carrier complex) is supporting body, the tin foil for being specially adapted for longan is prepared into, with fast in fruit case Quick-release puts SO2Gas is form, reaches rapid, uniform, efficient action effect, can not only improve fruit appearance quality, subtract Few pericarp browning and pulp autolysis, extend storing phase and shelf life, additionally it is possible to SO in uniform fruit2Residual quantity and control in state As defined in family in critical field.The application of the technology is to improve the outward appearance marketing quality of normal temperature bubble chamber transport longan, extended Shelf life, keep follow-up cold storage quality, it is developed and successful application, be beneficial to south China longan improve commodity quality, Extend post harvest transport and shelf life, improve northern market acceptance, meet the consumption demand in market, before there is good market Scape.
Compared with prior art, the present invention has the advantages that：
The present invention utilizes SO2Good color protection effect, improve fruit table color and luster, switch to the dim mute brown of fruit appearance itself Vivid, clean yellow green or isabelline, the exterior of commodity of fruit is significantly improved, improve market value, and its it is imperial with Thailand The competitiveness of eye.By suitable precooling measure etc. after selecting high-quality fruit, adopting, delay or even suppress fruit and store and transport, after outlet Brown stain, problem of rotting, improve healthy fruit, extend shelf and follow-up refrigeration life-span.By improving tin foil production quality, reserving Suitable fruit branch length and uniform fruit accumulation mode, reduce the SO in fruit2Residual quantity, improve SO in fruit heap2Content it is equal Even property.
Brief description of the drawings
Fig. 1 is that extending longan shelf life paper normal temperature stores and transports application schematic diagram.
Fig. 2 is tin foil shape.
Fig. 3 is that normal temperature stores and transports manner of packing in bubble chamber.
Fig. 4 is August in 2016 26, stores up good longan fruit and the state after 40hr is encapsulated in bubble chamber, pericarp is uniform Bright yellow green, no brown stain, without rotten.
After Fig. 5 is the good fruit joint sealing 40hr of 2016.08.26 tin foils processing storage, after 25 DEG C of shelf place 4d, healthy fruit ＞ 85%, fruit table yellowish-brown.
Fig. 6 is September in 2016 9, and Raoping swath kind longan fruit seals the state after 40hr up for safekeeping in bubble chamber, processing PS1 and PS2 fruit surfaces are uniform yellow green, hence it is evident that vivider than control PCK1, commodity is preferable.
Embodiment
The present invention is made with reference to Figure of description and specific embodiment and further being elaborated, the embodiment It is served only for explaining the present invention, is not intended to limit the scope of the present invention.Test method used in following embodiments is such as without spy Different explanation, is conventional method；Used material, reagent etc., unless otherwise specified, for the reagent commercially obtained And material.
As shown in figure 1, the application mode of extending longan shelf life paper is as follows in the present invention：Outer packing is made up of regular-type foam case, interior Polyethylene film freshness protection package is lined with, then will put the ice bag with buffer action bubble cushion, is placed on bubble chamber bottom centre position, The longan fruit with fruit branch is uniformly placed on ice bag surrounding and top again.After fruit piles with, lay steeped with internal thereon Foam case actinal surface accumulates consistent extending longan shelf life paper, and tin foil top is again coated with a barrier paper that there is trapping to hinder wet effect.Finally By the flat folded sealing of freshness protection package top redundance, foam case lid is covered, and case lid surrounding is tamping with tape, prevents gas leakage from leaking It is cold.
Embodiment 1
A kind of extending longan shelf life method suitable for electric business logistics, comprise the following steps：
Pre-treatment：There are 2 kinds of processing modes before fruit vanning, one kind is after ripe longan harvests, to pick out and be adapted to storage Health, the fruit of normal development, maturity 85%~95%, retain 10~more than 15cm of long fruit branch, with 500mg/kg P applied levels Soaked 2 minutes Deng fresh-keeping liquid, take out, dried 2~3 hours in 18~22 DEG C of air conditioning chambers, or enter freezer precooling 3~5 hours, To 5~15 DEG C or so of fruit temperature.Another kind is before harvesting in 1~7 day, in spraying the fresh-keeping liquids such as 500mg/kg P applied levels on tree, Retain long fruit branch after harvesting, select, air conditioning chamber's precooling 2~3 hours, or enter freezer precooling.
