JPH05276862A - Keeping freshness - Google Patents
Keeping freshnessInfo
- Publication number
- JPH05276862A JPH05276862A JP7701992A JP7701992A JPH05276862A JP H05276862 A JPH05276862 A JP H05276862A JP 7701992 A JP7701992 A JP 7701992A JP 7701992 A JP7701992 A JP 7701992A JP H05276862 A JPH05276862 A JP H05276862A
- Authority
- JP
- Japan
- Prior art keywords
- air
- box
- aqueous solution
- tank
- vegetables
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Landscapes
- Storage Of Fruits Or Vegetables (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は青果物や花卉等の保鮮庫
に適用される保鮮方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a preserving method applied to a preserving store for fruits and vegetables and flowers.
【０００２】[0002]
【従来の技術】従来、青果物、花卉などの植物類を保鮮
する手段として、呼吸の抑制、水分蒸散の防止や老化促
進ホルモンであるエチレンの除去等があり、その具体的
方法として、酸素濃度を下げるＣＡ貯蔵、エチレン吸着
剤を入れたフィルムを用いる包装貯蔵などがあった。2. Description of the Related Art Conventionally, as a means of preserving plants such as fruits and vegetables, flowers, etc., there are suppression of respiration, prevention of water evaporation and removal of ethylene which is an aging-promoting hormone. There were lower CA storage, packaging storage using a film containing ethylene adsorbent, and the like.
【０００３】[0003]
【発明が解決しようとする課題】前記ＣＡ貯蔵は、庫内
空気環境を調節する各種の機器が必要で、運転経費やメ
ンテナンスが煩雑なため、貯蔵コストが高くなる欠点が
あった。一方フィルム包装貯蔵においては、包装材で包
むため取扱いが煩雑であり、またエチレン吸着剤の吸着
容量が小さいため、短時間で破過してしまうという問題
点があった。The above-mentioned CA storage has a drawback that the storage cost becomes high because various equipments for adjusting the air environment in the refrigerator are required and the operating cost and maintenance are complicated. On the other hand, in film packaging storage, there is a problem that handling is complicated because it is wrapped with a packaging material, and because the adsorption capacity of the ethylene adsorbent is small, it breaks through in a short time.
【０００４】本発明は、上記のような問題点を解決し、
低コストで煩雑な操作を必要としない保鮮方法を提供す
ることを目的とする。The present invention solves the above problems,
It is an object of the present invention to provide a low-cost preserving method that does not require complicated operations.
【０００５】[0005]
【課題を解決するための手段】本発明は、前記目的を達
成するために、青果物または花卉を収納する庫内の空気
を、一価の銅イオンを含む水溶液中に吹込み、同水溶液
中から再出した空気を上記庫内に戻すことを特徴とする
保鮮方法を提案するものである。In order to achieve the above-mentioned object, the present invention blows the air in the container for storing fruits and vegetables into an aqueous solution containing monovalent copper ions, The present invention proposes a method of preserving freshness, which is characterized by returning the air that has been re-emitted to the inside of the refrigerator.
【０００６】[0006]
【作用】本発明では、庫内の空気中のエチレンを一価の
銅イオン（以下銅（Ｉ）と記す）と反応させて、これを
除去することに着目した。すなわち、銅（Ｉ）水溶液に
エチレンを含んだ空気を送り込むと、エチレンは銅
（Ｉ）イオンに吸着されるが、銅（Ｉ）水溶液中では銅
（Ｉ）と酸素とが反応して酸化活性の強いヒドロキシル
ラジカル（・ＯＨ）を生じる。このラジカルが、吸着さ
れたエチレンと反応して酸化分解する。したがってエチ
レンは、銅（Ｉ）イオンと吸着・酸化反応を繰返し、そ
の結果多量のエチレンが無害化、除去される。In the present invention, attention was paid to the reaction of ethylene in the air in the chamber with monovalent copper ions (hereinafter referred to as copper (I)) to remove them. That is, when air containing ethylene is fed into the copper (I) aqueous solution, ethylene is adsorbed by the copper (I) ions, but in the copper (I) aqueous solution, copper (I) reacts with oxygen to cause oxidation activity. Generates a strong hydroxyl radical (.OH). These radicals react with the adsorbed ethylene and undergo oxidative decomposition. Therefore, ethylene repeats adsorption / oxidation reaction with copper (I) ions, and as a result, a large amount of ethylene is detoxified and removed.
