WO2006080440A1

WO2006080440A1 - Quality preserver

Info

Publication number: WO2006080440A1
Application number: PCT/JP2006/301320
Authority: WO
Inventors: Yoshihito Saito; Yasuko Kafuku
Original assignee: Freund Corporation
Priority date: 2005-01-28
Filing date: 2006-01-27
Publication date: 2006-08-03
Also published as: JP2008109856A

Abstract

A quality preserver comprising an ethanol vapor generator, an oxygen scavenger of the iron powder type, and an anion exchanger. It prevents the generation of not only the acetaldehyde odor but other odors and maintains the freshness, flavor, and texture of foods. The quality preserver comprises an ethanol vapor generator, an iron powder, an oxidation accelerator, and an anion exchanger, and is characterized in that the amount of sulfur contained in the iron powder is 0-0.1 mass% and that at least the iron powder, oxidation accelerator, and anion exchanger are packed in the same package. The use of the specific iron powder prevents last notes, i.e., heavy smells, besides the acetaldehyde odor.

Description

Specification

Quality retainer

Technical field

[0001] The present invention relates to a quality-preserving agent for foods and the like, and more particularly to a quality-preserving agent that does not impair the freshness, flavor, and texture of foods and the like and reduces the generation of odors.

This application claims priority on January 28, 2005 based on Japanese Patent Application No. 2005-020882 filed in Japan, the contents of which are incorporated herein by reference.

Background art

[0002] Various attempts have been made to store food in a package such as paper or plastic film to maintain the quality of the stored food. For example, a method of removing oxygen from the food package by wrapping an oxygen scavenger with food to prevent acidity of food, and suppressing the generation of harmful microorganisms and molds, as well as ethanol vapor There is known a method for maintaining the flavor, texture, and flexibility of fresh confectionery by packaging the generator with food.

[0003] On the other hand, in order to maintain the quality of food, when trying to obtain the above effects at the same time, when an ethanol vapor generator and an iron powder-based oxygen scavenger coexist, ethanol is oxidized by the oxygen scavenger, Acetaldehyde may be generated and the odor associated with it may significantly reduce the quality of the food. As a solution, Patent Document 1 proposes adsorbing cetaldehyde and suppressing the generation of its odor by coexisting polyallylamine, which is an anion exchanger.

[0004] However, when a package containing food is opened using an ethanol vapor generator and an iron powder-based oxygen scavenger in combination, an odor other than a cetaldehyde odor may be felt. In other words, immediately after opening, the acetaldehyde odor is called the top note, which is a strong stimulus V, odor, which is first felt. V, a feeling after a while after the opening called the so-called “last note” The generated odor may be generated as a heavy scented odor.

Here, the last note derived from the ethanol generating oxygen scavenger will be described. This ethanol-generating oxygen scavenger power There is a rule. Acetaldehyde has a low boiling point and is an irritating odor first felt as a top note after opening the package. The acetaldehyde odor is suppressed by one or more substances selected from solid amino group-containing substances, anion exchangers, and water-soluble cationic polymer having primary amino groups. After opening the packaging bag, the scent of ethanol is then felt, and finally, as a last note, a unique scent generated from the ethanol-generating oxygen scavenger may be felt and may be perceived as an off-flavor. This particular last note is considered to be a substance with a higher boiling point than cetaldehyde and ethanol.

[0005] The odor called "last note" is different from the odor generated from acetoaldehyde, and may be perceived not to be generated when all the quality-preserving agents are used. You may not feel it. This odor cannot be reduced even in the presence of polyallylamine. Removal of heavy and scented odorous components other than this acetaldehyde odor remains unresolved.

Patent Document 1: Japanese Patent Laid-Open No. 62-220178

Disclosure of the invention

Problems to be solved by the invention

[0006] The object of the present invention is to eliminate the above-mentioned problems, and to produce an ethanol vapor generator, an iron powder-based deoxidizing agent, and an anion exchanger (substance exhibiting an ion exchange reaction. Water-soluble polyallylamine is included. Is a quality-preserving agent that suppresses the generation of another type of heavy aroma that is only due to the odor associated with acetoaldehyde, and maintains the freshness, flavor, and texture of foods, etc. .

