CN109845814A - A method of control brown stain of cut lotus root - Google Patents
A method of control brown stain of cut lotus root Download PDFInfo
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- CN109845814A CN109845814A CN201910030983.6A CN201910030983A CN109845814A CN 109845814 A CN109845814 A CN 109845814A CN 201910030983 A CN201910030983 A CN 201910030983A CN 109845814 A CN109845814 A CN 109845814A
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Abstract
The present invention relates to a kind of methods for controlling brown stain of cut lotus root, include the following steps: the lotus rhizome of fresh, white rotten, the non-brown stain of nothing of (1) selection, and cleaning removes impurity removing, is cut into the lotus root piece with a thickness of 0.4-0.7cm；(2) the lotus root piece cut is put into after impregnating 8-12min in the dandelion Aqueous extracts that mass concentration is 15-20%, dries, packs, refrigerates.The method provided by the present invention is simple and easy to do, it is at low cost, highly-safe, brown stain of cut lotus root degree and weight-loss ratio can be effectively reduced, extend the fresh-cut lotus root quality guarantee period.
Description
Technical field
The present invention relates to fresh-cut fruit and vegetable processing and antistaling technical fields, and in particular to a kind of side for controlling brown stain of cut lotus root
Method.
Background technique
Lotus rhizome is commonly called as lotus dish, is a kind of perennial root aquatic herbaceous plant, at home mainly produced in the Yangtze river basin
The ground such as Jiangsu, Zhejiang, Hunan, Hubei.The nutritional ingredient very abundant of lotus rhizome, mainly there is carbohydrate, fat, starch and protein,
Also containing a small amount of carrotene, vitamin C, vitamin B6, polyphenols and minerals etc..Lotus rhizome is tender and crisp and micro-
Sweet tea both can directly be eaten raw, can also be cooked, and not only have the effects that appetizing heat-clearing, nourishing are nourished one's nature, there are also promote new old generation
It thanks, skin is made to keep delicate effect, therefore lotus rhizome is as one of home cooking, it is preferred by everyone, it is that China's volume of production and marketing is larger
One of aquatic vegetable, and edible and economic value with higher.
Fresh-cut lotus root be fresh lotus rhizome is cleaned, is rebuild, is removed the peel, cutting, dehydration, the processing flows such as packaging, keep
The flavor of lotus rhizome and fresh state are for a kind of consumer is instant or catering trade uses new-type converted products.But fresh-cut lotus root
How easy brown stain during saving and processing to influence the mouthfeel of lotus rhizome, quality and sale, therefore controls fresh-cut lotus root
Brown stain becomes the major issue of fresh-cut lotus root processing.
Currently, being mostly using chemical preservative, food additives or various control in the method for control brown stain of cut lotus root
The method that mode combines.For example, a kind of method of antistaling agent and its fresh-keeping lotus rhizome disclosed in patent CN200410061259.3,
It is fresh-keeping by sodium benzoate, sodium pyrosulfate, alum, phytic acid etc.；Patent CN201410176440.2 discloses a kind of fresh lotus root point
Processing method for keeping fresh forms colour protecting liquid to fresh lotus root point color protection by citric acid, water, salt, edible sodium pyrosulfite, calcium chloride.This
A little methods are to inhibit the brown stain of lotus rhizome all to deposit although there is certain effect using chemical preservative or food additives
It is complicated in production, at high cost, the problem of edible safety cannot meet consumer demand well.And patent
CN200810139548.9 discloses a kind of method for inhibiting brown stain of cut lotus root, is by carrying out 48-55 DEG C of heat to lotus root piece
Water process 4-10min inhibits lotus root browning, although any chemical preservative or food additives, food safety is not used
Property greatly improve, but its eating mouth feel after hot water treatment is poor, and is not easy encapsulation and saves.Therefore, it is badly in need of wanting a kind of behaviour
Make the method for control brown stain of cut lotus root simple, highly-safe, that effect is good.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide it is a kind of it is simple and easy to do, at low cost, highly-safe,
Brown stain of cut lotus root degree and weight-loss ratio can be effectively reduced, extend the side of the control brown stain of cut lotus root of fresh-cut lotus root quality guarantee period
Method.
A kind of method controlling brown stain of cut lotus root provided by the invention adopts the following technical scheme that:
A method of control brown stain of cut lotus root includes the following steps:
(1) fresh, white nothing is selected to rot, the lotus rhizome of non-brown stain, cleaning is removed impurity removing, is cut into a thickness of 0.4-0.7cm
Lotus root piece；
(2) the lotus root piece cut is put into after impregnating 8-12min in the dandelion Aqueous extracts that mass concentration is 15-20%, is dried in the air
Dry, packaging, refrigeration.
