CN104304442B - A kind of tomato coating-film fresh-keeping method - Google Patents

A kind of tomato coating-film fresh-keeping method Download PDF

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CN104304442B
CN104304442B CN201410586318.2A CN201410586318A CN104304442B CN 104304442 B CN104304442 B CN 104304442B CN 201410586318 A CN201410586318 A CN 201410586318A CN 104304442 B CN104304442 B CN 104304442B
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tomato
fresh
keeping
film forming
film
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CN104304442A (en
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张刚
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Guangzhou Huaren cross border trade Co.,Ltd.
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张刚
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Abstract

The invention discloses a kind of tomato coating-film fresh-keeping method, comprise the following steps:(1) pretreatment of raw material;(2) soak;(3) film forming preservation.The present invention uses mass concentration to be cleaned for 0.3~0.5% sodium bicarbonate solution to tomato, cleaning performance is good, the filming performance of antistaling agent can be substantially improved, fresh-keeping film forming solution is enabled uniformly to be attached to tomato surface, and using immersion, the air-dried mode of cold wind carries out coating-film fresh-keeping to tomato, improvement is optimized to fresh-keeping film forming solution in characteristic for tomato, the mutual Synergistic of each component in fresh-keeping film forming solution, it is safe and efficient, cost is low, filming performance is good, tomato outward appearance can be improved, extend tomato preservation phase, whole method processing step is simple, it is workable, efficiency high, equipment investment is few, Environmental Safety, quality of forming film is good, it is adapted to industrialized production.