Means for solving the problem

[0007] A first aspect of the present invention that achieves the above object has an ethanol vapor generator, iron powder containing 0.1% by mass or less of sulfur, an oxidation accelerator, and a solid amino group. In the above-mentioned quality maintenance agent, which is a quality maintenance agent comprising a substance, an anion exchanger, and a water-soluble cationic polymer having a primary amino group, one or more aldehyde adsorbents selected, and a package for packaging the above, The aldehyde adsorbent is preferably a water-soluble cationic polymer having a primary amino group. [0008] In the quality maintaining agent, it is preferable that the ethanol vapor generator is an ethanol-containing powder in which ethanol is contained in a porous powder, and the aldehyde adsorbent is polyallylamine.

[0009] In the quality maintaining agent, the ethanol vapor generator is a sustained-release ethanol-containing powder in which a porous powder contains ethanol, and the aldehyde adsorbent supports polyallylamine on a support. It is preferably a polyallylamine-supported powder

[0010] Further, in the quality maintaining agent, the iron powder, the oxidation accelerator, the aldehyde adsorbent, and the ethanol vapor generator may be packaged in separate packages.

[0011] A second aspect of the present invention includes an ethanol vapor generator, iron powder containing 0.1% by mass or less of sulfur, an oxidation accelerator, a substance having a solid amino group, an anion exchange And a water-soluble cationic polymer having a primary amino group selected from 1 to 2 or more aldehyde adsorbents, and a quality-preserving agent containing the above-mentioned packaging body, together with an object to be stored, enclosed in a packaging bag It is a storage method.

[0012] In the above storage method, the aldehyde adsorbent is preferably a water-soluble cationic polymer having a primary amino group.

[0013] In a third aspect of the present invention, an ethanol-containing powder obtained by adding ethanol to a porous powder, an iron powder containing 0.1% by mass or less of sulfur, an oxidation accelerator, polyallylamine, and A storage method in which a quality-preserving agent including a packaging body for packaging is enclosed in a packaging bag together with a storage object having a water activity of 0.70 or more and 1.0 or less.

Here, “water activity” is expressed as PZP 0, where P is the water vapor pressure of foods at a constant temperature and P 0 is the vapor pressure of pure water at a constant temperature. There are various measurement methods

One method that has been put to practical use is a method in which food or the like is placed in a sealed container and allowed to stand, and the equilibrium relative humidity in the sealed container is measured. At this time, the water activity is 1/100 of the number of the equilibrium relative humidity. For example, if the equilibrium relative humidity is 80%, the water activity value is 0.80.

[0014] A fourth aspect of the present invention is a sustained release ethanol comprising porous powder containing ethanol. A powder containing 0.1% by mass or less of sulfur, an oxidation accelerator, a polyallylamine-supported powder in which a polyallylamine is supported on a support, and a package for packaging the above. This is a preservation method in which the retentive agent is hermetically stored in a packaging bag together with an object to be preserved having a water activity of 0.80 or more and 1.0 or less.

[0015] In the above storage method, the iron powder, the oxidation accelerator, the aldehyde adsorbent, and the ethanol vapor generator may be packaged in separate packages, respectively. Effect

[0016] Alcohol vapor generators, specific iron powders, oxidation accelerators, and aldehyde adsorbents such as aldehyde adsorbents can coexist with foods to improve the freshness, flavor, and texture of foods. Without damaging, it is possible to suppress the generation of odor of acetoaldehyde and odor of heavy scent different from this. In other words, it was found that the sulfur component contained in iron powder was related to the smell of heavy scent, and by using iron powder with a sulfur content of 0 to 0.1% by mass, the smell of heavy scent was reduced. Occurrence can be prevented.

[0017] The quality-preserving agent of the present invention effectively adsorbs cetaldehyde by containing at least an aldehyde adsorbent such as an iron powder, an oxidation accelerator, and an anion exchanger in the same package. It is possible to effectively prevent the generation of odor associated with the acetaldehyde.

BEST MODE FOR CARRYING OUT THE INVENTION

[0018] Hereinafter, preferred embodiments of the present invention will be described in detail.

[0019] The quality-preserving agent of the present invention is an ethanol vapor generator, iron powder, an oxidation accelerator, and a polyarylamine-powering quality-preserving agent, and the sulfur contained in the iron powder is 0 to 0.1% by mass. is there

[0020] The ethanol vapor generator used in the quality-preserving agent of the present invention is preferably one in which ethanol or an aqueous ethanol solution is adsorbed or absorbed in a porous material such as silica gel, zeolite or activated carbon. The use of a porous material as the base material for the ethanol vapor generator is preferable because the particle properties do not become sticky even when the amount of ethanol adsorbed is large.