Vanning：Correct amount, be fitted into be lined with polythene film bag, bag inner bottom part is placed with the bubble chamber of ice bag, " fruit：Ice " Than about " 3~5:1”.Fruit is uniformly laid, ensures to leave preferable venting capability between fruit.Place at the top of fruit heap and press in advance Amount of release agent, the paper size tin foil (Fig. 2) made consistent with basketry mouth area are calculated according to fruit weight, then The insulation blocking materials such as sponge paper or blotting paper, foam paper, brown paper coated with same size, seal (Fig. 3).There is bar Part can be protected in jacketed one layer of more solid carton, reinforcement outside bubble chamber.
Delivery：Delivery in time, be preferably selected enjoy a good reputation, the rapid ecommerce of logistics and logistics company, ensure kinds of goods Reached in effective freshness date in client's hand.
Storing：During logistics stores and transports, forbid to tumble or be inverted fruit case, keep case top upward.Shady and cool storing is kept as far as possible Environment, it is sure not open-air exposure, handles with care, prevents package failure.
Unpacking and shelf：Longan fruit through the fresh-keeping transport of this method, joint sealing time preferably between 30~45 hours, unpack Healthy fruit 95~100% afterwards, pericarp yellow green or yellowish-brown, SO in pulp2Residual quantity is between 5~50ppm；Open bag After dress, in air-conditioned room or fan drying fruit table moisture, for 25 DEG C of air-conditioned room shelf life at 3~5 days, pericarp is inside and outside to keep not brown Become；Fruit then obvious brown stain is compareed, healthy fruit is almost 0, and resistance to storage kind browning degree is slightly light.
Low temperature is continuous to be hidden：The fruit of surface moisture is dried after unpacking, is sealed with polythene film bag, places refrigerator or 3 ~5 DEG C of Storage in cold bank.Foam case lid can also be opened, but not open inner packing, directly go to the continuous Tibetan of freezer, after 1 month, Healthy fruit is more than 85%.
Embodiment 2
Hainan stone gorge on July 25th, 2016 " bubble chamber+extending longan shelf life paper " is tested
Material：Kind stone gorge, from Haikou, 85~90% maturity, less than normal, breen.Bubble chamber general thickness.
Pre-treatment：Harvesting the previous day sprays 500ppm P applied levels to fruit, the next morning harvesting, when 36 DEG C of daily temperature, Cool nearly 2 hours in shady place precooling.Routine is selected, and retains more than long fruit branch 15cm.CK is compareed without using tin foil, S1-1 The use of tin foil is 0.10% concentration with S1-2, S2-1 and S2-2 are 0.20% concentration using tin foil.
Packaging and storing：Per case 5kg fruits, uniformly lay.Pad 0.02mm thick polyethylenes inside wherein S1-2 and S2-2 Bag film (PE), S1-1 and S2-1 processing are without bag film.A tin foil, 3 layers of blotting paper of overlying are placed at the top of fruit heap.Per case fruit The real ice bag (300~400g/) for placing 2 overcoat bubble bags, fruit ice ratio about 6:1.12 points start to pack in July 25, under Lead to express delivery in 4 points or so of noon and be sent to Guangzhou, receive and unpack at 4 points in afternoon July 26, joint sealing time 30hr or so.
As a result：Nearly 30 hours after fruit joint sealing, unpacked after transporting Guangzhou laboratory to.Due to being protected outside bubble chamber without carton Shield, CK2 and S2-2 bubble chambers are damaged, and crack or leak occur.
After opening, control fruit keeps breen during harvesting, but dimer；Processing fruit fades to some extent, is in Bright yellow green.Fruit color from shallow bright yellow green to dimness breen, be sequentially：S2-2、 S1-2、S2-1、S1- 1st, CK, illustrate that pad P E films advantageously reduce sulfur dioxide gas seepage, effect is preferable；Antistaling agent dosage it is high better than dosage it is low 's；CK fruit colors are most dark.
Fruit levels fruit color is handled all than more uniform, no appearance browning phenomenon；In addition to dehiscent fruit caused by indivedual be squeezed, Preferably fruit, without phenomenon of going rotten；Fruit table is moister.Compare fruit also equal preferably fruit.Healthy fruit is 100%.
Sulfur dioxide smell is thin, unobvious.Pulp SO2Residual quantity is not exceeded to be shown in Table 1, in the range of national standard (being no more than 30mg/kg).
Table 1 is that 20160725 Hainan bubble chambers handle pulp SO2Content
S1-2 and S2-2 is after 5 DEG C of Storage in cold bank 1 month, and healthy fruit is close to 90%；S1-1 and S2-1 fruit polyethylene After the preservation of refrigerator cold-storage lattice being placed after bag film packaging 15 days, healthy fruit is also more than 90%.