The method of above-mentioned control brown stain of cut lotus root, wherein the mass concentration of the dandelion Aqueous extracts is 20%.
The method of above-mentioned control brown stain of cut lotus root, wherein the liquid level of dandelion Aqueous extracts described in step (2) is higher by
Lotus root piece 2-4cm.
The method of above-mentioned control brown stain of cut lotus root, wherein the temperature of refrigeration described in step (2) is 2-8 DEG C.
The method of above-mentioned control brown stain of cut lotus root, wherein the preparation step of the dandelion Aqueous extracts is as follows:
(1) preparation of dandelion powder: by dandelion drying, cooling, crushing, sieving, dandelion powder is obtained；
(2) preparation of dandelion extracting solution: dandelion powder is soaked in water 20-40min, the matter of the dandelion powder and water
Amount is than being 1:(14-16), microwave heating 2-5min is cooled to room temperature, then microwave heating 2-5min, is cooled to room temperature, and is centrifuged, is taken
Supernatant water bath with thermostatic control 12-18min at 75-85 DEG C, is cooled to room temperature to get dandelion extracting solution；
(3) preparation of dandelion Aqueous extracts: according to mass ratio being 1:(4-5.7 by dandelion extracting solution and water) ratio into
Row is prepared to obtain the final product.
The method of above-mentioned control brown stain of cut lotus root, wherein the temperature of drying described in step (1) is 55-65 DEG C.
The method of above-mentioned control brown stain of cut lotus root, wherein step (1) sieving was 60-80 mesh.
A kind of control brown stain of cut lotus root method provided by the invention has the beneficial effect that:
1, a kind of control brown stain of cut lotus root method provided by the invention is using dandelion Aqueous extracts as anti-enzymatic regent.
Fruits and vegetables brown stain includes enzymatic browning and two kinds of non-enzymatic browning, wherein ascorbic acid brown stain, that Maillard reaction belongs to non-enzymatic is brown
Become.Brown stain of cut lotus root is mainly enzymatic browning, needs phenolic compound, polyphenol oxidase and oxygen or oxide
3 factors.In order to reach the generation for preventing enzymatic browning, one of above-mentioned factor just must be driven off.In dandelion chemical component compared with
Complexity, that separates at present has flavonoids, polysaccharide, phenolic acid class, phytosterol, terpene, glycoprotein, oligosaccharide, tonka-bean
More than 50 compound such as element, amino acid, fatty acid, lignin, alkaloid, organic acid, minerals.Therefore dandelion extract tool
There is the effects of broad-spectrum antiseptic, anti-oxidant, clearing heat and detoxicating, is natural antistaling agent, it is nontoxic.It is some in dandelion Aqueous extracts
The antioxidation of water soluble ingredient, the oxidation for polyphenol oxides enzyme, destroys the enzyme of enzymatic browning, to inhibit fresh
Cut the brown stain of lotus rhizome.Brown stain of cut lotus root degree and weight-loss ratio can be effectively reduced in the lotus rhizome impregnated with dandelion Aqueous extracts, make fresh
Cutting lotus rhizome keeps fresh color to reach 12 days or more, and is not added with any chemical preservative or food additives, edible safety
Property it is high, be not required to be heated, can preferably retain the mouthfeel of lotus rhizome.
2, anti-enzymatic regent used in a kind of control brown stain of cut lotus root method provided by the invention is the water of dandelion
Extract is only extracted with water, and any chemical reagent (such as ethyl alcohol) is not used and extracts, does not need subsequent place
Reason, easy to operate, edible safety is high.
3, method is simple, at low cost, environmentally friendly for a kind of control brown stain of cut lotus root provided by the invention.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
Embodiment 1
A method of control brown stain of cut lotus root includes the following steps:
(1) it selects fresh, white nothing to rot, the high-quality lotus rhizome of non-brown stain, lotus rhizome surface sludge is cleaned with tap water and is done
Only, it stalk and peels, clean and dries, be cut into the lotus root piece with a thickness of 0.4-0.7cm；
(2) dandelion dried at 55-65 DEG C, be cooled to room temperature, crushed, crossing 60-80 mesh, obtaining dandelion powder；It will
Dandelion powder is soaked in water 20-40min, and the mass ratio of the dandelion powder and water is 1:(14-16), microwave moderate heat heats 2-
5min is cooled to room temperature, then microwave moderate heat heats 2-5min, is cooled to room temperature, is centrifuged 8- under the conditions of 2500-3500r/min
12min takes the water bath with thermostatic control 12-18min at 75-85 DEG C of the supernatant after being centrifuged, and is cooled to room temperature to get dandelion extraction
Liquid；According to mass ratio be 1:(4-5.7 by dandelion extracting solution and water) ratio carry out with mass concentration is made being 15-20%'s
Dandelion Aqueous extracts；
(3) the lotus root piece that step (1) is cut is put into the dandelion water that the mass concentration obtained in step (2) is 15-20%
Soaking at room temperature 8-12min in extract, and the liquid level of dandelion Aqueous extracts is higher by lotus root piece 2-4cm, dries, with vacuum packaging bag heat seal
Packaging refrigerates at 2-8 DEG C, the brown stain degree and weight-loss ratio of test fresh-cut lotus root after a certain period of time.