Description

A kind of tomato coating-film fresh-keeping method
Technical field
The present invention relates to food preservative technology field, more particularly, to a kind of tomato coating-film fresh-keeping method.
Background technology
Tomato also known as tomato, are 1 year raw herbaceous plant of Solanaceae, how perennial are in the torrid zone.Due to tomato moisture content Height, fresh and tender thin skin, is easily damaged, and many inconvenience are brought to storing, many easily by epidemic disease, soft rot, real maize ear rot etc. in storage period The influence of kind of disease is infected, and easily causes to go mouldy rotten.
Domestic existing frequently-used tomato pr eservation technology mainly has cold storing and fresh-keeping and controlled atmosphere, controlled atmosphere etc., but above-mentioned There is cost height, not easy-operating shortcoming in technology.Therefore, develop and improve the preserving and storing techniques to tomato, with very aobvious The economic benefit and social benefit of work.
Coating-film fresh-keeping method is the popular new technology fresh-keeping to food progress domestic and international at present, and it is with large biological molecule (such as polysaccharide, protein and lipid) is raw material, and food surface is covered in or interior by forms such as parcel, dipping, coating, sprinklings One layer of portion can by feeding habits material composition film, reduce germ contamination, prevent microorganism grow, weaken air oxidation, slow down Lipid oxidation rates, for example, application publication number CN103392786A, disclosed in data of publication of application 2013.11.20 Chinese patent A kind of tomato pr eservation method, by the tomato pr eservation agent even application that has configured on the eighty per cant ripe tomato harvested, spray Mist once afterwards dries tomato naturally, and tomato is cased with plastics fruit and vegetable box, is put into the warehouse that temperature is 12~18 DEG C, is put into Need that ultraviolet disinfection 4 hours or so will be used in warehouse before warehouse.Antistaling agent is sprayed onto tomato by the preservation method using spraying method Surface, efficiency is low, and uneven, is dried naturally after spraying, and film forming speed is slow and uneven, and what is used in addition in this method is fresh-keeping The raw material that agent is matched by following weight parts is constituted:It is 50~50 parts of light-coloured vinegar, 50~150 parts of konjaku powder, 5~15 parts of vitamin E, micro- 100000 parts of raw element B5~15 part and pure water, the antistaling agent is using konjaku powder as film forming agent, because tomato surface is smooth, should Antistaling agent is difficult uniformly to be attached to tomato surface filming, and filming performance is poor, in addition, existing on the film of antistaling agent formation larger Gap, it is impossible to effectively reduce the evaporation of tomato moisture, cause tomato weight-loss ratio larger, and the function of the antistaling agent is single.
The content of the invention
The present invention be in order to which the tomato pr eservation method efficiency for solving prior art is low, the problem of fresh-keeping effect is poor there is provided A kind of processing step is simple, and workable, equipment investment is few, Environmental Safety, is adapted to industrialized production, can greatly improve tomato The tomato coating-film fresh-keeping method of fresh-keeping effect.
To achieve these goals, the present invention uses following technical scheme:
A kind of tomato coating-film fresh-keeping method, comprises the following steps:
(1) pretreatment of raw material:Selection has no mechanical damage, without rotten spot, has the tomato of the colored base of a fruit of green as fresh-keeping object, general kind After eggplant is cleaned with mass concentration for 0.3~0.5% sodium bicarbonate solution, drain.Tomato use mass concentration for 0.3~ 0.5% sodium bicarbonate solution cleaning, cleaning performance is good, most importantly, remains in the sodium ion positively charged on tomato surface Lotus, can substantially improve the filming performance of fresh-keeping film forming solution so that fresh-keeping film forming solution can uniformly be attached to tomato surface.
(2) soak:Tomato in step (1) is placed in fresh-keeping film forming solution to soak and taken out after 10~20min, it is described to protect Fresh film forming solution is made up of the component of following mass percent:0.5~1% lecithin, 0.05~0.1% phytic acid, 1~2% gathers Oxygen ethene sorbitan mono-oleic acid ester, 0.05~0.1% konjacmannan, 0.1~0.3% xanthans, 0.2~0.4% chlorine Change sodium, 0.3~0.5% nano silicon, 0.5~1% glycerine, 0.3~0.5% calgon, surplus carries for cape jasmine Take liquid.Improvement is optimized to fresh-keeping film forming solution for the characteristic of tomato in the present invention, wherein, lecithin can suppress tomato Respiration and the growth of pathogen, extend the period of storage of tomato to greatest extent, reduce the rotting rate of tomato, and lecithin The hydrophilic radical of fat can also keep tomato peel to moisten, and improve the glossiness of tomato;Phytic acid can prevent tomato surface from rotten spot occur And ascorbic loss;Tween-80 (Tween-80) plays a part of emulsifying agent, improves fresh-keeping The stability of agent;Konjacmannan and xanthans are film forming matter, and konjacmannan filming performance is good, can continue to keep The gloss on tomato surface, konjacmannan and the mutual synergy of both xanthans so that film is in gel state, so that The elastic and rigid of film is substantially improved, but with there is more gap on the film of xanthans formation in konjacmannan, It can make it that the OTR oxygen transmission rate and moisture-vapor transmission of film are higher, influence fresh-keeping effect, therefore the present invention with the addition of cape jasmine and carry Take the polysaccharide component in liquid, gardenia extract to occur coupling connection with konjacmannan and xanthans, make konjacmannan There is viscosity well between xanthans, the gap on film can be greatly reduced, so as to preferably hinder the saturating of gas molecule Cross, in addition, gardenia extract also has the effect of sterilization and anticorrosion, fresh-keeping effect can be improved;Sodium chloride is coalescents, can be improved thin The transparency of film is so as to improve the outward appearance of tomato;Nano silicon can strengthen fresh keeping property, and can absorb tomato in storage During the pernicious gas such as the ethene that produces, to reduce dematuration of the gases such as ethene to tomato, but nano silicon point Dissipate property poor, and glycerine and calgon act synergistically nano silicon can be made dispersed in antistaling agent, the third three Alcohol can also reduce the moisture-vapor transmission and OTR oxygen transmission rate of film, and can increase the plasticity of film, and glossiness is more preferable.This hair The mutual Synergistic of each component in bright fresh-keeping film forming solution, safe and efficient, cost is low, and filming performance is good, can improve outside tomato See, extend tomato preservation phase.
(3) film forming preservation:After being air-dried to the tomato progress cold wind in step (2), it is placed under 10~15 DEG C of environment and stores i.e. Can.Otherwise kind air-dried using cold wind, not only film forming efficiency is high, and the quality of film is good, and refrigerated storage temperature can not be too high or too low, Eggplant easily occurs to rot or damage to plants caused by sudden drop in temperature.
Preferably, the mass ratio of tomato and fresh-keeping film forming solution is 1: 3~5, the temperature of fresh-keeping film forming solution in step (2) Spend for 20~30 DEG C.
