JP3107399B2 - Method for producing disinfecting solution, disinfecting solution and disinfecting medium - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a disinfecting solution having a disinfecting effect by copper ions and a method for producing the same.

BACKGROUND ART Conventionally, as a disinfectant, chlorine-based, neutral soap, inverse soap, cresol soap, formalin solution, alcohol solution, and the like have been often used. However, very few have strong sterilizing ability and are said to be safe for the human body. For example, when chlorine-based germicides are not limited to foods and target organic substances, the chlorine-based germicides react with the organic substances very quickly, and the bactericidal performance due to chlorine is reduced to near zero. Alcohol-based germicides hardly have a bactericidal effect because water adheres to an object or is diluted for a substance having a large amount of water and the alcohol concentration is reduced. Furthermore, alcohol-based germicides are unsuitable for foods and the like because of their unique odor. In addition, chlorine-based and alcohol-based bactericides are used for long-term transpiration, so that they are persistent.

Therefore, in the present invention, ozone sterilization harmful to the human body for sterilization, chlorine sterilization, or without using a benzol derivative product whose use is prohibited for the human body,
By using copper ions that are considered to be harmless even when accumulated medically, it is harmless to the human body, has a high bactericidal effect, sustains a bactericidal effect, and can be used easily. It is intended to provide. Further, the present invention also provides a disinfecting solution having a quick disinfecting effect and a deodorizing effect in addition to a persistent disinfecting effect, a method for producing the same, and a disinfecting medium using the disinfecting solution. It is the object of the invention.

DISCLOSURE OF THE INVENTION Therefore, in the present invention, there is provided a disinfecting solution that maximizes the bactericidal effect of copper ions by using a process of mixing powdered pure copper with an aqueous solution of water or an organic acid. The liquid containing copper ions can also be generated by using a copper compound such as copper sulfate or copper chloride. However, in the aqueous solution in which these copper compounds are dissolved, a sulfate group is present in copper sulfate together with copper ions, and in the aqueous solution in which copper chloride is dissolved, chloride ions are present. Therefore, the activity of copper ions is low, and it is difficult to effectively utilize the ability of a small amount of copper ions to inhibit the growth of microorganisms. On the other hand, by mixing pure copper with water or an aqueous solution of an organic acid, that is, in the sanitizing solution of the present invention containing pure copper ions obtained by dissolving pure copper in water or an organic acid, a sulfate group or the like is used. Since there is no influence of the copper ion, the ion activity of metallic copper can be several tens times higher than that of the copper compound, so that the bactericidal effect of copper ions can be maximized. As organic acids, tartaric acid, citric acid, ascorbic acid, lactic acid, malic acid and fumaric acid, which are safe for the human body, are preferably employed, and furthermore, tartaric acid among these vegetable organic acids is preferred. The effect of preventing the formation of basic copper carbonate or the like by mixing is improved.

Furthermore, since the disinfecting solution produced by the production method of the present invention is liquid, it can be easily used by various methods such as wiping, applying, or spraying the disinfecting solution on a portion to be sterilized. It is. In addition, since the sterilization effect can be maintained by the presence of copper ions even in a place wet with water or a substance having a large amount of water, it can be applied to any place. Furthermore, since the disinfecting solution of the present invention contains pure copper ions eluted from copper ions from metal copper, after water evaporates, copper metal remains on the surface instead of a copper compound salt,
Sterilization effect can be maintained. Therefore, the disinfecting solution produced by the production method of the present invention can exhibit and maintain excellent disinfecting properties.

In the production method of the present invention, in order to improve the elution efficiency of copper ions from metallic copper, a powdered state, preferably pure copper in a fine powder state is used, and a disinfecting solution in which about 0.1 ppm to about 50 ppm of copper ions have been eluted. Can be produced, and a sufficient bactericidal effect can be exhibited. Further, in the mixing step, it is desirable to stir the solution mixed with the powdered copper in order to shorten the elution time. In addition, electrolytic copper can be used as pure copper.