Wherein, the purchase of lotus rhizome used in the present invention from Xuchang Pang Donglai supermarket, buy from the big pharmacy of Zhang Zhongjing by dandelion,
Micro-wave oven used in microwave is the EM7KCGW3-NR micro-wave oven of Guangdong Midea Kitchen Appliance Manufacturing Co., Ltd. in step (2)；Step
Suddenly brown stain degree is measured with NR200 color difference meter in (3), indicates that (L value is 0-100 to lotus root browning degree, and 0-100 distinguishes table with L value
Show black and white two extremely)；Weight-loss ratio is measured using weight method, and calculation formula is as follows: weight-loss ratio (%)=(m1-m2)×
100/m1, m1For the quality/g, m before fresh-cut lotus root storage2Quality/g after a certain period of time is stored for fresh-cut lotus root.
Use it is provided in this embodiment control brown stain of cut lotus root method storage fresh-cut lotus root can store 12d with
On, sensory properties is good, and brown stain degree and weight-loss ratio are low.
Embodiment 2
A method of control brown stain of cut lotus root includes the following steps:
(1) it selects fresh, white nothing to rot, the high-quality lotus rhizome of non-brown stain, lotus rhizome surface sludge is cleaned with tap water and is done
Only, it stalk and peels, clean and dries, be cut into the lotus root piece with a thickness of 0.4-0.7cm；
(2) dandelion dried at 60 DEG C, be cooled to room temperature, crushed, crossing 70 meshes, obtaining dandelion powder；By dandelion
Powder is soaked in water 30min, and the mass ratio of the dandelion powder and water is 1:15, and microwave moderate heat heats 3min, is cooled to room temperature, then
Microwave moderate heat heats 3min, is cooled to room temperature, is centrifuged 10min under the conditions of 3000r/min, and the supernatant after taking centrifugation is in 80 DEG C
Lower water bath with thermostatic control 15min, is cooled to room temperature to get dandelion extracting solution；According to mass ratio it is 1 by dandelion extracting solution and water:
5.7 ratio is carried out with the dandelion Aqueous extracts that mass concentration is made as 15%；
(3) the lotus root piece that step (1) is cut is put into the dandelion Aqueous extracts that the mass concentration obtained in step (2) is 15%
Middle soaking at room temperature 10min, and the liquid level of dandelion Aqueous extracts is higher by lotus root piece 3cm, dries, packed with vacuum packaging bag heat seal,
It is refrigerated in 2-8 DEG C of refrigerator, and to distill water process as a control test, that is to say will cut the room temperature leaching into the water of rear lotus root piece
10min is steeped, and the liquid level of water is higher by lotus root piece 3cm, dries, is packed with vacuum packaging bag heat seal, is refrigerated in 2-8 DEG C of refrigerator,
Test fresh-cut lotus root refrigerates brown stain degree and weight-loss ratio after 0d, 4d, 8d, 12d, 16d under the conditions of different disposal respectively.It is specific to survey
Test result such as table 1.
Influence of the 1 15% dandelion Aqueous extracts of table to brown stain of cut lotus root degree L and weight-loss ratio
The fresh-cut lotus root stored using the method for control brown stain of cut lotus root provided in this embodiment surface when storing 12d
It does not change, sensory properties is good, and when storage is to 16d, a little stain occurs in lotus rhizome surface, and sensory modalities are by a little shadow
It rings, and has there is fraction of stain in the surface when storing 8d of the lotus rhizome in blank control group, sensory modalities are influenced a little, when
When storage is to 12d, surface stain is serious, and sensory modalities are poor.From table 1 it follows that compared with the blank control of water process, Pu
Brown stain of cut lotus root degree and weight-loss ratio reduce after public English aqueous extract impregnates, therefore method provided in this embodiment can store lotus
Lotus root 12d or more, sensory properties is good, and brown stain degree and weight-loss ratio are low.
