CN101253884A - Composite antistaling agent for storing wild rice stem and method of preparing the same - Google Patents
Composite antistaling agent for storing wild rice stem and method of preparing the same Download PDFInfo
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- CN101253884A CN101253884A CNA2008100603164A CN200810060316A CN101253884A CN 101253884 A CN101253884 A CN 101253884A CN A2008100603164 A CNA2008100603164 A CN A2008100603164A CN 200810060316 A CN200810060316 A CN 200810060316A CN 101253884 A CN101253884 A CN 101253884A
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- wild rice
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Abstract
A compound antistaling agent for preserving the zizania aquatica is provided with the formula components by mass percent as follows: nanon calcium carbonate 0.05%-0.15 %, sodium stearate 0.01%-0.03%, sodium carboxymethylcellulose 1%-2%, sodium D-isoascorbate 0.5%-1.5% and water for the rest. The method for preparing the compound antistaling agent measuring in every 10 liters includes the steps: adding 5-15g nanon calcium carbonate to the water at the temperature of 70-90 DEG C, stirring evenly and insulating, adding 1-3g sodium stearate, producing one liter, insulating for 30-60 min in water bath and modifying; heating and dissolving 100-200g sodium carboxymethylcellulose in the water, cooling, adding 50-150g sodium D-isoascorbate, producing 9 liters; evenly mixing the two solutions and obtaining the compound antistaling agent for preserving the zizania aquatica. The method includes soaking the shelled zizania aquatica in the compound antistaling agent for 3-5 min, dragging out of the antistaling agent, drying and preserving. The method can effectively prevent the zizania aquatica from browning and losing water, maintain the eating quality and the commodity value and extend the storage period.
Description
Technical field
The invention belongs to the applied chemistry technical field, relate to a kind of preservation technique of agricultural product, be specifically related to a kind of composite preservative of wild rice stem and preparation method thereof that shells that is used to preserve.
Background technology
Wild rice stem is the aquatic vegetable of China's special product, and its quality is tender and crisp, and delicious flavour is nutritious and be loved by the people.Particularly its rich dietary fiber has significant preventive effect to modern civilization is sick as obesity, high fat of blood etc.At present wild rice stem is mainly sold with the form of band shell, because the hay shell accounts for the weight of wild rice stem about 30%, and cleans and shells rather loaded down with trivial detailsly, influences urban health.The wild rice stem that shells is compared with band shell wild rice stem, has characteristics such as instant, cleaning and edible rate height and enjoys consumer's favor.We call slight processing fruits and vegetables to this through the fresh fruit of vegetables that cleans, removes the peel simple processing such as (stoning), cutting, finishing, classification, packing.Along with the quickening of people's rhythm of life, slightly process fruits and vegetables because of reducing the favor of consumer's housework, edible convenient, clean, advantage more and more is subjected to numerous families such as high-quality is fresh.Yet, in the processing that wild rice stem shells, because the mechanical damage that cutting causes will be induced the ANOMALOUS VARIATIONS of a series of Physiology and biochemistries, the increase of for example surperficial brown stain, dehydration shrinkage, the generation of hindering ethene, respiratory rate etc., thus cause its quality to descend rapidly; And increased the infection by microorganisms chance, and compare easier corruption with band shell wild rice stem, shorten shelf life greatly and reduced commodity value.