【０００７】また、保鮮庫内の雑菌は上記ラジカルによ
って殺菌されるので、腐敗防止に効果がある。更に、ラ
ジカル生成の際酸素が消費され、庫内の空気の酸素濃度
が低下するので、青果物等の呼吸作用が低下し、老化が
抑制される。加えて、銅（Ｉ）水溶液中に送り込まれた
空気が再び庫内に戻る際、気体状の水分を保持するた
め、青果物等の蒸散が抑制され、乾燥や呼吸作用も低下
して、老化が更に抑制される。[0007] In addition, since various bacteria in the preserving room are sterilized by the radicals, they are effective in preventing spoilage. Furthermore, oxygen is consumed when radicals are generated, and the oxygen concentration of the air in the refrigerator is reduced, so that the respiratory action of fruits and vegetables is reduced, and aging is suppressed. In addition, when the air sent into the copper (I) aqueous solution returns to the inside of the chamber again, it retains a gaseous water content, so that the evaporation of fruits and vegetables is suppressed, and the drying and breathing actions are also reduced, and the aging is reduced. Further suppressed.
【０００８】[0008]
【実施例】図１は本発明の方法を実施する保鮮装置の一
例を示す図である。保鮮庫（１）内にエアコン（２）と
銅（Ｉ）水溶液の液槽（３）と庫内空気を液槽（３）内
に送り込むポンプ（４）とが設置されている。（５）は
調整槽であって、コック（６）より水道水を供給すると
ともに、槽内に銅イオンと還元剤を入れて銅（Ｉ）水溶
液等を調整する。調整された水溶液は、コック（７）を
開くことにより銅（Ｉ）水溶液の液槽（３）内に入る。
保鮮庫（１）内の青果物から発生したエチレンを含む空
気は、ポンプ（４）を通して液槽（３）内でバブリング
される。この時、庫内空気中に含まれる酸素が銅（Ｉ）
イオンと反応して、ヒドロキシルラジカルを発生する。
このヒドロキシラジカルと液槽（３）に送り込まれた空
気に含まれていたエチレンとが反応して分解するととも
に、空気中の雑菌が死滅する。したがって、液槽（３）
から再出する空気は、エチレンが除去され、しかも酸素
濃度が低く、かつ雑菌のいない清浄空気となる。再出す
る空気はまた、気体状の水分を多く保持しているので、
エアコン（２）で冷却されて高湿度が維持される。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing an example of a preserving device for carrying out the method of the present invention. An air conditioner (2), a liquid tank (3) of an aqueous solution of copper (I), and a pump (4) for feeding the air inside the liquid tank (3) are installed in the fresh food storage (1). Reference numeral (5) is an adjustment tank, which supplies tap water from the cock (6) and puts copper ions and a reducing agent into the tank to adjust the copper (I) aqueous solution and the like. The adjusted aqueous solution enters the copper (I) aqueous solution bath (3) by opening the cock (7).
The air containing ethylene generated from the fruits and vegetables in the preserving room (1) is bubbled in the liquid tank (3) through the pump (4). At this time, the oxygen contained in the air in the refrigerator is copper (I).
Reacts with ions to generate hydroxyl radicals.
This hydroxy radical reacts with ethylene contained in the air sent to the liquid tank (3) to decompose, and bacteria in the air die. Therefore, the liquid tank (3)
The air that re-emerges from the air becomes clean air from which ethylene is removed, the oxygen concentration is low, and various bacteria are not present. The re-emitted air also retains a large amount of gaseous moisture, so
High humidity is maintained by cooling with the air conditioner (2).