In particular, a disinfecting solution characterized by being mainly composed of an aqueous solution of an organic acid containing pure copper ions, a strong and quick sterilizing power by an acid solution, and a proliferating power of persistent bacteria by copper ions, Furthermore, it exhibits high deodorizing power and freshness holding power. By using the organic acid, the pH can be out of the environmental range suitable for the growth of bacteria, and the bacteria can be killed by itself when the pH is significantly lower than the environmental conditions suitable for the growth of bacteria. Furthermore, when the pH decreases and approaches the isoelectric point, the surface charge on the cell membrane of each bacterium decreases, and the bacterium dies because the physiological function of the cell membrane cannot be continued.
In addition, the presence of copper ions reduces the surface charge of the bacteria, so that they act synergistically, causing the bacteria to aggregate and sediment. Furthermore, copper ions have the effect of electrostatically acting on the cell membrane of bacteria and inhibiting the metabolism of bacteria by water, which is a factor leading to the continuation of the sterilization performance. Therefore, it is possible to disinfect the bacteria and prevent the propagation of the bacteria by these actions, and by using the disinfecting solution of the present invention, it is possible to obtain a bactericidal effect in which the proliferating form is released and the bacteria are killed even in a non-closed system. .

Conventional alcoholic disinfectants lose their effect when they evaporate, and chlorine-based disinfectants such as sodium hypochlorite reduce the free chlorine rapidly due to the buffering or absorbing action of organic substances, resulting in a disinfecting effect. It will decrease significantly. In contrast, the eradication solution of the present invention is low due to organic acids.
The action of pH kills the bacteria in a short time and reduces the number of bacteria, and the bactericidal effect can be maintained for a long time by copper ions. And since a pure copper ion is used, a bactericidal effect is maintained and a bactericidal effect can be obtained even after the sterilizing solution is dried. Therefore, the disinfecting solution of the present invention can exert its effects in both a wet environment and a dry environment.

As an organic acid, it is recognized as a food additive,
It is possible to use at least one of the group of vegetable organic acids consisting of tartaric acid, citric acid, ascorbic acid, lactic acid, malic acid or fumaric acid. Harmless to
A very strong disinfecting solution can be provided. Since L-tartaric acid is highly reducing, it is difficult to form a salt such as basic cupric acid from copper ions. It has high deodorizing power, quickly removes ammonia, trimethylamine (TMA), acetaldehyde, etc., and has excellent freshness retention ability.

Furthermore, the aqueous solution of an organic acid when eluting ions from metallic copper can increase the concentration of copper ions in a short time by adjusting the PH to about 0.8 to about 3.5, and after the copper ions are eluted, It can be diluted to pH.
In order to further increase the concentration of copper ions in a shorter time, it is possible to dissolve a strong electrolyte in water or an aqueous solution. Salt can be used as a strong electrolyte harmless to the human body. When an aqueous solution having a high concentration of copper ions can be obtained, it is possible to provide them by arbitrarily diluting them to 1/5 or 1/100 or the like according to the purpose of use.

Further, since the disinfecting solution of the present invention is in a convenient form of an aqueous solution, it can be used as a liquid or in various ways such as spraying, and can be further immersed in a medium such as gauze or tissue. It can also be provided as a medium for disinfection in various forms such as a disinfecting sheet or a freshness maintaining sheet by a method such as coating.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flowchart showing an example of a process for producing a sterilizing solution of the present invention.

FIG. 2 is a table summarizing the first experimental results of the disinfecting solution of the present invention.

 FIG. 3 is a graph summarizing the table shown in FIG.

FIG. 4 is a table summarizing the results of the second experiment of the sanitizing solution of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION FIG. 1 is a flowchart showing a process for producing a sterilizing solution according to the present invention. First, in step 11, fine powder copper is mixed into an aqueous solution whose pH is controlled using an organic acid. The organic acid is selected singly or in combination from vegetable organic acids such as L-tartaric acid, citric acid, ascorbic acid, lactic acid, malic acid and fumaric acid. These organic acids are not restricted by the use standard among the food additives of the Ministry of Health, Labor and Welfare Ordinance No. 36 amendment in 1983, and have high acidity and can be used at a low price. When tartaric acid is used, the pH of a 5% aqueous solution at room temperature is about 1.68, and when citric acid is used, the pH of a 5% aqueous solution at room temperature is about 1.68.
1.87. To these aqueous solutions, for example, electrolytic copper (electrolytic high-purity copper (purity 99.9
%))). In the production method of the present invention, copper ions (pure copper ions) are eluted from metallic copper in order to obtain pure copper ions, so that the copper ion concentration is hardly increased. Therefore, it is desirable to use powdered copper having a large surface area.