Examples of the acid promoter used in the present invention include alkali or alkaline earth gold A genus hydroxide or chloride, or a product in which this is supported on a porous granular material such as zeolite or activated carbon is used. Alkaline or alkaline earth metal salts are most preferred. The composition of the present invention preferably contains water, but when water is contained, it may be contained in the component before mixing, or may be added after mixing. A mixture of water adsorbed on other adsorbents may be mixed, or an alkali or alkaline earth metal salt solution supported on an adsorbent as an aqueous solution may be used as is, or If the supported adsorbent is once dried and stored, water may be added before or after mixing with the metal powder. Further, in the case of foods containing a large amount of water, the object can be achieved by water vapor derived from the water contained in the food, etc., without adding water to the composition. That is, since water only needs to coexist when the composition of the present invention combines with oxygen and exerts the effect of removing oxygen from the system, water is present in the composition of the present invention. You don't have to.

[0021] In the quality-preserving agent of the present invention, the blending amount of the ethanol vapor generator is preferably 10 to 89% by mass, more preferably 39 to 59% by mass, based on 100% by mass of the entire net quality-preserving agent. . If the amount of ethanol vapor generator is less than the above range, the amount of ethanol vapor generated will be insufficient and it will be difficult to obtain a sufficient effect. The iron powder becomes segregated and is preferable! / ヽ.

In the ethanol vapor generator of the present invention, the adsorption amount of ethanol or an ethanol aqueous solution is preferably 0.1 to 5 gZg, more preferably 0.5 to 2.5 gZg, per unit weight of the porous body. . If the amount of ethanol adsorbed is less than the above range, the porous powder adsorbed with ethanol becomes bulky and difficult to handle, and if it exceeds the above range, the ethanol force tends to be crushed and the powder fluidity tends to decrease. Is not preferable.

[0023] The ethanol concentration of the ethanol aqueous solution is preferably 20% by mass or more, and more preferably 40 to 99.5% by mass. If the ethanol concentration is less than the above range, the amount of ethanol generated is insufficient, and it is difficult to obtain a sufficient effect.

[0024] In the present invention, the iron powder is oxidized by an oxidation accelerator, thereby adsorbing and removing oxygen in the atmosphere and functioning as an oxygen scavenger. Compared with other metal powders, iron powder and oxygen It can be used effectively as an oxygen scavenger because it has a high reaction rate and can control the reaction rate by adjusting the oxidation accelerator.

[0025] The iron powder used in the quality-preserving agent of the present invention is preferably reduced iron powder, electrolytic iron powder, atomized iron powder or the like. In the present invention, the particle size of the iron powder is preferably 250 m or less, more preferably 200 / z m or less, and still more preferably 20 to 15 O / z m. If the particle size of the iron powder exceeds the above range, the specific surface area tends to decrease and the reactivity tends to decrease, or the iron powder tends to segregate in the mixed powder of the quality-preserving agent, which is not preferable. Such iron powder may contain various kinds of impurities other than sulfur, which need not be pure.

[0026] In the present invention, the amount of the iron powder is preferably 10 to 89% by mass, more preferably 40 to 60% by mass, based on 100% by mass of the entire net quality-preserving agent. If the blending amount of the iron powder is less than the above range, the deoxygenation ability tends to be low, or the iron powder tends to segregate in the mixed powder of the quality-preserving agent. This is not preferable because the amount of this compound is reduced and a sufficient effect cannot be obtained.

[0027] As a result of various searches by the present inventors for the cause of generating a heavy odor as a last note, the present inventors have found that it is sulfur contained in iron powder as an oxygen scavenger. That is, the iron powder used in the quality-preserving agent of the present invention has a sulfur content of 0 to 0.1% by mass, preferably 0 to 0.05% by mass, more preferably 0 to 0.03% by mass. %. If the amount of sulfur contained in the iron powder exceeds the above range, a heavy scented odor may be generated as a last note when the package containing stored food is opened. A heavy scented odor may be perceived as an off-flavor and may reduce the taste, texture and appetite of the food. The mechanism of heavy scent generation is unknown, but odor generation can be prevented by reducing the sulfur content in the iron powder. It should be noted that it is impractical to completely remove the sulfur content in the iron powder, since the iron powder is expensive and unrealistic, and if there is no substantial heavy scent, a small amount of sulfur may remain.

