CN101623027A

CN101623027A - Fruit and vegetable fresh-keeping agent

Info

Publication number: CN101623027A
Application number: CN200910017537A
Authority: CN
Inventors: 宋洪英
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-08-05
Filing date: 2009-08-05
Publication date: 2010-01-13

Abstract

The invention provides a fresh-keeping agent, in particular to a fruit and vegetable fresh-keeping agent which mainly comprises active carbon, sulfur dioxide releasing agent and water absorbent; as the sulfur dioxide releasing agent can slowly release sulfur dioxide gas, spore on the surfaces of fruits and vegetables as well as mould causing the fruits and the vegetables to decay can be killed; the active carbon not only can be used for filtering harmful substances in the air, but also can be used as bidirectional water absorbent, thus ensuring the fruits and the vegetables not to decay due to excessive moisture and realizing fresh-keeping storage of the fruits and the vegetables.

Description

A kind of fruit and vegetable fresh-keeping agent

Technical field

The present invention relates to a kind of antistaling agent, a kind of fruit and vegetable fresh-keeping agent specifically is provided.

Background technology

Along with people's growth in the living standard, fruit variety on the market and output also increase day by day, and people not only need to change the fruit of different cultivars, and for the freshness of fruit high requirement have been arranged also.Yet tend in the fruit contain more moisture content, the time that puts up stores of fruits is long, can make fruit dehydration and spoiled, also can make fruit excessive and rotten because of ambient humidity; Fruit still has vital movement in the phase of depositing simultaneously, absorbs oxygen, gives off carbon dioxide, thereby in the process of carrying out autoxidation, can cause temperature to rise.If the storage time is longer, heat is difficult for distributing fruit again and will rots, go bad, and has both polluted environment, brings economic loss again.Simultaneously, more accelerated the rotten speed of fruits and vegetables, and produced various toxin and influence health because the mould that exists in the air etc. can be attached directly to fruit and vegetable surfaces by air.

Existing fruit freshness preserving mainly is a low-temperature preservation, keep dry simultaneously and circulation of air, but there is more drawback in this mode, has very big refrigerating chamber as needs, and investment is big, takes up an area of greatly, and power consumption is big, and expense is bigger.Another fruit freshness preserving commonly used adopts plastic sheeting, it all coats every fruit, allow it keep respiration slowly, shortcoming is that the heat that produces is difficult for distributing, and places some months, and fruit still can rot, and plastic sheeting manufacturing process complexity, production cost is higher, and is difficult for degraded, causes environmental pollution easily.Therefore anxious a kind of antistaling agent that can address the above problem to be supplied guarantees the fresh of fruits and vegetables.

Summary of the invention

The present invention is directed to the deficiency of existing postharvest technology of fruits and vegetables, a kind of fruit and vegetable fresh-keeping agent is provided, it mainly comprises active carbon, sulfur dioxide releasing agent and water absorbing agent, adopt the fruit and vegetable fresh-keeping agent of this component, because the sulfur dioxide releasing agent can discharge sulfur dioxide gas slowly, thereby the mould that has killed the spore of fruit and vegetable surfaces and caused fruits and vegetables to rot, and the harmful substance of active carbon in can filtered air, can also use as two-way water absorbing agent, not only guaranteed the moisture of fruits and vegetables but can not cause owing to moisture is excessive rotten, thereby realized the insurance storage of fruits and vegetables.

Technical scheme of the present invention is as follows: the prescription of this fruit and vegetable fresh-keeping agent is as follows: by weight:

15～25 parts of active carbons,

Sulfur dioxide releasing agent 60-80 part,

Water absorbing agent 15-20 part,

Acidic intermedium 5-10 part

The sulfur dioxide releasing agent that is adopted in the above-mentioned prescription mainly can use pyrosulfite, mainly adopts its metallic salt material, and such material can react in sour environment, discharges sulfur dioxide gas, and SO ₂Gas is as a kind of effective biostatic agent, the growth and the killing spores that can effectively suppress bacteriums such as fungi, thereby in the generation of fundamentally having effected a radical cure phenomenons such as the fruits and vegetables that cause owing to fungal infection rot, in order to make it reach best releasing effect, preferably adopting its weight portion is 75 parts; Because most sulfur dioxide releasing agents such as pyrosulfite need sour environment just can finish chemical reaction, thereby discharge SO ₂Gas, therefore in prescription, must add the material that keeps environment acidity, therefore in prescription, added acidic intermedium, this acidic intermedium generally can be selected ammonium salt for use, as strong acid weak base salt materials such as ammonium sulfate or ammonium chlorides, such material can be hydrolyzed to acidic materials under the effect of water in air part, thereby the assurance pyrosulfite can be finished reaction, and the weight portion that preferably adopts its consumption is 10 parts.

