CN105410162A - Small-package controlled atmosphere preservation method of sweet cherries - Google Patents
Small-package controlled atmosphere preservation method of sweet cherries Download PDFInfo
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- CN105410162A CN105410162A CN201510891749.4A CN201510891749A CN105410162A CN 105410162 A CN105410162 A CN 105410162A CN 201510891749 A CN201510891749 A CN 201510891749A CN 105410162 A CN105410162 A CN 105410162A
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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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Abstract
The invention relates to a small-package controlled atmosphere preservation method of sweet cherries. The small-package controlled atmosphere preservation method comprises the following steps: in the morning of sunny days, picking sweet cherries which have mid-late maturity varieties, have no mechanical loss and rot, and have uniform color and luster; storing at 25 DEG C for 5 days; determining the rot rate, color difference and hardness of the sweet cherries before and after storage; taking the sweet cherry variety with the change of three indexes, which is less than 10%, as a small-package controlled atmosphere preservation variety; in the morning of sunny days, picking the sweet cherries and keeping stems of the sweet cherries; selecting the sweet cherries with uniform color and luster and eliminating the sweet cherries with the mechanical loss and rot; putting the sweet cherries into pre-cooling air drying equipment, washing the sweet cherries with cold water and pre-cooling the sweet cherries to 2-7 DEG C; drying the sweet cherries with air until no water is remained and immediately carrying out the next step; taking 200g of the sweet cherries which are dried with the air and putting the sweet cherries into a polypropylene package box which is internally padded with water absorption paper; packaging the box by using a controlled atmosphere packaging machine, wherein the volume percent of mixed gas in the packaged polypropylene package box is as follows: 3%-7% of O2, 10%-20% of CO2 and the balance of nitrogen gas; and putting the sweet cherries subjected to controlled atmosphere packaging into a refrigeration house at a temperature ranging from -1 DEG C to 1 DEG C and storing.
Description
Technical field
The present invention relates to a kind of sweet cherry inner wrapping air regulating fresh-keeping method, belong to postharvest technology of fruits and vegetables field.
Background technology
Sweet cherry has another name called large cherry, gean, is the rose family, Prunus, cherry Subgenus, and primary in Europe, the African northwestward and western part of Asia, 19 century 70s import China into.Record according to " fruit tree in Manchuria " 1915, American missionary J.L.Nevius in 1871 has brought the sweet cherry nursery stock of first batch of 10 kinds, sour cherry and hybrid cherry nursery stock kind into and has planted in mountain, the southeast, Yantai, Shandong.Sweet cherry be northern China deciduous fruit tree relaying cherry after fruit maturation fruit tree species the earliest.There are cherry, sweet cherry, sour cherry and Nanking cherry in China as the cherry of cultivation of fruit tree, and sweet cherry is compared with other three classes cherry, and fruit is individual large, and fruit is heavily 3-5 times of other cherry, and bright in colour, aromatic flavour, sugariness is higher.The sweet cherry variety of domestic plantation mainly contain beautiful morning, pioneer, Sa meter Tuo, La Binsi, that father-in-law, thunder Buddhist nun, Italy early red, red light, large purple, Zhifu is red, early large fruit, red gorgeous, triumphantly and the kind such as friendship.
Sweet cherry fruit skin is thin, succulence, high-temperature high humidity season at a time when gathering, adopt that rear easy generation is rotted, brown stain, dehydration, the problem such as softening and concentrating picking time, be both difficult to the demand meeting fresh trencherman, be also difficult to the economic benefit improving cherry industry.In order to extend the supply phase of sweet cherry, realize the benign cycle of producing and selling, consumption market, the storage technique of sweet cherry seems particularly important.Therefore, carry out the research to sweet cherry preservation technique, reduce the quality of the loss after sweet cherry harvesting and raising product, day by day become the problem that each side is paid close attention to.Developing a kind of comparatively ideal sweet cherry preservation method, extending the shelf life of sweet cherry to promoting that the development of cherry industry has important impetus.