25 DEG C of shelf life 4 days, healthy fruit more than 95%, pericarp keep yellow green, no brown stain.
Embodiment 3
Guangxi Yulin stone gorge " bubble chamber+extending longan shelf life paper " experiment on the 16th of August in 2016
Material：Kind stone gorge, from Guangxi Yulin, 85~90% maturity, breen.Bubble chamber general thickness.It is fresh-keeping Paper concentration：0.05%th, 0.15% and 0.25% 3 gradient, numbering are respectively：YS1-0.05%, YS2-0.15%, YS3-0.25%, YS4-0.25%, YCK1-control, YCK2-control.
Fruit pre-treatment：Spray sterilization processing is not made before adopting, more than 36 DEG C of daily temperature is worked as in harvesting, without foot after fruit harvesting The enough time carries out radiating precooling, and joint sealing is packed after arrangement.Routine is selected, and stays long fruit branch.
Packing method：Per case 5kg fruits, tin foil is placed at the top of fruit heap, overlying isolates brown paper,.Fruit heap and bubble chamber Between be lined with 0.02mmPE bags.Every layer of fruit places 2 ice bags (about 400g, overcoat bubble bags), fruit ice ratio about 6:1.
Storing：After air-conditioned coach transports Guangzhou laboratory back, joint sealing time 32hr or so unpacks by CK1, YS1, YS2, YS3, CK2 and YS4 is in 18 afternoon 15 of August:00 unpacks, joint sealing time 53hr.
As a result：Fruit surface is moister, exocarp yellow green, and levels colour fading is more uniform, and control fruit color ratio is dark when harvesting Light, fading extent increases and strengthened with tin foil concentration.Healthy fruit 100%.
Pulp sulfur dioxide residual quantity is shown in Table 2, (is no more than 30mg/kg) in the range of national standard.
During 25 DEG C of shelf life 4 days, for healthy fruit between 80%~85%, pericarp keeps yellow green, no brown stain.
The Guangxi Yulin bubble chamber stone gorge pulp SO of table 2 201608172Residual quantity
Embodiment 4
Store up good " bubble chamber+extending longan shelf life paper " experiment in the Guangzhou on the 24th of August in 2016
Material：Kind storage is good, from Guangzhou, maturity 90%~95%.Adopt preceding 2 days fruits and spray 500ppm P applied levels. Retain more than long fruit branch 15cm, 400g ice bags 1, case inner liner 0.02mmPE bags after adopting.
Pre-treatment：Control is 0.25% with four kinds of processing tin foil concentration, and difference is in packing processes, is labeled as： CCKS4 --- top tin foil 1 opens+and barrier paper 1 opens；CS14 --- top tin foil 1 opens+and barrier paper 1 opens, on the barrier paper of top 3 layers of blotting paper；SC15 --- top tin foil 1 opens+and barrier paper 1 opens, 5 layers of blotting paper on the barrier paper of top；CS16 --- top Tin foil 1 opens+and barrier paper 1 opens, 3 layers of sponge paper on the barrier paper of top；CS17 --- top tin foil 1 opens+and barrier paper 1 opens, pushes up Each 1 sponge paper of portion's barrier paper and Guo Dui bottoms；
2.5kg fruits/case, fruit transport laboratory back, and 23 DEG C of air-conditioned rooms are cooled down 2~3 hours, and joint sealing is packed after selecting fruit.Envelope The case time is about 40hr.
As a result：All processing fruits uniformly fade, and exocarp is bright yellow green, more satisfactory (see Fig. 4).Pushed up after opening Barrier paper, blotting paper, the sponge paper in portion are showed no obvious moist phenomenon, and only CS14 and CS16 small areas are moist.Fruit surface It is slightly moist, but without seeping phenomenon.Healthy fruit is shown in Table 3, except CS16 processing be 94.44% in addition to, it is other processing 97~100% it Between.SO in pulp2Content is shown in Table 3, not exceeded.During 25 DEG C of shelf 4 days, between 82%~93%, pericarp is kept healthy fruit Yellow green, no brown stain (see Fig. 5).
Table 3 is that healthy fruit statistics after good normal temperature bubble chamber processing is unpacked is stored up in Guangzhou
Table 4 is that the good unpacking pulp SO of normal temperature bubble chamber processing fruit is stored up in Guangzhou2Content
Embodiment 5
Raoping swath kind " bubble chamber+extending longan shelf life paper " experiment on the 7th of September in 2016
Material：Kind swath kind, from Raoping County of Guangdong Province.Maturity 90~95% or so, do not sprayed before adopting.Fruit is protected Stay long fruit branch.500g ice bags, pad 0.02mmPE bags.Tin foil concentration is 0.25%, has used 2 kinds of envelope materials, has marked respectively For envelope material 1 and envelope material 2.