At present commercial adopt aggregation wrapper films such as polyethylene, polyvinyl chloride etc. as slight processing fruits and vegetables packaging material, yet these polymeric materials are difficult for decomposing in natural environment, retain for a long time and can bring severe contamination, characteristics such as the part material is toxic, easily environment is produced " white pollution ", so people expect novel biodegradable nontoxic food fresh keeping packaging material.Sodium carboxymethylcellulose is a kind of natural polysaccharide edible film coating antistaling agent, has the source and enriches, and is biodegradable, nonpoisonous and tasteless, do not have the residual toxicity problem, thereby becomes the focus of the research and development of packaging for foodstuff in recent years.The film that sodium carboxymethylcellulose forms in fruit surface coating back, for fruit is created little controlled atmosphere environment, play the effect that is similar to the single fruit controlled atmospheric packing, owing to have certain resistance oxygen and block water vapour and good tensile strength, can reduce the respiratory intensity and the transpiration of fruits and vegetables effectively, make respiratory intensity be in optimum range, effectively slowed down the gas exchange of fruit, and minimizing dehydration, reduce the consumption of nutriment, reduce the rotten loss that causes because of infecting of pathogen, regulate the physiological metabolism after fruit is adopted, thereby the freshness that keeps fruits and vegetables, the shelf-life that prolongs fruits and vegetables.But because of the mechanical strength of sodium carboxymethylcellulose institute film forming is low, and very responsive to water, so must improve to its performance.The interpolation nano material improves its fresh-keeping effect in conventional edible film-coating materials such as sodium carboxymethylcellulose becomes current research focus.Present Nano Silver, nano-TiO
2, nanometer SiOx etc. is applied to preserving fruit and vegetable utilizing that report is all arranged, but also is in the starting stage for the fresh-keeping research of nano-calcium carbonate.Calcium carbonate is a kind of broad-spectrum inorganic filler, advantages such as it is wide to have the source, and cost is low, and toxicity is little, expand the scope of application of calcium carbonate greatly, be widely used in each side such as rubber industry, plastics industry, paper industry, coatings industry, daily use chemicals and medical industry.And nano-calcium carbonate helps the research of film to yet there are no report as sodium carboxymethylcellulose.
Summary of the invention
The purpose of this invention is to provide and a kind ofly suppress wild rice stem fruit browning and dehydration and prolong composite preservative of wild rice stem storage time and preparation method thereof.
The prescription that the present invention is used for the composite preservative of storing wild rice stem consists of: mass percent is nano-calcium carbonate, the odium stearate of 0.01%-0.03%, the sodium carboxymethylcellulose of 1%-2%, the different Vc sodium of 0.5-1.5%D-of 0.05%-0.15%, and surplus is a water.
A kind of mass percent that preferably is used for the composite preservative of storing wild rice stem is: 0.1% nano-calcium carbonate, 0.02% odium stearate, 1.5% the different Vc sodium of sodium carboxymethylcellulose, 1%D-, surplus is a water.
The preparation method that the present invention is used for the composite preservative of storing wild rice stem is: in per 10 liters of composite preservatives: get the 5-15g nano-calcium carbonate, add 70-90 ℃ of water, stir and be incubated, add the 1-3g odium stearate then, be settled to 1 liter, 1. water bath heat preservation 30-60min modification obtains solution; Get the 100-200g sodium carboxymethylcellulose, heating for dissolving is in water, and the cooling back adds the different Vc sodium of 50-150g D-, is settled to 9 liters, obtains solution 2.; 2. 1. solution evenly mixed the composite preservative that obtains storing wild rice stem with solution.
The specific embodiment
Embodiment 1
1. get the 5g nano-calcium carbonate, add about about 1L 70 ℃ of water and stir and be incubated, add the 1g odium stearate then, be settled to 1 liter, water bath heat preservation 30min modification.2. get the 100g sodium carboxymethylcellulose, heating for dissolving is in water, and cooling back adds the different Vc sodium of 50g D-, is settled to 9 liters, and the 1 liter of solution that obtains in 1. with above-mentioned steps evenly mixes then, obtains being used for 10 liters of the composite preservatives of storing wild rice stem.
The composite preservative that is used for storing wild rice stem for preparing institute's expense in above preparation ratio and program.
Select big or small basically identical, the wild rice stem of not damaged and disease and pest is peelled off shell, soaks 3～5 minutes in above-mentioned composite fresh-keeping liquid, pulls out to dry up, and in the plastic box of then wild rice stem being packed into, places under 8～10 ℃ the temperature and preserves 6～10 days.
Embodiment 2
1. get the 10g nano-calcium carbonate, add about about 1L 80 ℃ of water and stir and be incubated, add the 2g odium stearate then, be settled to 1 liter, water bath heat preservation 45min modification.2. get the 150g sodium carboxymethylcellulose, heating for dissolving is in water, and the cooling back adds the different Vc sodium of 100g D-, is settled to 9 liters, mixes with above-mentioned 1. middle 1 liter of solution of gained then.Obtain being used for 10 liters of the composite preservatives of storing wild rice stem.