The cherry preservation technique studied at present and use mainly contains: deepfreeze is fresh-keeping, pressure-reducing fresh-keeping, high pressure are fresh-keeping, radiation preservation, coating-film fresh-keeping and controlled atmosphere etc., they all have certain fresh-keeping effect to sweet cherry.Wherein low temperature is the main factor extending the fruit storage phase, and other method for storing and refreshing also substantially all carry out fresh-keeping to fruit based on low temperature.Sweet cherry refrigeration preference temperature is-1 DEG C-1 DEG C, and relative humidity is 90%-95%, and with this understanding, the storage period of sweet cherry is 30-40 days.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of sweet cherry inner wrapping air regulating fresh-keeping method, and this method is packed sweet cherry by controlled atmospheric packing (MAP) technology, by reducing initial O in packing box
2concentration and increase CO
2concentration slows down the respiratory intensity of sweet cherry, delays the ripening and senscence of sweet cherry and the release of ethene, and the fungus growth suppressing to cause cherry to rot and diffusion, thus reach the fresh-keeping object of sweet cherry.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of sweet cherry inner wrapping air regulating fresh-keeping method, comprising:
1) in fine day early morning, pluck and have no mechanical damage, without middle-late ripening variety sweet cherry that is rotten, uniform color, preserve after 5 days for 25 DEG C, measure the rotting rate of sweet cherry before and after preserving, aberration (referring to that sweet cherry pericarp color changes) and these three indexs of hardness, choose above-mentioned three indexs change and be all less than the sweet cherry variety of 10% as inner wrapping controlled atmosphere kind;
Rotting rate calculates as follows:
Aberration color difference analysis instrument measures.Select the sweet cherry of uniform color to put into sample determination window, measure its lightness (brightness) L
*value, a
*and b
*, and calculate colorfulness (saturation degree) C
*, C
*value computing formula is as follows, often organizes mensuration 10 sweet cherries, calculating mean value.
Hardness instrumental test.Location parameter is as follows: pop one's head in as TA39, and climbing speed of popping one's head in after probe fall off rate, test rate and test before test is 0.5mm/s, and the distance of probe compression sample is 6mm, induction force 3g.Often organize mensuration 10 sweet cherries, calculating mean value.
2) inner wrapping controlled atmosphere process:
2.1) in fine day early morning, 1 is plucked) sweet cherry variety determined, retain the carpopodium of sweet cherry, select the sweet cherry of uniform color, reject the sweet cherry having mechanical damage and rot;
2.2) by 2.1) sweet cherry plucked puts into precooling apparatus for drying, cleans and be pre-chilled to 2-7 DEG C with cold water, air-dry to do not have water stain after carry out next step immediately;
2.3) get 200g2.2) air-dry after sweet cherry, be placed in and be lined with in polypropylene (Polypropylene, the PP) packing box of blotting paper, pack with gas-control packing device, after packaging, the percent by volume of mist is in packaging polypropylene box: O
23%-7%, CO
210%-20%, all the other are nitrogen, the scope of above-mentioned mist percent by volume, can be used for the fresh-keeping of various middle-late ripening variety sweet cherry, and sweet cherry variety is different, and the percent by volume of three kinds of gases is different;
2.4) by 2.3) sweet cherry that controlled atmospheric packing the is good freezer that is placed in-1 DEG C-1 DEG C stores.
On the basis of technique scheme, the present invention can also do following improvement.
Further, 2.3) in, the specification of described packaging polypropylene box is long 200mm* wide 140mm* height 45mm.
Further, 2.3) in, the parameter of described gas-control packing device packaging is: pumpdown time 2s, and fill gaseous mixture time 2s, vacuumizing with the time interval of filling gaseous mixture is 0s, heat-sealing time 2s, heat-sealing temperature 165 DEG C.
The first selected Mid-late ripening sweet cherry of resistance to storage of the present invention is as fresh-keeping object, measure and preserve different times sweet cherry rotting rate, pericarp color change, the hardness of fruit, soluble solid content, titratable acid content, nutritive loss and changes of contents etc. that is ripe with cherry and old and feeble relevant enzyme, draw the controlled atmospheric packing initial gas ratio that applicable each kind sweet cherry stores.