Embodiment 3
A method of control brown stain of cut lotus root includes the following steps:
(1) it selects fresh, white nothing to rot, the high-quality lotus rhizome of non-brown stain, lotus rhizome surface sludge is cleaned with tap water and is done
Only, it stalk and peels, clean and dries, be cut into the lotus root piece with a thickness of 0.4-0.7cm；
(2) dandelion dried at 58 DEG C, be cooled to room temperature, crushed, crossing 60 meshes, obtaining dandelion powder；By dandelion
Powder is soaked in water 25min, and the mass ratio of the dandelion powder and water is 1:14, and microwave moderate heat heats 4min, is cooled to room temperature, then
Microwave moderate heat heats 4min, is cooled to room temperature, is centrifuged 12min under the conditions of 2500r/min, and the supernatant after taking centrifugation is in 85 DEG C
Lower water bath with thermostatic control 12min, is cooled to room temperature to get dandelion extracting solution；It according to mass ratio is 1:4 by dandelion extracting solution and water
Ratio carry out be made mass concentration be 20% dandelion Aqueous extracts；
(3) the lotus root piece that step (1) is cut is put into the dandelion Aqueous extracts that the mass concentration obtained in step (2) is 20%
Middle soaking at room temperature 8min, and the liquid level of dandelion Aqueous extracts is higher by lotus root piece 3cm, dries, is packed, with vacuum packaging bag heat seal in 2-
It is refrigerated in 8 DEG C of refrigerator, and to distill water process as a control test, that is to say will cut rear lotus root piece soaking at room temperature into the water
8min, and the liquid level of water is higher by lotus root piece 3cm, dries, is packed with vacuum packaging bag heat seal, is refrigerated in 2-8 DEG C of refrigerator, respectively
Test fresh-cut lotus root refrigerates brown stain degree and weight-loss ratio after 0d, 4d, 8d, 12d, 16d under the conditions of different disposal.Specific test knot
Fruit such as table 2.
Influence of the 2 20% dandelion Aqueous extracts of table to brown stain of cut lotus root degree L and weight-loss ratio
The fresh-cut lotus root of the method storage of control brown stain of cut lotus root provided in this embodiment is not sent out on surface when storing 12d
Changing, sensory properties is good, and when storage is to 16d, a little stain occurs in lotus rhizome surface, and sensory modalities are influenced a little,
And has there is fraction of stain in the surface when storing 8d of the lotus rhizome in blank control group, sensory modalities are influenced a little, work as storage
When hiding is to 12d, surface stain is serious, and sensory modalities are poor.From Table 2, it can be seen that compared with the blank control of water process, Pu Gong
Brown stain of cut lotus root degree and weight-loss ratio reduce after English aqueous extract impregnates, therefore method provided in this embodiment can store lotus rhizome
12d or more, sensory properties is good, and brown stain degree and weight-loss ratio are low.
Embodiment 4
A method of control brown stain of cut lotus root includes the following steps:
(1) it selects fresh, white nothing to rot, the high-quality lotus rhizome of non-brown stain, lotus rhizome surface sludge is cleaned with tap water and is done
Only, it stalk and peels, clean and dries, be cut into the lotus root piece with a thickness of 0.4-0.7cm；
(2) dandelion dried at 62 DEG C, be cooled to room temperature, crushed, crossing 80 meshes, obtaining dandelion powder；By dandelion
Powder is soaked in water 38min, and the mass ratio of the dandelion powder and water is 1:16, and microwave moderate heat heats 2min, is cooled to room temperature, then
Microwave moderate heat heats 2min, is cooled to room temperature, is centrifuged 8min under the conditions of 3500r/min, and the supernatant after taking centrifugation is in 75 DEG C
Lower water bath with thermostatic control 18min, is cooled to room temperature to get dandelion extracting solution；According to mass ratio it is 1 by dandelion extracting solution and water:
4.6 ratio is carried out with the dandelion Aqueous extracts that mass concentration is made as 18%.
(3) the lotus root piece that step (1) is cut is put into the dandelion Aqueous extracts that the mass concentration obtained in step (2) is 18%
Middle soaking at room temperature 11min, and the liquid level of dandelion Aqueous extracts is higher by lotus root piece 3cm, dries, packed with vacuum packaging bag heat seal,
It is refrigerated in 2-8 DEG C of refrigerator, and to distill water process as a control test, that is to say will cut the room temperature leaching into the water of rear lotus root piece
11min is steeped, and the liquid level of water is higher by lotus root piece 3cm, dries, is packed with vacuum packaging bag heat seal, is refrigerated in 2-8 DEG C of refrigerator,
Test fresh-cut lotus root refrigerates brown stain degree and weight-loss ratio after 0d, 4d, 8d, 12d, 16d under the conditions of different disposal respectively.It is specific to survey
Test result such as table 3.