In the present invention, the sulfur content contained in the iron powder is measured by JIS G121-5 “Method for determining sulfur in iron and steel”.

[0029] The iron powder used in the quality-preserving agent of the present invention can be appropriately selected from commercially available iron powders. For example, as atomized iron powder, Atmel pure iron powder manufactured by Kobe Steel, As the reduced iron powder, iron powder such as RDH and RS manufactured by Powdertech Co., Ltd. can be used. However, even with atomized iron powder, free-cutting steel powder cannot be used because of its high sulfur content.

In the present invention, the oxidation accelerator acts on the iron powder to effectively oxidize the iron powder and function as a deoxidizer that adsorbs oxygen in the atmosphere.

[0031] As the oxidation promoter used in the quality-preserving agent of the present invention, alkali metal, alkaline earth metal, or transition metal halides can be used. Specifically, the oxidation accelerator is preferably a salt salt such as sodium chloride, potassium salt, lithium chloride, salt calcium, salt magnesium, iron chloride, tin chloride, salt manganese. More preferably, it is sodium chloride, potassium chloride, or magnesium chloride, and it is particularly preferred that the handleability and price power are also sodium chloride! / ,.

[0032] In the quality-preserving agent of the present invention, the blending amount of the oxidation accelerator is preferably 0.01 to 0.3% by mass, more preferably 0.05, based on 100% by mass of the entire net quality-preserving agent. -0. 1 Mass%. If the blending amount of the oxidation accelerator is less than the above range, the deoxygenation reaction in the iron powder may not be sufficiently promoted, and if it exceeds the above range, the deoxygenation reaction may be adversely inhibited. Absent.

[0033] In order for iron powder to react with oxygen in the atmosphere, moisture is required together with the oxidation accelerator, and it does not react in an anhydrous state. However, when there is moisture in the use atmosphere, such as when the food contains moisture, the iron powder will oxidize sufficiently, so there is no need to add moisture. On the other hand, when storing foods that do not contain moisture, such as fats and oils, and that are easily altered by oxidation, if it is necessary to quickly deoxygenate the storage atmosphere, moisture should be added to the oxygen scavenger or ethanol generator. Moisture-absorbing porous materials such as clay, silica, alumina, activated carbon, zeolite and activated carbon may be added.

[0034] In the present invention, the water-soluble cationic polymer having a primary amino group such as an anion exchanger adsorbs the acetaldehyde generated by the acidification of ethanol in the food packaging body, thereby It prevents the generation of odor associated with food and maintains the quality of food. As the anion exchanger, various ion exchangers such as strong basic, weak basic, and amphoteric can be used, but strong and weak basic ion exchangers are preferable. is there. Specifically, preferred examples of the anion exchanger used in the present invention include anion-exchanged resin, chitosan, and polyethyleneimine. In addition, polyallylamine as an aldehyde adsorbent is more preferable because of its high aldehyde adsorption capacity.

In the present invention, an aldehyde adsorbent such as an anion exchanger is obtained by adsorbing an anion exchanger on a porous body such as silica gel, silica, alumina, activated carbon, zeolite, activated carbon or the like. However, segregation can be prevented in the mixed powder of the quality-preserving agent, and the acetonitrile can be adsorbed more effectively.

[0036] In the quality-preserving agent of the present invention, the blending amount of an aldehyde adsorbent such as an anion exchanger is preferably 0.05 to: LO mass%, more preferably 100% by mass of the entire net quality-maintaining agent. Is 0.1-5% by mass. If the amount of the anion exchanger is less than the above range, the acetaldehyde may not be adsorbed, and if it exceeds the above range, the amount will be excessive, leading to an increase in cost and volume of the quality-preserving agent. Also, it is not preferable because it may inhibit the deoxygenation reaction.

[0037] It should be noted that, as an aldehyde adsorbent such as an anion exchanger, a porous material such as silica gel, silica, alumina, activated carbon, zeolite, activated carbon or the like adsorbed an anion exchanger may be used. The blending amount is preferably within the above range.

[0038] Furthermore, the blending amount of aldehyde adsorbent such as anion exchanger with respect to ethanol is preferably 0.3 parts by weight or more, more preferably 0.5 to more than 100 parts by weight of ethanol. 3 parts by weight. If the amount of the anion exchanger is less than the above range, it is not preferable because the cetaldehyde may be completely absorbed or the adsorption may be slow.