Preferably, the gardenia extract is made by the following method:Cape jasmine is placed in after soaking 1~2h in clear water and dragged for Go out to drain, then 20~30min is boiled after the water of 5~8 times of amounts of addition into cape jasmine, filter, 5~8 times of amounts are added in filter residue Water boil after 20~30min filter, merge twice filtrate produce gardenia extract.
Preferably, in step (3), the air-dried technological parameter of cold wind is:Cold wind temperature is 10~15 DEG C, and cold wind wind speed is 1~3m/s.
Therefore, the present invention has the advantages that:
(1) mass concentration is used to be cleaned for 0.3~0.5% sodium bicarbonate solution to tomato, cleaning performance is good, energy Substantially improve the filming performance of antistaling agent so that antistaling agent can uniformly be attached to tomato surface;
(2) characteristic for tomato fresh-keeping film forming solution is optimized each component in improvement, fresh-keeping film forming solution Mutual Synergistic, safe and efficient, cost is low, and filming performance is good, can improve tomato outward appearance, extends tomato preservation phase;
(3) coating-film fresh-keeping is carried out to tomato by the way of immersion, cold wind are air-dried, processing step is simple, workable, Efficiency high, equipment investment is few, Environmental Safety, and quality of forming film is good, is adapted to industrialized production.
Embodiment
Below by embodiment, the present invention will be further described.
In the present invention, if not refering in particular to, all percentages are unit of weight, and all devices and raw material can be purchased from market Or the industry it is conventional, the method in following embodiments is this area conventional method unless otherwise instructed.
Embodiment 1
(1) pretreatment of raw material:Selection has no mechanical damage, without rotten spot, has the tomato of the colored base of a fruit of green as fresh-keeping object, general kind After eggplant is cleaned with mass concentration for 0.4% sodium bicarbonate solution, drain;
(2) soak:Tomato in step (1) is placed in 4 mass times, temperature is immersion in 25 DEG C of fresh-keeping film forming solution Taken out after 15min, fresh-keeping film forming solution is made up of the component of following mass percent:0.6% lecithin, 0.06% phytic acid, 1.5% Tween-80,0.06% konjacmannan, 0.2% xanthans, 0.3% sodium chloride, 0.4% nano silicon, 0.6% glycerine, 0.4% calgon, surplus is gardenia extract, wherein gardenia extract It is made by the following method:Cape jasmine is placed in clear water to soak to pull out after 1.5h and drained, then is added into cape jasmine after the water of 6 times of amounts 22min is boiled, is filtered, the water that 6 times of amounts are added in filter residue are boiled and filtered after 22min, are merged filtrate twice and are produced cape jasmine and carry Take liquid.
(3) film forming preservation:After being air-dried to the tomato progress cold wind in step (2), it is placed under 11 DEG C of environment and stores, it is cold The air-dried technological parameter of wind is:Cold wind temperature is 12 DEG C, and cold wind wind speed is 2m/s.
Embodiment 2
(1) pretreatment of raw material:Selection has no mechanical damage, without rotten spot, has the tomato of the colored base of a fruit of green as fresh-keeping object, general kind After eggplant is cleaned with mass concentration for 0.3% sodium bicarbonate solution, drain;
(2) soak:Tomato in step (1) is placed in 3 mass times, temperature is immersion in 20 DEG C of fresh-keeping film forming solution Taken out after 10min, fresh-keeping film forming solution is made up of the component of following mass percent:0.5% lecithin, 0.05% phytic acid, 1% Tween-80,0.05% konjacmannan, 0.1% xanthans, 0.2% sodium chloride, 0.3% nanometer Silica, 0.5% glycerine, 0.3% calgon, surplus is gardenia extract, and wherein gardenia extract passes through following Method is made:Cape jasmine is placed in clear water to soak to pull out after 1h and drained, then 20min is boiled after the water of 5 times of amounts of addition into cape jasmine, Filtering, the water that 5 times of amounts are added in filter residue boils filtering after 20min, merges filtrate twice and produces gardenia extract.
(3) film forming preservation:After being air-dried to the tomato progress cold wind in step (2), it is placed under 10 DEG C of environment and stores, it is cold The air-dried technological parameter of wind is:Cold wind temperature is 10 DEG C, and cold wind wind speed is 3m/s.
Embodiment 3
(1) pretreatment of raw material:Selection has no mechanical damage, without rotten spot, has the tomato of the colored base of a fruit of green as fresh-keeping object, general kind After eggplant is cleaned with mass concentration for 0.5% sodium bicarbonate solution, drain;
(2) soak:Tomato in step (1) is placed in 5 mass times, temperature is immersion in 30 DEG C of fresh-keeping film forming solution Taken out after 20min, fresh-keeping film forming solution is made up of the component of following mass percent:1% lecithin, 0.1% phytic acid, 2% gathers Oxygen ethene sorbitan mono-oleic acid ester, 0.1% konjacmannan, 0.3% xanthans, 0.4% sodium chloride, 0.5% nanometer two Silica, 1% glycerine, 0.5% calgon, surplus is gardenia extract, and wherein gardenia extract is by the following method It is made:Cape jasmine is placed in clear water to soak to pull out after 2h and drained, then 30min, mistake are boiled after the water of 8 times of amounts of addition into cape jasmine Filter, the water that 8 times of amounts are added in filter residue boils filtering after 30min, merges filtrate twice and produces gardenia extract.
(3) film forming preservation:After being air-dried to the tomato progress cold wind in step (2), it is placed under 15 DEG C of environment and stores, it is cold The air-dried technological parameter of wind is:Cold wind temperature is 15 DEG C, and cold wind wind speed is 1m/s.
Comparative example
Drained after being cleaned to tomato using clear water, be placed under 15 DEG C of environment and store.
10Kg fresh tomatos are taken uniformly to be divided into tetra- groups of A, B, C, D by weight, wherein the tomato of A, B, C group is respectively according to implementation Preservation method processing in example 1,2,3, the tomato of D groups is handled according to the method for comparative example.Storage determines each group tomato after 60 days Organoleptic indicator, hardness, rotting rate, weight-loss ratio and the Vitamin C content of sample, wherein organoleptic indicator is by directly observing tomato Pericarp and Hua Di colors, gloss, plumpness are obtained;Hardness is determined using TG-2 type hardness testers meter;Rotting rate is determined using observation method, Rotting rate=(decayed fruit number/storage total fruit number) * 100%;Weight-loss ratio=(weight loss/Initial total weight) * 100%;Vitamin C contains Amount uses determined by ultraviolet spectrophotometry, and unit is represented with mg/100g.
Measurement result is as shown in the table:
As can be seen from the above table, the organoleptic indicator of the tomato stored by the preservation method of each embodiment, hardness, vitamin Content is significantly better than that comparative example, and rotting rate, weight-loss ratio are significantly lower than comparative example, illustrates the tomato coating-film fresh-keeping side of the present invention Method can effectively suppress the respiratory rate of tomato, reduce moisture loss, and slow down the ascorbic loss of nutriment in tomato, change The outward appearance and storage quality of kind tomato, the preservation and freshness effect to tomato is good, and processing step is simple, workable, effect Rate is high, and equipment investment is few, and Environmental Safety, quality of forming film is good, is adapted to industrialized production, with larger application value.
Embodiment described above is a kind of preferably scheme of the present invention, not makees any formal to the present invention Limitation, also has other variants and remodeling on the premise of without departing from the technical scheme described in claim.