Influence of the 3 18% dandelion Aqueous extracts of table to brown stain of cut lotus root degree L and weight-loss ratio
The fresh-cut lotus root stored using the method for control brown stain of cut lotus root provided in this embodiment surface when storing 12d
It does not change, sensory properties is good, and when storage is to 16d, a little stain occurs in lotus rhizome surface, and sensory modalities are by a little shadow
It rings, and has there is fraction of stain in the surface when storing 8d of the lotus rhizome in blank control group, sensory modalities are influenced a little, when
When storage is to 12d, surface stain is serious, and sensory modalities are poor.From table 3 it is observed that compared with the blank control of water process, Pu
Brown stain of cut lotus root degree and weight-loss ratio reduce after public English aqueous extract impregnates, therefore method provided in this embodiment can store lotus
Lotus root 12d or more, sensory properties is good, and brown stain degree and weight-loss ratio are low.
Comparative example 1
The method and step of brown stain of cut lotus root is controlled in this comparative example with embodiment 3, compared with Example 3, the main distinction
The mass concentration of dandelion Aqueous extracts used in being is 13%, and other conditions are identical.
There is stain, sense organ shape in surface when storing 12d in fresh-cut lotus root using the method storage that this comparative example provides
State is poor.The reason is that dandelion Aqueous extracts concentration is low, inhibit the active constituent content of enzymatic browning very few, to inhibition of enzymatic browning
It is insufficient.
Comparative example 2
The method and step of brown stain of cut lotus root is controlled in this comparative example with embodiment 3, compared with Example 3, the main distinction
The mass concentration of dandelion Aqueous extracts used in being is 23%, and other conditions are identical.
There is stain, sense organ shape in surface when storing 12d in fresh-cut lotus root using the method storage that this comparative example provides
State is poor.The reason is that dandelion Aqueous extracts concentration is high, inhibits the active constituent content of enzymatic browning excessive, make fresh-cut lotus root anaerobic
Breathing eventually leads to non-enzymatic browning aggravation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of method for controlling brown stain of cut lotus root, which comprises the steps of:
(1) fresh, white nothing is selected to rot, the lotus rhizome of non-brown stain, cleaning removes impurity removing, is cut into the lotus root with a thickness of 0.4-0.7cm
Piece；
(2) the lotus root piece cut is put into after impregnating 8-12min in the dandelion Aqueous extracts that mass concentration is 15-20%, dries, wraps
Dress, refrigeration.
2. the method for control brown stain of cut lotus root according to claim 1, which is characterized in that the dandelion Aqueous extracts
Mass concentration is 20%.
3. the method for control brown stain of cut lotus root according to claim 1, which is characterized in that Pu described in step (2) is public
The liquid level of English Aqueous extracts is higher by lotus root piece 2-4cm.
4. the method for control brown stain of cut lotus root according to claim 1, which is characterized in that refrigerated described in step (2)
Temperature be 2-8 DEG C.
5. the method for control brown stain of cut lotus root according to any one of claims 1-4, which is characterized in that the Pu is public
The preparation step of English Aqueous extracts is as follows:
(1) preparation of dandelion powder: by dandelion drying, cooling, crushing, sieving, dandelion powder is obtained；
(2) preparation of dandelion extracting solution: dandelion powder is soaked in water 20-40min, the mass ratio of the dandelion powder and water
It is cooled to room temperature, then microwave heating 2-5min, is cooled to room temperature for 1:(14-16), microwave heating 2-5min, be centrifuged, take supernatant
Liquid water bath with thermostatic control 12-18min at 75-85 DEG C, is cooled to room temperature to get dandelion extracting solution；
(3) preparation of dandelion Aqueous extracts: the ratio by dandelion extracting solution and water according to mass ratio for 1:(4-5.7) is matched
It makes to obtain the final product.
6. the method for control brown stain of cut lotus root according to claim 5, which is characterized in that dried described in step (1)
Temperature be 55-65 DEG C.
7. it is according to claim 5 control brown stain of cut lotus root method, which is characterized in that step (1) it is described sieving be
Cross 60-80 mesh.
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| CN109169891A (en) * | 2018-10-24 | 2019-01-11 | 韶关学院 | A method of fresh-cut taro quality is kept using fragrant plant extract |
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Application publication date: 20190607 |