[0039] The form of the quality-preserving agent of the present invention is to contain an aldehyde adsorbent such as iron powder, an oxidation accelerator, and an anion exchanger in the same package.

[0040] In the present invention, the aldehyde adsorbent such as an anion exchanger mainly absorbs acetaldehyde generated by acidification of ethanol vapor generated by evaporation of ethanol vapor. Prevents the generation of aldehyde odor and maintains food quality. Therefore, aldehyde adsorbents such as anion exchangers are more suitable for iron powder and oxidation promotion than aldehyde adsorbents such as anion exchangers that are preferably housed near the source of acetaldehyde. It is preferable to accommodate the oxygen scavenger component comprising the agent in the same package. When an aldehyde adsorbent such as an anion exchanger is accommodated in a separate package from the oxygen scavenger component, the efficiency of removing the acetoaldehyde may be reduced, which is preferable.

[0041] In addition, a package having an aldehyde adsorbent power such as an oxygen absorber component and an anion exchanger, and a package containing an ethanol generator are separately disposed. You can also. In this case, the package containing the aldehyde adsorbent such as the oxygen scavenger component and the anion exchanger has high permeability of oxygen and water vapor, low permeability of ethanol vapor, or ethanol vapor. It is preferable that the package does not pass through. By doing so, contact between ethanol vapor and oxygen scavenger can be suppressed, and generation of cetaldehyde can be expected.

[0042] As a preferred form of the quality-preserving agent in the present invention, an oxygen scavenger component consisting of iron powder and an oxidation accelerator, an aldehyde adsorbent such as an ethanol generator, and an anion exchanger are contained in the same package. It can also be accommodated.

[0043] The quality-preserving agent of the present invention is preferably attached in an amount of 1 to 3 g, more preferably 1.5 to 2.5 g as the amount of iron powder per 1000 ml of air amount of the food package. If the attached amount of the quality-preserving agent is less than the above range, the food packaging body may not be able to fully absorb oxygen. It is not preferable because it grows.

[0044] The quality-preserving agent of the present invention is preferably used for processed foods such as Western confectionery, Japanese confectionery, Chinese confectionery, bread, cakes, rice cakes, potatoes, delicacies, side dishes, dried fruits, or foods such as cereals. be able to.

[0045] The quality, flavor, and texture of the food can be improved by coexisting with the food a quality-preserving agent comprising an aldehyde adsorbent such as an ethanol vapor generator, specific iron powder, an oxidation accelerator, and an anion exchanger. It is possible to suppress the generation of acetaldehyde odor and a different heavy scent odor. Furthermore, by containing the iron powder, the oxidation accelerator, and the anion exchanger in the same package, it is possible to effectively adsorb the acetonitrile and prevent the generation of odor associated with the acetonitrile.

As used herein, the “water activity of food” is measured by the Conway unit method, It can be measured with a water activity measuring instrument manufactured by To Sangyo Co., Ltd., trade name EZ-100. When measuring the water activity of foods, it is common to sample outside and inside the food. In this case, the water activity corresponds to “total water activity of food”. As will be described later, in pastry and the like, the water activity may be greatly different between the castella portion and the cream portion. Therefore, if necessary, the sampling location is changed from a portion of the food, and multiple water activities are measured. Two water activities were measured in the following confectionery: 0.70 and 0.90. These water activities correspond to “the water activity of a part of the food”.

[0046] Examples of the measurement results of the water activity of the food are as follows.

Western confectionery (whole) 0. 70

Sweet food 0. 73

Anne in the middle 0. 77

Noom Kuchen 0. 80

Ningyo-yaki 0. 88

Western confectionery (cream part) 0. 90

Castella, fermented sausage 0. 91

Process cheese 0.93

Bread 0.95

Pickled pepper 0. 95

Steamed rice cake 0.95

Cut rice cake 0.99

Hereinafter, the present invention will be explained by examples, but the present invention is not limited to these examples. Example

[0047] Raw materials used in Examples and Comparative Examples are as follows.