The mixed solution of the aqueous solution of metallic copper and the organic acid thus obtained is stirred in step 12 using an agitator or the like. When an aqueous solution of an organic acid having the above pH and electrolytic copper in a fine powder state are used, a solution in which copper ions having a concentration of about 100 ppm are eluted can be obtained by continuously stirring for about 24 hours. Unlike the copper ions obtained by dissolving the copper compound, the copper ions obtained in this process do not contain sulfate groups and chloride ions to be bound, and are highly active copper ions (pure copper ions). Therefore, it is difficult to effectively utilize the inhibitory effect on the reproduction of microorganisms. In contrast, by mixing pure copper with water or an aqueous solution of an organic acid,
In the disinfecting solution of the present invention having pure copper ions obtained by dissolving pure copper in water or an organic acid, the ionic activity of metallic copper is several tens times higher than that of a copper compound because there is no influence of a sulfate group or the like. it can. Therefore, the bactericidal effect of the copper ions can be maximized. Furthermore, when the liquid is dried, metallic copper will be deposited instead of a copper compound,
A bactericidal effect can be obtained even in a dry state.

After the solution in which the pure copper ions are dissolved is filtered in step 13 to remove electrolytic copper in the solution, the solution is further diluted to an appropriate concentration in step 14 to provide a sterilized solution. For example, when an aqueous solution of the above-described organic acid is used, a solution having a pH of about 2.6 or less, preferably about 2.0 to 2.3 is obtained by diluting about 20 times in step 14, and killing Gram-negative bacteria. A germicidal solution suitable for the germ removal can be produced.

Further, in the above production process, by using an organic acid such as tartaric acid, ascorbic acid, malic acid, fumaric acid, etc., it is possible to improve the sterilization performance by the synergistic effect with copper ions and to add deodorant performance. For this reason, it is desirable to produce a disinfecting solution using an aqueous solution of an organic acid such as a vegetable organic acid such as tartaric acid.

It goes without saying that the hydrogen ion concentration of the aqueous solution of the organic acid is not limited to the above, and a disinfecting solution having the same performance can be produced by mixing fine powdered electrolytic copper into an aqueous solution having a low pH and stirring. It is possible. in this case,
It is necessary to extend the stirring time to obtain an appropriate amount of copper ion concentration. In addition, a fine powdered electrolytic copper is mixed with water containing no organic acid, such as distilled water, and further agitated for a long time to produce a disinfecting solution having a bactericidal effect due to copper ions eluted from metallic copper. be able to.
Although the copper ion concentration shows sufficient bactericidal activity even at about 0.05 ppm, it depends on the amount of organic matter mixed, so
It is desirable to set it to about pm or more because a sufficient bactericidal effect is recognized. Of course, as described above, a bactericidal effect is observed even at a concentration of about 0.1 ppm or less. In addition, the disinfecting solution produced by eluting copper ions from metallic copper according to the production method of the present invention has a high activity of copper ions and is so high in consideration of the elution time of copper ions from metallic copper. A concentration solution is unnecessary, and the upper limit of the copper ion concentration is about 30 to 50 ppm. Therefore, a commercially available disinfectant containing copper ions of about 1 to 10 ppm is effective. A sterilizing solution containing copper ions of about 5 to 8 ppm, which provides stable sterilizing power and does not increase the copper ion concentration as waste liquid so much, is more desirable for commercial use.

Further, in step 11 or 12, by adding a strong electrolyte such as salt to water or an aqueous solution, the copper ion concentration can be increased in a short time, and the stirring time can be shortened. It is desirable to select a salt harmless to the human body in the strong electrolyte. In addition, since the organic acid used is one recognized as a food additive as described above, it is possible to produce a disinfecting solution that is completely harmless to the human body and has strong sterilization performance. Furthermore, since a plant organic acid is used, even a low pH has little effect on the human body.

In general, the range of pH at which bacteria can grow is wide, from pH 4.0 to 10.0.
Between. However, most pathogens have a pH of 5.0
Although there is a growth range at 9.0, the optimum pH range is 7.0 to 7.6, and metabolic activity is highest and smooth in this range. A group that gives a positive charge and a group that gives a negative charge when dissociated are present on the bacterial surface in a disturbed manner, but as a whole, the result of subtraction calculation of the dissociating groups at the pH is the shape of the bacterial surface charge. Appears in. It is considered that the largest element participating in this bacterial surface group is a dissociated residue of an amino acid constituting a protein.