The composite preservative that is used for storing wild rice stem for preparing institute's expense in above preparation ratio and program.
Select big or small basically identical, the wild rice stem of not damaged and disease and pest is peelled off shell, soaks 3～5 minutes in above-mentioned composite fresh-keeping liquid, pulls out to dry up, and in the plastic box of then wild rice stem being packed into, places under 8～10 ℃ the temperature and preserves 6～10 days.
Embodiment 3
1. get the 15g nano-calcium carbonate, add about about 1L 90 ℃ of water and stir and be incubated, add the 3g odium stearate then, be settled to 1 liter, water bath heat preservation 60min modification.2. get the 200g sodium carboxymethylcellulose, heating for dissolving is in water, and the cooling back adds the different Vc sodium of 150g D-, is settled to 9 liters, mixes with above-mentioned 1. middle 1 liter of solution of gained then.Obtain being used for 10 liters of the composite preservatives of storing wild rice stem.
The composite preservative that is used for storing wild rice stem for preparing institute's expense in above preparation ratio and program.
Select big or small basically identical, the wild rice stem of not damaged and disease and pest is peelled off shell, soaks in above-mentioned composite fresh-keeping liquid 3-5 minute, pulls out to dry up, and in the plastic box of then wild rice stem being packed into, places under 8-10 ℃ the temperature storage 6-10 days.
The variation (%) of table 1 wild rice stem weight-loss ratio
| Handle | 2 days | 4 days | 6 days | 8 days | 10 days |
| The A group | 3.1 | 5.8 | 7.6 | 9.7 | 11.3 |
| The B group | 1.8 | 2.7 | 3.8 | 4.9 | 6.7 |
| The C group | 1.9 | 2.6 | 3.5 | 4.7 | 6.3 |
| The D group | 1.6 | 2.2 | 3.1 | 4.3 | 5.8 |
| The E group | 1.5 | 2.4 | 3.4 | 4.4 | 6.0 |
The variation of table 2 wild rice stem browning index
| Handle | 2 days | 4 days | 6 days | 8 days | 10 days |
| The A group | 0.4 | 1.2 | 2.3 | 2.9 | 3.3 |
| The B group | 0.2 | 0.7 | 1.3 | 2.1 | 2.4 |
| The C group | 0.2 | 0.6 | 1.2 | 1.5 | 1.9 |
| The D group | 0.2 | 0.4 | 0.7 | 1.1 | 1.5 |
| The E group | 0.3 | 0.5 | 0.9 | 1.4 | 2.1 |
Wherein:
The A group is the fresh-keeping effect of clear water contrast;
The B group is for adding the fresh-keeping effect that sodium carboxymethylcellulose is filmed in the clear water;
The C group is the fresh-keeping effect of embodiment 1;
The D group is the fresh-keeping effect of embodiment 2;
The E group is the fresh-keeping effect of embodiment 3.
The assessment of browning index according to wild rice stem surface brown stain area size, is divided into 5 grades with browning degree.0 grade of no brown stain, 35%～50%, 4 grades of brown stain area＞50% of 20%～35%, 3 grades of brown degree areas of 1 grade of brown stain area＜20,2 grade brown stain area.Computing formula: browning index=∑ (brown stain rank * this number of levels)/(check total).Browning index is greater than 2, and we think and have lost commodity value basically.
As can be seen from the above table, composite preservative of the present invention is handled the brown stain and the dehydration that can effectively suppress the wild rice stem surface, the group that its effect obviously is better than control group and only adds sodium carboxymethylcellulose, under 8～10 ℃, can preserve 8～10 days, and contrast can only be preserved 4～6 days, and composite preservative is handled comparison and prolonged 4～5 days according to storage time.Therefore, composite preservative of the present invention can effectively be kept the quality of wild rice stem, prolongs the shelf-life of wild rice stem.
Claims (3)
1, a kind of composite preservative that is used for storing wild rice stem, it is characterized in that: the prescription that is used for the composite preservative of storing wild rice stem consists of: mass percent is 0.05～0.15% nano-calcium carbonate, 0.01～0.03% odium stearate, 1～2% the different Vc sodium of sodium carboxymethylcellulose, 0.5～1.5%D-, and surplus is a water.
