CN103636772B - A kind of preservation method of belt leather lotus rhizome - Google Patents
A kind of preservation method of belt leather lotus rhizome Download PDFInfo
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- CN103636772B CN103636772B CN201310649893.8A CN201310649893A CN103636772B CN 103636772 B CN103636772 B CN 103636772B CN 201310649893 A CN201310649893 A CN 201310649893A CN 103636772 B CN103636772 B CN 103636772B
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- lotus rhizome
- composite coating
- onion
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Abstract
The present invention relates to a kind of preservation method of lotus rhizome, particularly a kind of composite coating preservative utilizing plurality of reagents to make carries out the preservation method of the fresh-cut lotus root sheet of Preservation Treatment.The method chooses after onion squeezes the juice, with shitosan, sodium alginate, modified Nano SiO
xdeng material mixing, then with obtaining composite coating preservative after citric acid adjust ph, then will be immersed in composite coating preservative through pretreatment lotus rhizome and carry out Preservation Treatment, and finally adopt vacuum packaging, refrigerate under being placed in suitable condition.The composite preservative that the present invention utilizes plurality of reagents to make as the antistaling agent of fresh-cut lotus root sheet, good refreshing effect, freshness date can reach more than 5 months, solve fresh lotus rhizome sheet storage time brown stain, hardness reduce and weight under degradation problem.The advantages such as in addition, it is simple that the present invention also has process, and cost is low, green, environmental protection, convenient.
Description
Technical field
The present invention relates to a kind of preservation method of belt leather lotus rhizome, particularly a kind of composite coating preservative utilizing plurality of reagents to make carries out the preservation method of the belt leather lotus rhizome of Preservation Treatment.
Background technology
Lotus rhizome is the important aquatic vegetable of China, is mainly distributed in Yangtze River Delta, the Delta of the Pearl River, Dongting Lake one band.At present, in China, lotus rhizome planted area has reached more than 3,000,000 sq-kms, accounts for 1/3 of aquatic vegetable cultivated area.Northern China and international market being in great demand to lotus rhizome, but its sale and outlet is affected because of lotus rhizome water content high, easy brown stain, not storage tolerance and transport.Therefore, the present invention mainly studies composite preservative to belt leather lotus rhizome coating-film fresh-keeping, to keep the nutritive value of lotus rhizome in storage, thus effectively improves the value of lotus rhizome.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of composite coating preservative utilizing plurality of reagents to make as the antistaling agent of belt leather lotus rhizome, good refreshing effect, freshness date can reach the preservation method of the belt leather lotus rhizome of more than 5 months, solve fresh lotus rhizome storage time brown stain, hardness reduce and weight under degradation problem.
The technical scheme solved the problems of the technologies described above is: a kind of preservation method of belt leather lotus rhizome, comprises the following steps:
(1) selection of raw material lotus rhizome: select mechanical wound, without disease and pest, fresh lotus rhizome;
(2) clean: with water, lotus root washing is clean;
(3) sterilizing: the lotus rhizome after cleaning up is put into 80-100mg/L ClO 2 solution, soaked after 15-20 minute, by the clear water rinsing of the lotus rhizome through sterilizing, to remove residual ClO
2, taking-up drains;
(4) protect crisp: the lotus rhizome after sterilizing being added mass concentration is in the calcium chloride solution of 0.3-0.6%, soak 15-20min;
(5) configuration of composite coating preservative: choose onion, peel off crust, squeeze the juice after being cut into small pieces, filter, then be the obtained onions extracting liquid of 1:5-20 by the weight ratio of Conditions of Onion Juice and water, in onions extracting liquid, add shitosan, sodium alginate, modified Nano SiO
xmake composite coating preservative, in composite coating preservative, the mass concentration of shitosan is 1-2%, sodium alginate mass concentration is 0.4-0.8%, modified Nano SiO
xmass concentration is 0.02-0.03%, then regulates the pH value of composite coating preservative to be 4.1-5.0 with citric acid;
(6) Preservation Treatment: be immersed in 5-10 minute in the composite preservative that step (5) configures after the lotus rhizome after step (4) being processed drains, the volume ratio of lotus rhizome and composite preservative is 1:2-3, and taking-up drains, treats lotus rhizome surface formation thin film.