Compared with General low temperature preservation technique, the gas regulation package and fresh keeping technology that the present invention selects can control the initial O in sweet cherry fresh-keeping environments
2concentration and CO
2concentration, by reducing O
2concentration and increase CO
2concentration reduces the respiratory intensity of sweet cherry and the release of ethene, and can the growth of mould fungus inhibition, and the sweet cherry that mould fungus inhibition causes rots, thus extends the freshness date of sweet cherry, reduces drying loss, and can keep good color and luster and quality during accumulating.
Compared with low temperature controlled atmosphere cold preservation technique, the present invention adopts controlled atmospheric packing technology, does not need to use controlled atmosphere cold, only needs to control the gas in packing box in microenvironment, can save the expense using controlled atmosphere cold.The fresh-keeping sweet cherry of controlled atmosphere inner wrapping has packaging independence, and the air-tightness in packing box loses the sweet cherry that can not affect other packagings, on the sweet cherry that the sweet cherry in controlled atmospheric packing box has mould contamination also can not be diffused in other packing boxes.
The present invention also possesses following advantage:
1. environmental protection and safety, packaging material stable in properties used, does not discharge harmful substance in extreme temperatures, and gases used is O
2and CO
2, safe and harmless.
2. use inner wrapping controlled atmosphere sweet cherry, can continue to maintain low O in transport and selling period
2high CO
2closed environment, make sweet cherry during transportation and sales, keep good color and luster and quality.
Show through contrast test, the inventive method makes sweet cherry at initial gas volume ratio be: O
23%-7%; CO
210%-20%, all the other are packaging also Cord blood under the condition of nitrogen, and freshness date reaches more than 3 months.Within whole storage period, the sweet cherry of application above-mentioned gas ratio controlled atmospheric packing is compared with other gas ratio groups, and rotting rate is minimum, aberration and firmness change less, soluble solid and titratable acid content underspeed and slow down, and vitamin B1 content is without obvious decline.
Accompanying drawing explanation
Figure 1A is that Rabin's Si cherry is at the initial CO of difference
2the variation diagram of rotting rate during air conditioned storage under gas concentration;
Figure 1B is that Rabin's Si cherry is at the initial O of difference
2the variation diagram of rotting rate during air conditioned storage under gas concentration;
Fig. 2 A is that Rabin's Si cherry is at the initial CO of difference
2lightness (L during air conditioned storage under gas concentration
*) variation diagram;
Fig. 2 B is that Rabin's Si cherry is at the initial O of difference
2lightness (L during air conditioned storage under gas concentration
*) variation diagram;
Fig. 3 A is that Rabin's Si cherry is at the initial CO of difference
2the variation diagram of chroma (C*) during air conditioned storage under gas concentration;
Fig. 3 B is that Rabin's Si cherry is at the initial O of difference
2the variation diagram of chroma (C*) during air conditioned storage under gas concentration;
Fig. 4 A is that Rabin's Si cherry is at the initial CO of difference
2the variation diagram of hardness during air conditioned storage under gas concentration;
Fig. 4 B is that Rabin's Si cherry is at the initial O of difference
2the variation diagram of hardness during air conditioned storage under gas concentration;
Fig. 5 A is that Rabin's Si cherry is at the initial CO of difference
2the variation diagram of soluble solid content during air conditioned storage under gas concentration;
Fig. 5 B is that Rabin's Si cherry is at the initial O of difference
2the variation diagram of soluble solid content during air conditioned storage under gas concentration;
Fig. 6 A is that Rabin's Si cherry is at the initial CO of difference
2the variation diagram of titratable acid content during air conditioned storage under gas concentration;
Fig. 6 B is that Rabin's Si cherry is at the initial O of difference
2the variation diagram of titratable acid content during air conditioned storage under gas concentration;
Fig. 7 A is that Rabin's Si cherry is at the initial CO of difference
2the variation diagram of vitamin B1 content during air conditioned storage under gas concentration;
Fig. 7 B is that Rabin's Si cherry is at the initial O of difference
2the variation diagram of vitamin B1 content during air conditioned storage under gas concentration.