2, a kind of according to claim 1 preparation method who is used for the composite preservative of storing wild rice stem, it is characterized in that: in per 10 liters of composite preservatives: get 5～15g nano-calcium carbonate, add 70～90 ℃ of water, stir and be incubated, add 1～3g odium stearate then, be settled to 1 liter, 1. water bath heat preservation 30～60min modification obtains solution; Get 100～200g sodium carboxymethylcellulose, heating for dissolving is in water, and the cooling back adds the different Vc sodium of 50～150g D-, is settled to 9 liters, obtains solution 2.; 2. 1. solution evenly mixed the composite preservative that obtains being used for storing wild rice stem with solution.
3, a kind of according to claim 1 composite preservative that is used for storing wild rice stem, it is characterized in that: the mass percent as the composite preservative that preferably is used for storing wild rice stem is: 0.1% nano-calcium carbonate, 0.02% odium stearate, 1.5% the different Vc sodium of sodium carboxymethylcellulose, 1%D-, surplus is a water.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100603164A CN101253884B (en) | 2008-04-03 | 2008-04-03 | Composite antistaling agent for storing wild rice stem and method of preparing the same |
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| CN2008100603164A CN101253884B (en) | 2008-04-03 | 2008-04-03 | Composite antistaling agent for storing wild rice stem and method of preparing the same |
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| CN101253884A true CN101253884A (en) | 2008-09-03 |
| CN101253884B CN101253884B (en) | 2011-09-28 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101461419B (en) * | 2009-01-15 | 2011-04-06 | 浙江大学 | Biological preservative for preventing and treating diseases of garden stuff and preparation method thereof |
| CN102578222A (en) * | 2012-03-19 | 2012-07-18 | 浙江大学 | Nanometer composite preservative used for peeled sugarcanes and preparation method of same |
| CN104642516A (en) * | 2014-06-24 | 2015-05-27 | 何松 | Method for preserving cane shoots |
| CN107447576A (en) * | 2017-07-11 | 2017-12-08 | 合肥龙发包装有限公司 | A kind of preparation method of the significant corrugated case of fresh-keeping effect |
| WO2022025829A1 (en) * | 2020-07-29 | 2022-02-03 | Eden Agritech Co., Ltd. | A method for synthesizing carboxymethylcellulose-based composite film for prolonging shelf life |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IL144058A (en) * | 2001-06-28 | 2006-10-05 | Yaakov Lahav | Composition for coating fruits, vegetables and fowl eggs, especially useful for organic produce |
| CN1505992A (en) * | 2002-12-13 | 2004-06-23 | 国家农产品保鲜工程技术研究中心(天津 | Cyclopropene preservative with double functions of anticorrosion and keeping freshness |
| CN1726789A (en) * | 2005-07-21 | 2006-02-01 | 浙江大学 | Composite antistaling agent for restraining lignification of bamboo shoot, and method of use |
| CN100539852C (en) * | 2007-07-27 | 2009-09-16 | 湖北省农业科学院农产品加工与核农技术研究所 | A kind of aquatic vegetable anti-staling agent |
-
2008
- 2008-04-03 CN CN2008100603164A patent/CN101253884B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101461419B (en) * | 2009-01-15 | 2011-04-06 | 浙江大学 | Biological preservative for preventing and treating diseases of garden stuff and preparation method thereof |
| CN102578222A (en) * | 2012-03-19 | 2012-07-18 | 浙江大学 | Nanometer composite preservative used for peeled sugarcanes and preparation method of same |
| CN102578222B (en) * | 2012-03-19 | 2013-04-24 | 浙江大学 | Nanometer composite preservative used for peeled sugarcanes and preparation method of same |
| CN104642516A (en) * | 2014-06-24 | 2015-05-27 | 何松 | Method for preserving cane shoots |
| CN107447576A (en) * | 2017-07-11 | 2017-12-08 | 合肥龙发包装有限公司 | A kind of preparation method of the significant corrugated case of fresh-keeping effect |
| WO2022025829A1 (en) * | 2020-07-29 | 2022-02-03 | Eden Agritech Co., Ltd. | A method for synthesizing carboxymethylcellulose-based composite film for prolonging shelf life |
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| CN101253884B (en) | 2011-09-28 |
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