(7) pack, refrigerate: by the lotus rhizome vacuum packaging after Preservation Treatment, refrigerate under being then placed in 2-5 DEG C of condition.
Described modified Nano SiO
xpreparation method be: by Nano-meter SiO_2
xjoining mass concentration is in 0.6-0.8%SDS solution, SiO
xwith the ratio of SDS solution be: 1g: 190-210mL, regulate pH=3.8-4.3 with citric acid, suction filtration after stirring 6-7h, gets precipitation and washes with water 2-4 time, and dry in 80-85 DEG C of baking oven, mortar is ground into fine powder shape, obtains modified Nano SiO
x, the value of X is 0.4-0.8.
Lotus rhizome described in step (1) chooses fresh lotus rhizome, the lotus rhizome be namely unearthed in 2 days; Onion described in step (5) chooses fresh onion, the onion of being namely unearthed in 10 days.
LDPE bag is selected in vacuum-packed packaging bag.
Owing to adopting above-mentioned processing step, the preservation method of a kind of fresh-cut lotus root sheet of the present invention, has following beneficial effect:
1. the present invention's composite coating preservative of adopting plurality of reagents to make is for the Preservation Treatment of whole cylinder belt leather lotus rhizome, and the brown stain when composite coating preservative of this formula can to some extent solve the storage of fresh belt leather lotus rhizome, hardness reduce and degradation problem under weight.To keep the nutritive value of lotus rhizome in storage, solve the easy brown stain of lotus rhizome, not storage tolerance and transport and affect its sale and outlet, thus effectively improving the value of lotus rhizome.
2. good refreshing effect: the present invention have selected best process conditions, can reach good fresh-keeping effect, experiment confirms, the belt leather lotus rhizome freshness date after adopting the present invention fresh-keeping can reach more than 5 months, extends the shelf life of lotus rhizome, is beneficial to foreign exchange earning.
3. process of the present invention is simple, and cost is low, green, and environmental protection is convenient.
Below, in conjunction with the accompanying drawings and embodiments the technical characteristic of the preservation method of a kind of belt leather lotus rhizome of the present invention is further described.
Accompanying drawing explanation
Fig. 1: the process chart of the preservation method of a kind of belt leather lotus rhizome of the present invention.
Detailed description of the invention
Embodiment 1: a kind of preservation method of belt leather lotus rhizome, comprises the following steps:
(1) selection of raw material lotus rhizome: lotus rhizome buy return after, select fresh, fine and tender taste is abundant, without significant mechanical damage, without disease and pest, fresh lotus rhizome.Reject major injuries, have disease and too small and too thick lotus rhizome.
(2) clean: wash away silt on lotus rhizome and other impurity with water, lotus root washing is clean; Not handy hard object (as straw, woven bag) is washed by rubbing with the hands, with scratching lotus root skin, causes brown stain and rots.
(3) sterilizing: lotus rhizome is put into 100mg/L ClO 2 solution, soak after 15 minutes and take out, by the lotus rhizome sheet clear water rinsing through sterilizing, to remove residual ClO2, taking-up drains.
(4) keeping colour and crisp: lotus rhizome being added mass concentration is in the calcium chloride solution of 0.4%, soaks 15min.
(5) configuration of composite coating preservative: choose onion, peel off crust, squeeze the juice after being cut into small pieces, filters, and is then the obtained onions extracting liquid of 1:10 by the weight ratio of Conditions of Onion Juice and water.Shitosan, sodium alginate, modified Nano SiO is added in onions extracting liquid
xmake composite coating preservative, in composite coating preservative, the mass concentration of shitosan be 1.5%, sodium alginate mass concentration is 0.6%, modified Nano SiO
xmass concentration is 0.02%, then regulates the pH value of composite coating preservative to be 4.7 with citric acid; Described modified Nano SiO
xpreparation method be: by 1g Nano-meter SiO_2
xjoining 200mL mass concentration is in 0.7%SDS solution (sodium dodecyl sulfate solution), regulates pH=4.0 with citric acid, and suction filtration after stirring 6h, gets precipitation and wash with water 2-4 time, and dry in 80 DEG C of baking ovens, mortar is ground into fine powder shape, obtains modified Nano SiO
x, the value of X is 0.4-0.8.