• Iron powder (1): Atomized iron powder with a sulfur content of 0.02 mass% and a particle size of 150 / zm or less (Pure iron powder 270M manufactured by Kobe Steel, Ltd. The sulfur content was measured by the method described above. • Iron powder (2): Atomized powder with a sulfur content of 0.3% by mass and a particle size of 180 m or less (Free-cutting steel powder 400MS—A manufactured by Kobe Steel, Ltd. The sulfur content was measured by the method described above. • Silica Genole: Average particle size 1 50 m (Freund Sangyo) • Polyallylamine adsorbed powder: Powder with 15% by mass of polyallylamine adsorbed on the surface of silica gel (Nittobo)

The following materials were used as quality maintenance materials and food packaging materials.

'Quality-holding material sachet: Perforated polyethylene terephthalate Z polyethylene Z paper Film packaging material composed of Z perforated polyethylene was molded into a 30 × 40 mm sachet by heat sealing.

• Food packaging bags: Sealable, commercially available amorphous nylon Z polyethylene bags (air volume 150 ml)

In addition, a constant temperature salt (water activity value of 0.84 / 25 ° C) obtained by making salty potassium lOOg into a sherbet with 30 g of water was used in place of the food containing water.

[0048] The sensory test of odor generated in the food packaging bag and the acetonitrile concentration were evaluated as follows.

• Odor sensory test: A blind odor sensory test was conducted by five volunteers. • Cecetaldehyde concentration: The gas in the food packaging bag before opening was sampled, and the acetoaldehyde concentration was measured using a gas-mouth matrix.

50 parts by weight of iron powder (1) was mixed with 5 parts by weight of sodium chloride as an oxidation accelerator. Next, a powder in which 25 parts by weight of an aqueous ethanol solution having an ethanol concentration of 92% by mass and 2 parts by weight of a polyallylamine adsorbed powder was added to 18 parts by weight of silica gel and mixed with the iron powder.

[0050] 0.75 g of the mixed powder was filled in a quality-preserving material sachet and sealed by heat sealing to obtain a quality-preserving agent having ethanol vapor generation and deoxygenation functions.

[0051] A food packaging bag was filled with the obtained quality-preserving agent and 10 g of constant temperature salt, sealed, and stored at 25 ° C for 2 days. After that, the concentration of acetoaldehyde in the food packaging bag was measured, and the food packaging bag was opened, and an odor sensory test was conducted. The results are shown in Table 1.

[0052] As a result, the food packaging bag was strong enough to feel no off-flavor in addition to ethanol.

[0053] [Table 1] Test zone Heavy scent Acetaldehyde

Odor odor [p m]

Example I can't feel I can't feel 5 p p m

1

Example I don't feel I don't feel 1 Pm or less

2

Comparative example Cannot be felt as a last note 1 0 p p m

1 feels strange

Comparative example Last note not felt 6 p p m

2 I feel a strange odor

Comparative example Cannot be felt as a pungent odor 1 2 0 p p m 3

Sensory test number of people: 5

50 parts by weight of iron powder (1) was mixed with 5 parts by weight of sodium chloride and 2 parts of polyallylamine adsorbed powder as an oxidation accelerator to obtain a mixed powder (A) as an oxygen scavenger composition. Next, 18 parts by weight of Siri force gel was mixed with 25 parts by weight of an aqueous ethanol solution having an ethanol concentration of 95% by mass to obtain a mixed powder (B) as an ethanol vapor generator composition.

[0055] 4.3 g of the mixed powder (A) of the oxygen scavenger composition was filled in a quality maintenance material sachet and sealed with a heat seal to obtain an oxygen scavenger (A). Similarly, 3.2 g of the mixed powder (B) of the ethanol vapor generator composition was filled in another quality-preserving material sachet and sealed by heat sealing to obtain an ethanol vapor generator (B).

[0056] In a food packaging bag, an oxygen scavenger (A), an ethanol vapor generator (B), and 10 g of a constant humidity salt were sealed and stored at 25 ° C for 2 days. Thereafter, the concentration of cetaldehyde in the food packaging bag was measured, and the food packaging bag was opened to conduct an odor sensory test. The results are shown in Table 1.

As a result, the off-flavor was not felt in addition to ethanol.

[0057] <Comparative Example 1>

A quality retainer was prepared in the same manner as in Example 1 except that iron powder (2) was used instead of iron powder (1). The sensory test was conducted. The results are shown in Table 1.

[0058] As a result of the sensory test, the acetaldehyde felt a powerful force that was not felt as a last note.