In proportioning, also be added with water absorbing agent, its general optional with absorbent materials such as anhydrous sodium sulfates as water absorbing agent, also can adopt other absorbent materials commonly used on the market, the existence of water absorbing agent absorbs the excessive moisture in the fruit, prevents owing to the respiration of fruits and vegetables and excessive the rotten of fruits and vegetables that cause of humidity of environment itself, the existence of water absorbing agent simultaneously, make the hydrolysis of acidic intermedium to carry out slowly, can be owing to quick hydrolysis does not take place in excess moisture in the environment, thus cause SO ₂Gas generated too high, and work as SO ₂When gas concentration is too high, lose intrinsic colour thereby can cause fruits and vegetables to be bleached, can cause fruits and vegetables to send niff simultaneously, make fruits and vegetables to eat normally, the weight portion that preferably adopts its consumption is 20 parts.

Added the active carbon of 15-25 part in the prescription, because the porous character of active carbon itself, can effectively adsorb the impurity in the environment, prevent its pollution for fruits and vegetables, simultaneously active carbon also is a kind of water absorbing agent preferably, mixes use with above-mentioned water absorbing agent and can reach better effect, because active carbon itself is a kind of reversible absorbent material, can be used as effectively replenishing of water absorbing agent, prevent to cause the humidity of fruits and vegetables storage condition too high when water absorbing agent is not enough, and cause fruits and vegetables to rot; And owing to acidic intermedium need be hydrolyzed and can play a role, not enough and make the situation that acidic intermedium can't hydrolysis in order to prevent the too high ambient moisture that causes of water absorbing agent consumption, the invertibity of active carbon suction character just can till assurance preferably is provided, when ambient moisture is crossed when low, the moisture that adsorbs in the active carbon can discharge as early as possible, for acidic intermedium provides the condition of hydrolysis, thereby make that whole antistaling agent is played a role.The active carbon that is adopted among the present invention can directly adopt food grade active carbon commonly used on the market, and in order to reach best result of use, preferably its weight portion is 20 parts.

In sum, the fruit and vegetable fresh-keeping agent of this component provided by the invention, because the sulfur dioxide releasing agent can discharge sulfur dioxide gas slowly, thereby the mould that has killed the spore of fruit and vegetable surfaces and caused fruits and vegetables to rot, and the harmful substance of active carbon in can filtered air, can also use as two-way water absorbing agent, not only guaranteed the moisture of fruits and vegetables but also can not cause the environmental condition of rotting and necessity being provided for the hydrolysis of acidic intermedium owing to moisture is excessive, thereby realized the insurance storage of fruits and vegetables, and guaranteed the freshness of fruits and vegetables in storage process.

The specific embodiment

Following examples only are used to further specify the present invention, but do not limit the present invention.

Embodiment 1:

Its component of fruit and vegetable fresh-keeping agent that present embodiment adopts is by weight:

Active carbon 20g

Sodium pyrosulfite 75g

Anhydrous sodium sulfate 20g

Ammonium sulfate 10g.

Fruit and vegetable fresh-keeping agent provided by the present invention, its processing method is as follows:

Press the prescription proportioning with active carbon and ammonium sulfate oven dry, guarantee to insert in the closed container after its moisture is lower than 1.5% (wt%);

Join in the above-mentioned composition after anhydrous sodium sulfate and sodium pyrosulfite mixed, mix pack and get final product.

Embodiment 2:

Active carbon 15g

Sodium pyrosulfite 60g

Anhydrous magnesium sulfate 18g

Ammonium sulfate 8g.

Press the prescription proportioning with active carbon and ammonium sulfate oven dry, guarantee to insert in the closed container after its moisture is lower than 3% (wt%);

Join in the above-mentioned composition after anhydrous sodium sulfate and sodium pyrosulfite mixed, mix pack and get final product

Embodiment 3

Active carbon 25g

Sodium pyrosulfite 80g

Anhydrous sodium sulfate 15g

Ammonium chloride 5g.

Press the prescription proportioning with active carbon and ammonium chloride oven dry, guarantee to insert in the closed container after its moisture is lower than 1.5% (wt%);

Claims

1. fruit and vegetable fresh-keeping agent is characterized in that: its component by weight:

15～25 parts of active carbons

Sulfur dioxide releasing agent 60-80 part

Water absorbing agent 15-20 part

Acidic intermedium 5-10 part.

2. fruit and vegetable fresh-keeping agent according to claim 1 is characterized in that: its component by weight:

20 parts of active carbons

75 parts of sulfur dioxide releasing agents

20 parts of water absorbing agents

10 parts of acidic intermediums.

3. fruit and vegetable fresh-keeping agent according to claim 1 and 2 is characterized in that: described sulfur dioxide releasing agent adopts pyrosulfite.

4. fruit and vegetable fresh-keeping agent according to claim 1 and 2 is characterized in that: described water absorbing agent adopts anhydrous sodium sulfate.

5. fruit and vegetable fresh-keeping agent according to claim 1 and 2 is characterized in that: described acidic intermedium adopts ammonium sulfate or ammonium chloride or its mixture.