(6) Preservation Treatment: be immersed in the composite preservative that step (5) configures 5-10 minute (volume ratio of lotus rhizome and composite preservative is 1:3) after the lotus rhizome after step (4) being processed drains, taking-up drains, treats lotus rhizome surface formation thin film.
(7) pack, refrigerate: by the lotus rhizome vacuum packaging after Preservation Treatment, LDPE bag is selected in packaging bag, refrigerates under being then placed in 2-5 DEG C of condition.
Raw material lotus rhizome in the present invention, onion, choose the good lotus rhizome of the preservation that market is sold and onion.But in order to obtain better fresh-keeping effect, the lotus rhizome optimal selection chosen in step (1) require to select fresh, fine and tender taste is abundant, without significant mechanical damage, fresh lotus root without disease and pest, non-brown stain, described fresh lotus rhizome refers to the lotus rhizome in unearthed 2 days; The onion that onion optimal choice described in step (5) is fresh, the onion of being namely unearthed in 5 days.
One as the present embodiment converts, the composite coating preservative process lotus rhizome sheet that following condition also can be adopted to prepare: the weight ratio of step (5) Conditions of Onion Juice and water is that 1:5 counts obtained onions extracting liquid, in composite coating preservative, the concentration of shitosan is 2%, sodium alginate concentration is 0.5%, modified Nano SiO
xconcentration is 0.03%, then regulates the pH value of composite coating preservative to be 4.1 with citric acid.
One as the present embodiment converts, and described vacuum-packed packaging bag can also select other suitable packaging bags.
After harvesting lotus root, vital movement is still being carried out.Due to transpiration and the respiration of cell, cause cell interior moisture to run off in a large number, weight-loss ratio increases.Aldehydes matter in lotus rhizome is oxidized to quinones substance through the catalytic action of polyphenol oxidase, thus causes browning reaction.The change of brown stain degree more can embody the fresh-keeping effect of antistaling agent, and the less fresh-keeping effect of brown stain degree is better.
By measuring the lotus rhizome sheet after adopting composite preservative process at duration of storage weight-loss ratio and brown stain degree changing value (result is see table 1), result shows no matter the lotus rhizome sheet that with the addition of composite preservative is in brown stain degree or weight-loss ratio etc., be obviously better than not adding composite preservative blank group.Experiment proves, adopt the lotus rhizome sheet of the inventive method process, freshness date can reach more than 5 months.