Detailed description of the invention
Be described principle of the present invention and feature below, example, only for explaining the present invention, is not intended to limit scope of the present invention.
In the present invention, if not refer in particular to, all gas ratios are volume ratio (V/V), and all devices and raw material are all buied from market.
Capital equipment in the embodiment of the present invention and raw material illustrate:
Oxygen, carbon dioxide and nitrogen: Yantai hovering kite gas Co., Ltd buys.
Precooling apparatus for drying used is cherry screening precooler, and model: XGJ-YT, Longkou Kai Xiang Machinery Co., Ltd. buys.
Gas-control packing device, model: QDW-380, Yi, Shanghai Lang plant equipment Co., Ltd buys.
Embodiment 1
A kind of Rabin's Si cherry inner wrapping air regulating fresh-keeping method, comprising:
1) in fine day early morning, pluck 1kg to have no mechanical damage, without Rabin's Si cherry that is rotten, uniform color, after preserving 5 days at 25 DEG C, measure the rotting rate of Rabin's Si cherry before and after preserving, chromatic aberration and hardness number, after measured, the change of Rabin's Si cherry rotting rate, chromatic aberration and hardness number is all less than 10%, can be used as the present invention's raw material of resistance to storage;
Rotting rate calculates as follows:
Aberration color difference analysis instrument measures.Select Rabin's Si cherry of uniform color to put into sample determination window, measure its lightness (brightness) L
*value, a
*and b
*, and calculate colorfulness (saturation degree) C
*, C
*value computing formula is as follows, often organizes mensuration 10 Rabin's Si cherries, calculating mean value.
Hardness instrumental test.Location parameter is as follows: pop one's head in as TA39, and climbing speed of popping one's head in after probe fall off rate, test rate and test before test is 0.5mm/s, and the distance of probe compression sample is 6mm, induction force 3g.Often organize mensuration 10 Rabin's Si cherries, calculating mean value.
2) in fine day early morning, pluck Rabin's Si cherry, retain the carpopodium of Rabin's Si cherry, select Rabin's Si cherry of uniform color, reject the Rabin's Si cherry having mechanical damage and rot;
3) by 2) Rabin's Si cherry of having plucked puts into precooling apparatus for drying, cleans and be pre-chilled to 2-7 DEG C with cold water, air-dry to do not have water stain after carry out next step packaging of weighing immediately;
4) take 200g3) air-dry after Rabin's Si cherry, be placed in be lined with blotting paper packaging polypropylene box (long 200mm* wide 140mm* height 45mm) in, pack with gas-control packing device, the parameter of described gas-control packing device packaging is: pumpdown time 2s, and fill gaseous mixture time 2s, vacuumizing with the time interval of filling gaseous mixture is 0s, heat-sealing time 2s, heat-sealing temperature 165 DEG C, wherein, best mist volume ratio is determined as follows:
First best initial CO is determined
2concentration, is divided into 7 groups by Rabin's Si cherry, often organizes packaging 15 box, wherein fills air as a control group in 1 group of controlled atmospheric packing Rabin Si cherry box, all fixes initial O in MAP for all the other 6 groups
2concentration is that 5%, 6 groups of Rabin's Si cherries set initial CO respectively
2concentration is 0%, 10%, 15%, 20%, 25% and 30%, remainder is nitrogen, Rabin's Si cherry controlled atmospheric packing is placed in the freezer of-1 DEG C-1 DEG C to be preserved, and every 30 days, often group was got 3 box sample determination Rabin Si cherry rotting rates and characterized the index of cherry quality, determines best initial CO
2concentration.
Determine best initial CO
2after concentration, determine best initial CO further
2the suitableeest O under concentration
2concentration, is divided into 5 groups by Rabin's Si cherry, often organizes packaging 15 box.Wherein fill air as a control group in 1 group of controlled atmospheric packing Rabin Si cherry, fix CO in MAP for all the other 4 groups
2concentration is best initial CO
2concentration, O
2concentration is set as 1%, 3%, 5%, 7% respectively, and remainder is nitrogen, and Rabin's Si cherry controlled atmospheric packing is placed in the freezer of-1 DEG C-1 DEG C to be preserved, and every 30 days, often group was got 3 box sample determination Rabin Si cherry rotting rates and characterized the index of Rabin's Si cherry quality.