[0059] <Comparative Example 2>

An oxygen scavenger and an ethanol vapor generator were prepared in the same manner as in Example 2 except that iron powder (2) was used instead of iron powder (1), and a sensory test was performed. The results are shown in Table 1.

[0060] As a result of the sensory test, the acetaldehyde felt a powerful force that was not felt.

[0061] <Comparative Example 3>

50 parts by weight of iron powder (1) was blended with 5 parts by weight of sodium chloride as an oxidation accelerator to obtain a mixed powder (C) as an oxygen scavenger composition. Next, 18 parts by weight of silica gel and 25 parts by weight of an ethanol aqueous solution having an ethanol concentration of 95% by mass and 2 parts by weight of polyallylamine adsorbed powder were blended to obtain a mixed powder (D) as an ethanol vapor generator composition.

[0062] The mixed powder (C) of the oxygen scavenger composition (4.3 g) was filled in a quality maintenance material sachet and sealed with a heat seal to obtain an oxygen scavenger (C). Similarly, 3.2 g of the mixed powder (D) of the ethanol vapor generator composition was filled into another quality-preserving material sachet and sealed by heat sealing to obtain an ethanol vapor generator (D).

[0063] In a food packaging bag, an oxygen scavenger (C), an ethanol vapor generator (D), and 10 g of constant temperature salt were sealed and stored at 25 ° C for 2 days. Then, the concentration of cetaldehyde in the food packaging bag was measured, and the food packaging bag was opened and the odor sensory test was performed.

. The results are shown in Table 1.

[0064] As a result of the sensory test, acetaldehyde was generated and a characteristic irritating odor was felt. On the other hand, the heavy smell of the last note as felt in Comparative Examples 1 and 2 was not felt o

Industrial applicability

[0065] The present invention does not impair the freshness, flavor, and texture of foods and the like, can reduce the generation of odors, and can be applied to maintaining the quality of foods and the like.

Claims

The scope of the claims

[1] an ethanol vapor generator;

0. Iron powder containing 1% by mass or less of sulfur,

An oxidation promoter,

A substance having a solid amino group, an anion exchanger, and a water-soluble cationic polymer having a primary amino group, and one or more aldehyde adsorbents selected,

A package for packaging the above and

Including quality preservation agents.

[2] The quality maintaining agent according to claim 1, wherein the aldehyde adsorbent is a water-soluble cationic polymer having a primary amino group.

[3] The quality-preserving agent according to claim 1, wherein the ethanol vapor generator is an ethanol-containing powder in which ethanol is contained in a porous powder, and the aldehyde adsorbent is polyallylamine.

[4] The ethanol vapor generator is a sustained-release ethanol-containing powder in which ethanol is contained in a porous powder, and the aldehyde adsorbent is a polyallylamine-supported powder in which a polyallylamine is supported on a support. Item 1. The quality-preserving agent according to Item 1.

[5] The quality maintenance agent according to claim 1, wherein the iron powder, the oxidation accelerator, the aldehyde adsorbent, and the ethanol vapor generator are packaged in separate packages.

[6] Ethanol vapor generator, iron powder containing 0.1% by mass or less of sulfur, oxidation accelerator, substance having a solid amino group, anion exchanger, and water-soluble having a primary amino group A storage method in which a quality-preserving agent containing 1 or 2 or more aldehyde adsorbents and a package that wraps the above is sealed in a packaging bag together with an object to be stored.

[7] The storage method according to claim 6, wherein the aldehyde adsorbent is a water-soluble cationic polymer having a primary amino group.

[8] Quality comprising ethanol-containing powder in which ethanol is contained in porous powder, iron powder containing 0.1% by mass or less of sulfur, oxidation accelerator, polyallylamine, and a package for packaging the above Pack the preservative with the preservation object with water activity of 0.70 or more and 1.0 or less Preservation method to be sealed in a bag.

[9] A sustained release ethanol-containing powder in which ethanol is contained in a porous powder, an iron powder containing 0.1% by mass or less of sulfur, an oxidation accelerator, and a polyallylamine supported on a support. A storage method in which a quality-preserving agent comprising allylamine-supported powder and a package for packaging the above is hermetically stored in a packaging bag together with a storage object having a water activity of 0.80 or more and 1.0 or less.

[10] The iron powder, the oxidation accelerator, the aldehyde adsorbent, and the ethanol vapor generator are packaged in separate packages, respectively. Preservation method.