【０００９】エチレンとヒドロキシルラジカルとが反応
すると、エチレンオキサイド、エタノール、アセトアル
デヒド、酢酸、メタノール、ホルムアルデヒド、ギ酸等
が生成するが、これらはいずれも水に可溶性なので、一
価の銅イオン水溶液に溶解して、保鮮庫（１）内に再出
することはない。これら反応生成物は、さらに液相内で
ヒドロキシルラジカルと反応して酸化分解され、最終的
には二酸化炭素となるから、青果物等には全く無害であ
る。また一価の銅イオンは、水溶液相で徐々に二価のイ
オンとなって活性が低下するが、Ｌ−アスコルビン酸等
の還元剤を加えれば、再び一価のイオンとなり再生する
から、銅（Ｉ）水溶液を頻繁に交換する必要はない。し
かし、保鮮庫（１）内に塵埃が多く混入した場合は、再
生力が低下するから、その場合は排出バルブ（８）を開
いて排出し、新しい銅（Ｉ）水溶液に交換する方が望ま
しい。When ethylene reacts with hydroxyl radicals, ethylene oxide, ethanol, acetaldehyde, acetic acid, methanol, formaldehyde, formic acid, etc. are produced, but since all of these are soluble in water, they can be dissolved in a monovalent copper ion aqueous solution. Therefore, it will not be put out again in the preservation box (1). Since these reaction products further react with hydroxyl radicals in the liquid phase to be oxidatively decomposed and finally become carbon dioxide, they are completely harmless to fruits and vegetables. Further, the monovalent copper ion gradually becomes a divalent ion in the aqueous solution phase and its activity is reduced, but when a reducing agent such as L-ascorbic acid is added, the monovalent copper ion is regenerated as a monovalent ion again. I) It is not necessary to change the aqueous solution frequently. However, if a large amount of dust is mixed in the preserving box (1), the regenerating power is lowered. In that case, it is preferable to open the discharge valve (8) to discharge and replace it with a new copper (I) aqueous solution. ..
【００１０】銅（Ｉ）水溶液の作り方としては、銅
（Ｉ）化合物を溶解または分散させる方法、銅を腐食さ
せる方法、銅（ＩＩ）水溶液を電気や還元剤で還元する
方法等、いずれの方法でもよい。As a method for preparing the copper (I) aqueous solution, any method such as a method of dissolving or dispersing a copper (I) compound, a method of corroding copper, a method of reducing the copper (II) aqueous solution with electricity or a reducing agent, etc. But it's okay.
【００１１】次に本発明方法の効果を確認した試験につ
いて述べる。１２０ｍＬのバイアル瓶に硫酸銅５００ｍ
Ｍ（ｍ mol／Ｌ）と還元剤としてＬ−アスコルビン酸５
００ｍＭを含んだ水溶液１０ｍＬを入れ、これに１％の
エチレン３ｍＬ（瓶内２５０ｐｐｍ）を加えて、１００
ｒｐｍで１分間振盪を行なった後、ヘッドスペースガス
を分析したところ、エチレン濃度は４０ｐｐｍとなって
いた。これにより、銅（Ｉ）水溶液でエチレンを除去で
きることは明らかである。Next, a test for confirming the effect of the method of the present invention will be described. Copper sulfate 500m in 120mL vial
M (m mol / L) and L-ascorbic acid 5 as a reducing agent
Add 10 mL of an aqueous solution containing 00 mM, and add 3 mL of 1% ethylene (250 ppm in the bottle) to 100
When the headspace gas was analyzed after shaking at rpm for 1 minute, the ethylene concentration was 40 ppm. This makes it clear that ethylene can be removed with a copper (I) aqueous solution.