Detect the indices of Rabin's Si cherry by the following method, detected every 30 days, wherein:
Rotting rate calculates as follows,
Aberration color difference analysis instrument measures.Select Rabin's Si cherry of uniform color to put into sample determination window, measure its L
*value, a
*and b
*, and calculate colorfulness (saturation degree) C
*, C
*value computing formula is as follows, often organizes mensuration 10 Rabin's Si cherries, calculating mean value.
Hardness instrumental test.Location parameter is as follows: pop one's head in as TA39, and climbing speed of popping one's head in after probe fall off rate, test rate and test before test is 0.5mm/s, and the distance of probe compression sample is 6mm, induction force 3g.Often organize mensuration 10 Rabin's Si cherries, calculating mean value.
Soluble solid content measure: get 10.0g Rabin Si cherry sample (edible part) put into mortar grind after, through centrifugal (4000r/min) or filter after taking juice mensuration.Adjust environment temperature to be 20 DEG C, adjust juice to 20 DEG C with ice simultaneously, keep the temperature reading on abbe's refractometer to be 20 DEG C.Represent soluble solid content in fruits and vegetables with mass fraction, from abbe's refractometer, directly read the mass fraction (%) of soluble solid.
Titratable acid assay.Draw Rabin's Si cherry juice 10.0mL, be placed in 100mL volumetric flask, be settled to scale, shake up.Filter after leaving standstill 30min.Draw 20.0mL filtrate, proceed in beaker, beaker is placed on magnetic stirring apparatus, put into stirring rod, insert glass electrode and the calomel electrode of acidometer, 0.5 ~ 1cm in sample liquid is inserted at buret tip, under constantly stirring, be titrated to pH6 rapidly with sodium hydroxide solution, then slow down rate of titration.When pH close to 7.5 time, add 0.1-0.2mL at every turn, and in adding rear record pH reading and the cumulative volume of sodium hydroxide solution at every turn, continue titration at least pH8.3, in the scope of pH8.1 ± 0.2, the NaOH volume consumed when pH value is less than 8.1 is designated as V
1, titration pH value is designated as pH
1, the NaOH volume consumed when pH is greater than 8.1 is designated as V
2, titration pH value is designated as pH
2, the sodium hydroxide solution volume Vx being titrated to pH8.1 and consuming is obtained by interpolation method.
Try to achieve V
xbe the fixed sodium hydroxide solution volume consumed to pH8.1.The computing formula of titratable acid content:
V in formula---sample extracting solution cumulative volume, mL;
V
s---filtrate volume of getting during titration, mL;
C---NaOH titrating solution concentration, mol/L;
V
1---the NaoH liquor capacity that titration filtrate consumes, mL;
V
0---the NaoH liquor capacity that titration distilled water consumes, mL;
M---sample quality, g;
F---conversion factor, g/mmol; In sweet cherry, titratable acid is in malic acid, f=0.067.
Vitamin B1 content: adopt high performance liquid chromatography to detect.Chromatographic column: VenusilAA (4.6 × 250mm, 5 μm); Mobile phase: A: containing the aqueous solution of 0.1%TFA (trifluoroacetic acid), B:ACN (acetonitrile); Applied sample amount: 10 μ L; Flow velocity: 0.8mL/min; Determined wavelength: 254nm.Adopt linear gradient elution, 0-10min (A:95%, B:5%); 10-15min (A:10%, B:90%); 15-20min (A:10%, B:90%); 21min (stopping).
Embodiment 1 result shows, Rabin's Si cherry controlled atmospheric packing after precooling is preserved, and the suitableeest initial gas volume ratio is 5%O
2, 10%CO
2time have best fresh-keeping effect, under this initial gas ratio, fresh-keeping Rabin's Si cherry is compared with other gas group (comprising air group), rotting rate minimum (Figure 1A and Figure 1B), aberration and firmness change less (Fig. 2 A, Fig. 2 B, Fig. 3 A, Fig. 3 B, Fig. 4 A and Fig. 4 B), soluble solid and titratable acid content underspeed and slow down (Fig. 5 A, Fig. 5 B, Fig. 6 A and Fig. 6 B), and vitamin B1 content is without obviously declining (Fig. 7 A and Fig. 7 B).