Generally, the dissociation state of a neutral amino acid is as follows. At the intermediate point, both groups are dissociated, but at pH 4.5 or lower, the result is as shown in (1) below, and at pH 9.5 or higher, as in (2). _{^{+ H 3 N-R-COO}} - + H + ⇔ + H 3 N-R-COOH ··· (1) + H 3 N-R-COO - + OH - ⇔ + H 3 N-R-COO - + H 2 O (2) In a protein composed of variously mixed acidic amino acids and basic amino acids, the carboxyl group and the amino group are also mixed in the residues, and the dissociation of each is determined by the pH.
Furthermore, the surface charge of bacteria is constituted by the addition of the dissociation group of teichoic acid and polysaccharide.

Isoelectric point at which bacterial cell membrane charge becomes zero (ISOELECT POI
NT), and pH1 for Gram-positive bacteria (such as Staphylococcus, Micrococcus, Streptococcus, and Peptococcus).
5 to 2.9, and Gram-negative bacteria (Neisseria, Moraxella, Acinetobacter, Bayonella, Pseudomonas, Alcaligenes, Brucella, Bordetella, Francisera, Enterobacteriaceae, Shigella, Salmonella, Escherichia coli (Genus, Klebsiella, Proteus, Elwisinia, Yersinia, Vibrioceae, Haemophilus, Pasillus, Clostridium, Corynebacterium, etc.), the pH is slightly different from 2.5 to 4.0.

The bacterial suspension in which these bacteria float and perform metabolic activity exists as an equal suspension on the balance between the cohesion between particles and the repulsion due to charge. However, if the pH drops to near the isoelectric point or if the charge decreases due to heavy metals such as copper, the bacteria will aggregate and precipitate. Therefore, even in the state of the non-closed system, the breeding form is released and the animal is killed. Furthermore, when copper ions are present, they act on the cell membrane, so that the oxidation-reduction potential falls outside the range suitable for growth, water cannot enter and exit, and energy metabolism due to metabolism is inhibited, which can also kill bacteria. .

And Cu ⁺⁺ (copper ion) that remains even if moisture evaporates
Prevents the growth of bacteria by the function of, high persistence. In contrast,
The conventional alcohol system has a strong sterilizing effect, but the persistence of the effect is lost by transpiration, and the chlorine system also has the disadvantage that the effect is lost due to transpiration, and chlorine itself is quickly absorbed by organic substances against organic substances. And its effectiveness against bacteria is low.

Furthermore, the alcohol-based and chlorine-based disinfectants both have an unpleasant odor during use, while the disinfectant of this example has a bad smell, and organic acids, especially L-tartaric acid, have a high deodorizing power and ammonia. , TMA (tritylamine = fishy odor), acetaldehyde (fatty odor), etc. are quickly removed, thereby minimizing the flies of flies, a public health enemy.

(First Experimental Example) FIG. 2 shows an example in which the bactericidal effect of the sterilizing solution of the present invention on each bacterium was measured, and FIG. 3 summarizes the results in a graph.
Here, VERO toxin-producing Escherichia coli (O-157, O-26), S
almonella paratyphi (S. paratyphi), Salmonella ty
phimurum (Salmonella typhimurium), one strain of 7 groups of Salmonella, Salmonella typhi (Salmonella typhi), Salmonella enter
itdis (enteritidis), methicillin-resistant staphylococci (MRSA)
Was tested.

To adjust the bacterial solution, make 1 to 4 × 10 ⁵ CFU / ml according to the DADE Microscan Prompt, and remove the bacterial disinfectant of this example (about pH 2.0 to 2.3, copper ion concentration 5 to 5) prepared for commercial use. 8ppm
Degree). After leaving for 3 minutes, 5 minutes, 10 minutes, 15 minutes, 20 minutes, 25 minutes, 30 minutes, 35 minutes, and 40 minutes from the start of the reaction, collect 0.01 ml each, and prepare a 10-fold diluted solution for the experimental group. Each strain was prepared and quantified at 37 ° C. for 24 hours using a BTB medium. The results are summarized in FIGS.

As can be seen from these figures, Escherichia coli (O-
When the bacteria elimination solution of this example is reacted with the live bacterial solution of 220 × 10 ³ / ml of 157), the antibacterial action already starts 3 minutes after the reaction starts,
In about 10 minutes, the bacteria had completely disappeared. As a result, it is found that the disinfecting solution according to the present invention is a particularly excellent disinfectant for Escherichia coli (O-157).