【００１２】銅（Ｉ）がエチレンを吸着することについ
ては、塩化銅（Ｉ）アルミニウム・架橋ポリスチレン系
吸着剤や銅（Ｉ）イオンゼオライト系吸着剤として、平
井他、Ｔ．Ａ．Ｒａｄｏ、Ｙ−Ｙ．Ｈｕａｎｇにより、
それぞれ第３１回高分子討論会Ｇ２Ｇ０４，名古屋（１
９８２）；米国特許第４０１９８７９号（１９７７）；
Ｊ．Ｃａｔａｌｙｓｉｓ ６１，４６１（１９８０）に
記載されている。しかしこれらは、いずれも固体吸着剤
であり、高湿度では低濃度におけるエチレンの吸着容量
が低いので、保鮮庫内に頻繁に入って交換する必要があ
り、実際的でない。本発明方法においては、銅（Ｉ）吸
着剤を銅（Ｉ）イオンを含む水溶液とし、これに庫内の
空気を送り込むことによって、青果物等から発生したエ
チレンを容易かつ低コストで無害化し除去するものであ
る。Regarding the adsorption of ethylene by copper (I), as a copper (I) aluminum / crosslinked polystyrene adsorbent or a copper (I) ion zeolite adsorbent, Hirai et al. A. Rado, YY. By Huang,
The 31st Symposium on Macromolecules G2G04, Nagoya (1
982); U.S. Pat. No. 4,019,879 (1977);
J. Catalysis 61, 461 (1980). However, these are all solid adsorbents, and since the adsorption capacity of ethylene at low concentrations is low at high humidity, it is necessary to frequently enter and exchange them in the preserving cabinet, which is not practical. In the method of the present invention, the copper (I) adsorbent is made into an aqueous solution containing copper (I) ions, and the air in the refrigerator is blown into it to easily and inexpensively detoxify and remove ethylene generated from fruits and vegetables. It is a thing.
【００１３】[0013]
【発明の効果】以上詳しく述べたように、本発明の方法
においてＣｕ（Ｉ）水溶液から再出した空気は、青果物
等の熟成を促すエチレンを含まず、また酸素濃度が低
く、かつ湿度が高く、更に雑菌のない清浄空気となるの
で、青果物等の呼吸抑制、蒸散防止、腐敗防止に好適で
あり、長期にわたって青果物等の鮮度を維持できる。INDUSTRIAL APPLICABILITY As described in detail above, in the method of the present invention, the air re-emitted from the Cu (I) aqueous solution does not contain ethylene which promotes ripening of fruits and vegetables, has a low oxygen concentration and a high humidity. Further, since it becomes clean air free of germs, it is suitable for suppressing respiration of vegetables and fruits, preventing transpiration, and preventing spoilage, and can maintain the freshness of fruits and vegetables for a long time.
【図１】図１は本発明方法を実施する保鮮装置の一例を
示す図である。FIG. 1 is a diagram showing an example of a preserving device for carrying out the method of the present invention.
（１） 保鮮庫 （２） エアコン （３） 銅（Ｉ）水溶液液槽 （４） エアポンプ （５） 調整槽 （６） 水道水バルブ （７） 供給バルブ （８） 排出バルブ (1) Preservation box (2) Air conditioner (3) Copper (I) aqueous solution tank (4) Air pump (5) Adjustment tank (6) Tap water valve (7) Supply valve (8) Discharge valve
Claims (1)
を、一価の銅イオンを含む水溶液中に吹込み、同水溶液
中から再出した空気を上記庫内に戻すことを特徴とする
保鮮方法。1. A preservative characterized in that the air in a container for storing fruits and vegetables is blown into an aqueous solution containing monovalent copper ions, and the air re-emitted from the aqueous solution is returned to the above chamber. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7701992A JPH05276862A (en) | 1992-03-31 | 1992-03-31 | Keeping freshness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7701992A JPH05276862A (en) | 1992-03-31 | 1992-03-31 | Keeping freshness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05276862A true JPH05276862A (en) | 1993-10-26 |
Family
ID=13622051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7701992A Withdrawn JPH05276862A (en) | 1992-03-31 | 1992-03-31 | Keeping freshness |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05276862A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006097634A1 (en) * | 2005-03-18 | 2006-09-21 | Cattani, Carlo, Frederico | Systemic method for proximity hygiene and device with low-temperature sanitizing chamber in particular for food products |
-
1992
- 1992-03-31 JP JP7701992A patent/JPH05276862A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006097634A1 (en) * | 2005-03-18 | 2006-09-21 | Cattani, Carlo, Frederico | Systemic method for proximity hygiene and device with low-temperature sanitizing chamber in particular for food products |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990608 |