Table 1: the lotus rhizome sheet processed through embodiment 1 contrasts list with the physical signs of the blank group of not adding antistaling agent
。
Claims (2)
1. a preservation method for belt leather lotus rhizome, comprises the following steps:
(1) selection of raw material lotus rhizome: select mechanical wound, without disease and pest, fresh lotus rhizome;
(2) clean: with water, lotus root washing is clean;
(3) sterilizing: the lotus rhizome after cleaning up is put into 80-100mg/L ClO 2 solution, soaked after 15-20 minute, by the clear water rinsing of the lotus rhizome through sterilizing, to remove residual ClO
2, taking-up drains;
(4) protect crisp: the lotus rhizome after sterilizing being added mass concentration is in the calcium chloride solution of 0.3-0.6%, soak 15-20min;
(5) preparation of composite coating preservative: choose onion, peel off crust, squeeze the juice after being cut into small pieces, filter, then be the obtained onions extracting liquid of 1:5-20 by the weight ratio of Conditions of Onion Juice and water, in onions extracting liquid, add shitosan, sodium alginate, modified Nano SiO
xmake composite coating preservative, in composite coating preservative, the mass concentration of shitosan is 1-2%, sodium alginate mass concentration is 0.4-0.8%, modified Nano SiO
xmass concentration is 0.02-0.03%, then regulates the pH value of composite coating preservative to be 4.1-5.0 with citric acid; Described modified Nano SiO
xpreparation method be: by Nano-meter SiO_2
xjoining mass concentration is in 0.6-0.8%SDS solution, SiO
xwith the ratio of SDS solution be: 1g: 190-210mL, regulate pH=3.8-4.3 with citric acid, suction filtration after stirring 6-7h, gets precipitation and washes with water 2-4 time, and dry in 80-85 DEG C of baking oven, mortar is ground into fine powder shape, obtains modified Nano SiO
x, the value of X is 0.4-0.8;
(6) Preservation Treatment: be immersed in 5-10 minute in the composite coating preservative that step (5) prepares after the lotus rhizome after step (4) being processed drains, the volume ratio of lotus rhizome and composite coating preservative is 1:2-3, taking-up drains, and treats that lotus rhizome surface forms thin film;
(7) pack, refrigerate: by the lotus rhizome vacuum packaging after Preservation Treatment, refrigerate under being then placed in 2-5 DEG C of condition;
Lotus rhizome described in step (1) chooses fresh lotus rhizome, the lotus rhizome be namely unearthed in 2 days; Onion described in step (5) chooses fresh onion, the onion of being namely unearthed in 10 days.
2. the preservation method of a kind of belt leather lotus rhizome according to claim 1, is characterized in that: LDPE bag is selected in vacuum-packed packaging bag.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104705391A (en) * | 2015-03-02 | 2015-06-17 | 南京农业大学 | Coating preservative method for fresh-cut lotus roots |
| CN104982950A (en) * | 2015-06-03 | 2015-10-21 | 全椒县福润禽业有限公司 | Yin-nourishing dryness-moisturizing milk-fragrance chicken steak and preparation method thereof |
| CN105995958A (en) * | 2016-05-19 | 2016-10-12 | 丽江和融生物种植有限公司 | Toadstool processing method |
| CN106720278A (en) * | 2016-11-11 | 2017-05-31 | 天津捷盛东辉保鲜科技有限公司 | Garlic rice normal temperature fresh-keeping method |
| CN107047753A (en) * | 2017-03-27 | 2017-08-18 | 广西科技大学 | A kind of garlic and the method for the fresh-keeping lotus rhizome of Bulbus Allii Cepae extract |
| CN109527080A (en) * | 2018-09-06 | 2019-03-29 | 山东禹王生态食业有限公司 | A kind of preparation process of highly-breathable bean dregs compelx coating |
| CN110024851B (en) * | 2019-05-21 | 2022-06-14 | 华中农业大学 | Preparation of whole lotus root preservation emulsion coating and lotus root preservation method |
| CN110226624A (en) * | 2019-07-19 | 2019-09-13 | 徐州工程学院 | A kind of method that film coupling irradiation extends garlic freshness date |
| CN110226625A (en) * | 2019-07-19 | 2019-09-13 | 徐州工程学院 | A kind of method that film coupling controlled atmosphere extends garlic freshness date |
| CN110973231A (en) * | 2019-12-18 | 2020-04-10 | 长沙理工大学 | Color-protecting and fresh-keeping method for lotus seeds and fresh-keeping lotus seeds |
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| CN101103740A (en) * | 2007-07-27 | 2008-01-16 | 湖北省农业科学院农产品加工与核农技术研究所 | Aquatic vegetable anti-staling agent |
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Inventor after: Xu Jinrong Inventor after: Zhou Mingquan Inventor after: Meng Luli Inventor after: Xiong Jianwen Inventor after: Wang Chao Inventor after: Ding Youming Inventor after: Hu Zhongli Inventor before: Xu Jinrong Inventor before: Xiong Jianwen Inventor before: Meng Luli |
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