Furthermore, it has a particularly excellent bactericidal activity against the Salmonella Group, and is more resistant to fungicides than O-157.
The result was that those of 130 × 10 ³ / ml to 250 × 10 ³ / ml disappeared in about 25 to 30 minutes.

Escherichia coli (O-26) and Staphyrococcus aureu
For s (MRSA), the number of viable cells did not show a tendency to decrease until 25 minutes after the start of eradication.
-26 decreased to 1/13, MRSA decreased to 1/3, and it was confirmed that these also had a sufficient bactericidal effect. Separately, the bactericidal effect of the bacteria elimination solution of the present invention at a pH of about 1.8 was measured, but MRSA with a viable cell count of 500 × 10 ³ / ml was measured.
The results showed that the bacteria disappeared completely in a few minutes, indicating that a stronger bactericidal effect was obtained by adjusting the pH.

(Second Experimental Example) FIG. 4 summarizes the results of testing the sanitizing solution of the present invention at the Japan Food Research Laboratories. As the specimen, a disinfecting solution according to the present invention prepared for commercial use (pH 2.
Copper ion concentration adjusted to about 15 ± 0.15 6.5 ± 1.5 mg /
(Aqueous tartaric acid solution) was used as a test solution as it was. Test solution contains Staphylococcus aureus
IFO 12732), Salmonella enteritidis IF
O 3313), and Vibrio parahaemolyticus (Vibrio parahaemolyti)
cus RIMD 2210100), added for 2.5 minutes,
After 1 hour, 2 hours, 3 hours and 4 hours, the viable cell count of the test solution was measured.

As a bacterial solution, NB medium (meat extract from Eiken Chemical Co., Ltd.
A culture solution of a test bacterium which was shake-cultured (rotation speed: 80 to 90 rpm) at 35 ° C for 16 to 20 hours in a normal broth medium (2% added) was used. The test sample (the disinfecting solution according to the present invention) and the control (sterilized saline) were used as test solutions, except for Vibrio parahaemolyticus in which 3% salt was added to the sample and 3% in the control.
What added salt was used.

The test is performed by adding the bacterial solution to 20 ml of test solution that has been pre-incubated at 20 ° C.
Add 2 ml and mix, 2.5 minutes at 20 ° C., 1, 2, 3 and 4
After storing for 1 hour, 1 ml thereof was immediately diluted 10-fold with SCDLP medium (manufactured by Nippon Pharmaceutical Co., Ltd.). In a preliminary test, it was confirmed that diluting the test solution 10-fold with the SCDLP medium inactivated the bactericidal effect of the test solution against any of the test bacteria. The diluted solution was subjected to a pour plate culture method (35 ° C, 2 ° C) using an SA medium (standard agar medium manufactured by Eiken Chemical Co., Ltd.).
Viable cell count), and the number was counted as viable cell count per 1 ml of test solution. In addition, about the vibrio parahaemolyticus, what added 3% of salt to all the culture media was used.

The number of bacteria at the start of the measurement was determined by measuring the viable count of the control immediately after the addition of the bacterial solution. As for the control, only the viable cell count after 4 hours was measured. In addition, (-) in the table indicates that no bacteria were detected.

From the results of this experiment, the eradication solution of the present invention has a bacterial count of ~ 10 ⁷ /
Excellent effects are obtained even under conditions as large as ml.
For Staphylococcus aureus, almost no bacteria were detected in the measurement after 1 hour, and completely disappeared in the measurement after 3 hours. No bacteria were detected in Salmonella after 1 hour of measurement, and no bacteria were detected in Vibrio parahaemolyticus after 2.5 minutes of measurement. As described above, in the present experiment, results that can be highly evaluated with respect to the disinfecting solution of the present invention were obtained.