Embodiment 2
A kind of thunder Buddhist nun cherry inner wrapping air regulating fresh-keeping method, comprising:
1) in fine day early morning, pluck 1kg to have no mechanical damage, without thunder Buddhist nun cherry that is rotten, uniform color, after preserving 5 days at 25 DEG C, measure the rotting rate of thunder Buddhist nun cherry before and after preserving, chromatic aberration and hardness number, detection method is with embodiment 1, after measured, the change of thunder Buddhist nun cherry rotting rate, chromatic aberration and hardness number is all less than 10%, can be used as the present invention's material of resistance to storage.
2) in fine day early morning, pluck thunder Buddhist nun cherry, retain the carpopodium of thunder Buddhist nun cherry, select the sweet cherry of uniform color, reject the thunder Buddhist nun cherry having mechanical damage and rot;
3) by 2) the thunder Buddhist nun cherry plucked puts into precooling apparatus for drying, cleans and be pre-chilled to 2-7 DEG C with cold water, air-dry to do not have water stain after carry out next step packaging of weighing immediately;
4) take 200g3) air-dry after thunder Buddhist nun cherry, be placed in be lined with blotting paper packaging polypropylene box (long 200mm* wide 140mm* height 45mm) in, pack with gas-control packing device, the parameter of described gas-control packing device packaging: pumpdown time 2s, fill gaseous mixture time 2s, vacuumizing with the time interval of filling gaseous mixture is 0s, heat-sealing time 2s, heat-sealing temperature 165 DEG C, wherein, best mist volume ratio is determined as follows:
First the CO be suitable for is determined
2concentration, is divided into 7 groups by thunder Buddhist nun cherry, often organizes packaging 15 box.Wherein fill air as a control group in 1 group of controlled atmospheric packing thunder Buddhist nun cherry, all fix initial O in MAP for all the other 6 groups
2concentration is that 5%, 6 groups of thunder Buddhist nun cherries set initial CO respectively
2concentration is 0%, 10%, 15%, 20%, 25% and 30%, all the other are nitrogen, thunder Buddhist nun cherry controlled atmospheric packing is placed in the freezer of-1 DEG C-1 DEG C to be preserved, and every 30 days, often group was got 3 box sample determination thunder Buddhist nun's cherry rotting rates and characterized the index of thunder Buddhist nun cherry quality, determines best initial CO
2concentration.
Determine best initial CO
2after concentration, determine best initial CO further
2the suitableeest O under concentration
2concentration, is divided into 5 groups by thunder Buddhist nun cherry, often organizes packaging 15 box.Wherein fill air as a control group in 1 group of controlled atmospheric packing thunder Buddhist nun cherry.Fix CO in MAP for all the other 4 groups
2concentration is best initial CO
2concentration, O
2concentration is set as 1%, 3%, 5%, 7% respectively, and all the other are nitrogen, and thunder Buddhist nun cherry controlled atmospheric packing is placed in the freezer of-1 DEG C-1 DEG C to be preserved, and every 30 days, often group was got 3 box sample determination thunder Buddhist nun's cherry rotting rates and characterized the index of thunder Buddhist nun cherry quality.
Measure the indices such as the rotting rate of thunder Buddhist nun cherry, aberration, hardness, soluble solid content, titratable acid content and vitamin B1 content according to the method in embodiment 1, detected once every 30 days.
Experiment shows, thunder Buddhist nun cherry controlled atmospheric packing after precooling is preserved, and the suitableeest initial gas volume ratio is 7%O
2, 20%CO
2time have best fresh-keeping effect, under this initial gas volume ratio, fresh-keeping thunder Buddhist nun cherry is compared with other gas group (comprising air group), rotting rate is minimum, aberration and firmness change less, soluble solid and titratable acid content underspeed and slow down, vitamin B1 content, without obvious decline, has similar experiment effect to embodiment 1, repeats no more herein.