Claims (3)

1. a kind of tomato coating-film fresh-keeping method, it is characterised in that comprise the following steps:
(1) pretreatment of raw material:Selection has no mechanical damage, without rotten spot, has the tomato of the green flower base of a fruit as fresh-keeping object, tomato is used After mass concentration is 0.3~0.5% sodium bicarbonate solution cleaning, drain;
(2) soak:By the tomato in step (1) be placed in fresh-keeping film forming solution soak 10~20min after take out, tomato with it is fresh-keeping The mass ratio of film forming solution is 1: 3~5, and the temperature of fresh-keeping film forming solution is 20~30 DEG C, and the fresh-keeping film forming solution is by following The component composition of mass percent:0.5~1% lecithin, 0.05~0.1% phytic acid, 1~2% polyoxyethylene sorbitol acid anhydride list Oleate, 0.05~0.1% konjacmannan, 0.1~0.3% xanthans, 0.2~0.4% sodium chloride, 0.3~0.5% receives Rice silica, 0.5~1% glycerine, 0.3~0.5% calgon, surplus is gardenia extract;
(3) film forming preservation:After being air-dried to the tomato progress cold wind in step (2), it is placed under 10~15 DEG C of environment and stores.
2. a kind of tomato coating-film fresh-keeping method according to claim 1, it is characterised in that the gardenia extract by with Lower section method is made:Cape jasmine is placed in clear water to soak to pull out after 1~2h and drained, then is endured into cape jasmine after the water of 5~8 times of amounts of addition 20~30min is made, filtering, the water that 5~8 times of amounts are added in filter residue boils filtering after 20~30min, merge filtrate twice and be Obtain gardenia extract.
3. a kind of tomato coating-film fresh-keeping method according to claim 1, it is characterised in that in step (3), what cold wind was air-dried Technological parameter is:Cold wind temperature is 10~15 DEG C, and cold wind wind speed is 1~3m/s.
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CN105053173A (en) * 2015-08-27 2015-11-18 太仓市永发农场专业合作社 Tomato preservative
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CN106615054B (en) * 2016-12-16 2020-07-31 河北省农林科学院石家庄果树研究所 Comprehensive storage and preservation treatment method for Huangguan pears
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CN109744476A (en) * 2019-03-04 2019-05-14 嘉兴市真真老老食品有限公司 Zongzi's cooking technique in industrialization large-scale production

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