From these experimental data, the eradication solution of the present invention contains harmless pure copper ions mainly composed of vegetable organic acids or tartaric acid (authorized by the Ministry of Health and Welfare as a food additive) contained in wine, miso, sake, etc. Although it is a harmless sterilizing solution that is harmless to food and the human body, its sanitizing effect is extremely effective,
It can be applied to contamination of salmonella by cutting boards such as kitchens, kitchens, equipment in food processing plants, tableware, dogs and cats excreta in sandboxes such as schools and kindergartens, foot washing pools and the like. Therefore, in view of the fact that conventionally used chlorinated disinfectants, cytotoxic formalin disinfectants and the like are harmful to the human body, it is useful to use them instead.
In particular, the use of this drug is for infants (nursery schools, kindergartens), hospitalized patients,
It is judged to be the most suitable as a disinfectant for hygiene management of nursing home residents, health care workers, food hygiene officials, etc.

The disinfecting solution of the present invention has a pH value upon dilution when marketed.
It can be provided by adjusting it to about 1.40 to 4.0, and can be provided as a liquid sterilizing solution containing an appropriate amount of highly active copper ions. Therefore, as can be seen from the above experimental results,
By injecting the disinfecting solution of the present invention into a manual or automatic spraying device and spraying the place to be sterilized on an object or the like, a quick sterilizing effect with high immediate effect and a safe sterilizing effect on the human body can be obtained. For example, pH 2.0 in food factories, hotels, hospitals, canteens, catering centres, or supermarket backyards, butcher or fishmonger floors, cookware, cutting boards, etc.
By spraying the disinfecting solution of the present invention adjusted to as low as about 2.8, most of Gram-negative bacteria can be killed in a short time. In addition, even when the amount of organic matter is large, the bactericidal effect does not become ineffective due to the extreme attenuation like chlorine.

Also, by lowering the pH, it is possible to use it in a state where the immediate bactericidal effect is strong, and conversely, if pH is a problem, dilute it and use it in a high pH, near neutral state It is also possible. Further, even when the kitchen floor or machine equipment is wet, the effect of transpiration is slower than that of alcohol or chlorine, so that the effect is long lasting, and the sterilization power is not extremely reduced by a slight dilution with water. And
Since a sufficient amount of metallic copper ions is present in the disinfecting solution of the present invention, even if there are remaining bacteria, the bacteria can be separated from the breeding form and can be killed. Can last. Therefore, even if it is dried, the components remain as long as they are not washed away, so that the bactericidal effect is maintained, and an object such as a food factory floor or a food processing machine sprayed with the sanitizing solution of the present invention is free from contamination such as falling bacteria. Can be prevented for a long time. That is, the disinfecting solution of the present invention can first kill bacteria by acid, and can also prevent bacteria and the like that have fallen on the floor or the like from absorbing nutrients and growing exponentially. As described above, the disinfecting solution of the present invention can maintain a long-term disinfecting effect that cannot be obtained with conventional chlorine or alcohol-based bacterial agents, and can prevent contamination due to secondary growth such as falling bacteria. it can. In addition, considering the usage form in which spraying is repeatedly applied to the floor over a long period of time, the concentration of copper ions can be increased and bacterial contamination from the floor can be prevented. And the effect of suppressing the flying of flies, which are polluting media, can be obtained.

In this way, the conventional sterilization methods, such as a chlorine-based or alcohol-based disinfectant spraying and evaporating after spraying, rapidly reduce the effect, or if the object to be sterilized has water, the concentration is reduced and the effect does not appear. It can be said that the sterilization solution (bactericidal solution) of the present invention has solved the problem of the solution.

Furthermore, as described above, the disinfecting solution of the present invention can have a disinfecting function by using a type containing an organic acid such as tartaric acid or L-ascorbic acid as a main agent or an additive. Therefore, by spraying on the floor of a food factory that handles fish and meat, etc., it is possible to simultaneously remove peculiar putrefaction odor and the like. in this way,
For example, when the sanitizing solution of the present invention is used to wash food processing equipment and the like after finishing daily work, or sprayed on processing equipment such as a cutting board and a floor, etc., several days later, bacterial contamination in the factory is drastically reduced. it can. Therefore, by using the disinfecting solution of the present invention, it is possible to prevent food poisoning from occurring. In addition, since the method of use is simple and harmless to the human body, it can be used in a hospital or at home in a safe manner in the same manner as described above.