Except above two embodiments, the present invention also comprises following examples, and application inner wrapping controlled atmosphere pioneer cherry, friendship cherry and beautiful early cherry, select initial gas volumetric concentration to be respectively 5%O
2, 10%CO
2, 85%N
2; 3%O
2, 10%CO
2, 87%N
2; 7%O
2, 15%CO
2, 82%N
2.Under above-mentioned initial gas volumetric concentration, sweet cherry controlled atmospheric packing is also placed in freezer preservation, compared with other gas group (comprising air group), three kinds of sweet cherries have best fresh-keeping effect, rotting rate is minimum, aberration and firmness change less, soluble solid and titratable acid content underspeed and slow down, and vitamin B1 content is without obvious decline.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. a sweet cherry inner wrapping air regulating fresh-keeping method, is characterized in that, comprising:
1) fresh-keeping kind is determined: in fine day early morning, pluck and have no mechanical damage, without middle-late ripening variety sweet cherry that is rotten, uniform color, preserve after 5 days for 25 DEG C, measure the rotting rate of sweet cherry before and after preserving, aberration and these three indexs of hardness, choose above-mentioned three indexs change and be all less than the sweet cherry variety of 10% as inner wrapping controlled atmosphere kind;
2) inner wrapping controlled atmosphere process:
2.1) in fine day early morning, 1 is plucked) sweet cherry variety determined, retain the carpopodium of sweet cherry, select the sweet cherry of uniform color, reject the sweet cherry having mechanical damage and rot;
2.2) by 2.1) sweet cherry plucked puts into precooling apparatus for drying, cleans and be pre-chilled to 2-7 DEG C with cold water, air-dry to do not have water stain after carry out next step immediately;
2.3) get 200g2.2) air-dry after sweet cherry, be placed in and be lined with in the packaging polypropylene box of blotting paper, pack with gas-control packing device, after packaging, the percent by volume of mist is in packaging polypropylene box: O
23%-7%, CO
210%-20%, all the other are nitrogen;
2.4) by 2.3) sweet cherry that controlled atmospheric packing the is good freezer that is placed in-1 DEG C ~ 1 DEG C stores.
2. sweet cherry inner wrapping air regulating fresh-keeping method according to claim 1, is characterized in that, 2.3) in, the specification of described packaging polypropylene box is long 200mm* wide 140mm* height 45mm.
3. sweet cherry inner wrapping air regulating fresh-keeping method according to claim 1, it is characterized in that, 2.3) in, the parameter of described gas-control packing device packaging is: pumpdown time 2s, fill gaseous mixture time 2s, vacuumizing with the time interval of filling gaseous mixture is 0s, heat-sealing time 2s, heat-sealing temperature 165 DEG C.
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| CN106035612A (en) * | 2016-06-22 | 2016-10-26 | 蚌埠市老顽童食品厂 | Sweet cherry preservation method applicable to transportation |
| CN106035618A (en) * | 2016-06-12 | 2016-10-26 | 合肥润枝生态农业有限公司 | Economical and practical air-control preservation method used in sweet cherry production places |
| CN106070566A (en) * | 2016-06-22 | 2016-11-09 | 蚌埠市老顽童食品厂 | A kind of air regulating fresh-keeping method of Prunus avium |
| CN106135390A (en) * | 2016-06-29 | 2016-11-23 | 中国农业机械化科学研究院 | A kind of cherry fresh-keeping method of modified atmosphere packing |
| CN107296094A (en) * | 2017-08-03 | 2017-10-27 | 北京福瑞通科技有限公司 | A kind of dynamic air conditioning system and its controlled atmosphere storage method based on ethanol analysis instrument |
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| CN107296094A (en) * | 2017-08-03 | 2017-10-27 | 北京福瑞通科技有限公司 | A kind of dynamic air conditioning system and its controlled atmosphere storage method based on ethanol analysis instrument |
| CN107960452A (en) * | 2017-11-22 | 2018-04-27 | 中华全国供销合作总社济南果品研究院 | A kind of sweet cherry storage fresh-keeping method |
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