Pre-treatment：Tin foil concentration is 0.10%, including following processing：PCK1 --- normal temperature compares, and does not put tin foil, PS1 --- 1 tin foil, material 1 is sealed, bottom sponge paper 1 is opened, and top ox-hide opens+3 blotting papers every paper 1, PS2 --- 1 guarantor Fresh paper, material 2 being sealed, bottom sponge paper 1 is opened, and top ox-hide opens+3 blotting papers every paper 1, PS3 --- same to PS1, fruit are packed with PE After 5 DEG C of freezers deposit 12hr, then change bag and enter bubble chamber, place tin foil, PS4 --- same to PS2, fruit packed with PE after with After 5 DEG C of freezer storage 12hr, then change bag and enter bubble chamber, place tin foil.
More than processing be to unpack after joint sealing 40hr, sampled after unpacking, send SO in Guangzhou test center detection pulp2Contain Amount.
As a result：Unpacked after joint sealing 40hr, surface is every paper and blotting paper humidity unobvious；Fruit surface is micro- wet；PS2 fruit color ratios PS1 is shallow bright, the equal free from extraneous odour of tin foil；Without decayed fruit, indivedual slight brown stains of endocarp.PS4 fading effects are better than PS3, are bright Yellow green, fruit table is micro- wet (see Fig. 6).
Healthy fruit is shown in Table 5, compares healthy fruit 100%, and PS1~PS4 with the presence of a small amount of brown stain fruit, healthy fruit because be less than PCK.Generally speaking, upper strata healthy fruit is higher than lower floor, or close.Due to swath kind grown place apart from the Guangzhou laboratory range of driving about 6 hours, fruit test process space before overlong time, therefore fresh-keeping effect is slightly poorer to stone gorge and Chu Liang.Same processing fruit, Freezer precooling is similar to the healthy fruit of non-precooling；But the fruit of same precooling treatment, envelope material 2 effect are recommended better than envelope material 1 The tin foil made of envelope material 2.
SO2For content not detect, detection is limited to 1.0mg/kg (being shown in Table 5).During 25 DEG C of shelf life 3 days, healthy fruit is 80% Between~85%, pericarp keeps yellow green, no brown stain.
Table 5 is 20160907 Raoping swath kind normal temperature bubble chamber healthy fruit statistics
Above-described embodiment is served only for explaining the present invention, is not intended to limit the scope of the present invention.

Claims (4)

  1. A kind of 1. extending longan shelf life method suitable for electric business logistics, it is characterised in that comprise the following steps：Outer packing is by commonly steeping Foam case is formed, and is inside lined with polyethylene film freshness protection package, then will be put the ice bag with isolation effect bubble cushion, be placed on bubble chamber bottom Portion centre position, then the longan fruit with fruit branch is uniformly placed on ice bag surrounding and top；
    After fruit piles with, lay accumulate consistent extending longan shelf life paper with internal foam case actinal surface thereon, tin foil top again coated with One has the barrier paper that trapping hinders wet effect, finally by the flat folded sealing of freshness protection package top redundance, covers foam case lid, and Case lid surrounding is tamping with tape, prevents gas leakage cold draining.
  2. 2. according to the method for claim 1, it is characterised in that the longan fruit with fruit branch is first carried out before vanning Following pre-treatment：After the harvesting of ripe longan, the health for being adapted to storage, the fruit of normal development are picked out, maturity 85%~95%, Retain 10~15cm of long fruit branch, soaked 2 minutes with 500mg/kg P applied levels, take out, it is small to dry 2~5 in 15~22 DEG C of air conditioning chambers When or enter freezer precooling 3~5 hours, to 5~15 DEG C or so of fruit temperature.
  3. 3. according to the method for claim 1, it is characterised in that the longan fruit with fruit branch is first carried out before vanning Following pre-treatment：Before longan fruit harvesting in 1~7 day, retain in spraying antistaling agent on tree, after harvesting long fruit branch 10~ 15cm, the health for being adapted to storage, the fruit of normal development are picked out, in air conditioning chamber's precooling 2~5 hours or enter freezer precooling.
  4. 4. according to the method for claim 1, it is characterised in that the weight ratio of the longan fruit and ice bag is 3~5：1.
CN201710448926.0A 2017-06-14 2017-06-14 A kind of extending longan shelf life method suitable for electric business logistics Pending CN107347978A (en)

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