Since the disinfecting solution of the present invention is harmless to the human body and is composed of organic acids and the like that are recognized as food additives,
It can also function as a preservative by adding it to food products such as pasty products, udon / buckwheat, breads and confectionery. Since the pH of the disinfecting solution is adjusted to about 2.5 to 4.0, a bactericidal effect can be easily obtained by selecting the pH in consideration of the taste of food, and furthermore, a bacteriostatic effect to prevent the occurrence of bacteria. Can last. Of course,
It can be used in a state where the pH is low and the bactericidal effect is high. In addition, the disinfecting solution of the present invention can be used as a freshness preserving agent, preventing spoilage by bacteria by spraying on fresh foods, and furthermore, has a deodorizing effect, so that putrid smell is eliminated. It is also possible to prevent the progress of decay. Alternatively, there is also a utilization method in which freshness of ikebana is maintained for a long time by adding the disinfecting solution of the present invention to water in a vase containing ikebana. It can also be used when hydroponics vegetables such as sprouts and shellfish. Further, it can be used for washing vegetables and the like, and can exert functions of removing bacteria and maintaining freshness. By using the disinfecting solution of the present invention, the bactericidal effect can be maintained for a longer time than that of the chlorinating agent, so that it is possible to effectively reduce various germs. Prevent outbreaks of diseases during upbringing,
Since contamination by bacteria can also be prevented, it is possible to provide more highly safe vegetables. Further, the disinfecting solution of the present invention can be applied to other food fields such as tofu and konjac.

It goes without saying that the method of using the disinfecting solution of the present invention is not limited to the above. For example, it is possible to prevent bedsore by spraying on sheets, to remove black mold in a washing machine or to remove mold by spraying on a filter of an air conditioner. So it is possible to get rid of this. The effect can be obtained by directly injecting the disinfecting solution of the present invention into a drain port or the like. In addition, a sufficient sterilizing effect can be obtained only by immersing the disinfecting solution of the present invention in paper or cloth and wiping a disinfecting object such as a toilet seat. Further, it can be used for hand wiping or the like. As described above, the disinfecting solution of the present invention is harmless to the human body, has an immediate bactericidal effect and a persistent bactericidal effect, and is a convenient use form of an aqueous solution. Can be used in the field. Furthermore, since the germicidal solution of the present invention is odorless and has a deodorizing effect, it can be used in a wide range of fields including the food field. Therefore, the disinfecting solution of the present invention is a package suitable for home use with a sprayer, a commercial package containing about 20 L of disinfecting solution,
Furthermore, it can be provided in various product forms such as a gauze, a disinfecting sheet soaked in tissue, or a freshness maintaining sheet.

As described above, a disinfecting solution containing copper ions eluted from pure copper (pure copper ion) can be produced by the method for producing a disinfecting solution of the present invention. It is possible to provide a disinfecting solution that maintains a bactericidal effect. The disinfecting solution of the present invention is harmless to the human body and odorless because it contains copper ions that are harmless in accumulation and organic acids contained in food additives as main components. Furthermore, since the disinfecting solution of the present invention is a liquid sterilizing solution having a sustained effect that can also have a deodorizing effect, it can be easily used for various applications as described above, A bactericidal effect can be obtained. Thus, according to the present invention, it is possible to provide a disinfecting solution that can contribute to the industry and society in various fields in the future.

Industrial Applicability The disinfecting solution of the present invention contains a harmless pure copper ion, while being a disinfecting solution that is harmless to foods and human bodies, its disinfecting effect is extremely effective and has been used conventionally. It can be used in place of disinfectants or disinfectants such as chlorine-based disinfectants or alcohol-based disinfectants, and is used for cutting boards such as kitchens and kitchens, equipment for food processing plants, tableware, schools, etc. Since it is harmless to children, it is optimal as a disinfectant for infants, hospitalized patients, etc.

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-7-206617 (JP, A) JP-A-62-142559 (JP, A) JP-A-9-315927 (JP, A) JP-A-7-206 138155 (JP, A) JP-A-4-169505 (JP, A) JP-A-63-54937 (JP, A) JP-A-63-41408 (JP, A) JP-A-50-94119 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) A01N 59/20

Claims (10)

(57) [Claims] 1. Powdered pure copper is treated with water or an aqueous solution of an organic acid.
A method for producing a disinfecting solution, comprising a mixing step of mixing with the aqueous solution having a pH in the range of about 0.8 to 3.5. 2. The method according to claim 1, wherein the mixing step includes a step of stirring a solution obtained by mixing the powdered pure copper with an aqueous solution of water or an organic acid. 3. The method according to claim 1, wherein said pure copper is electrolytic copper. 4. The method according to claim 1, wherein the organic acid is at least one selected from the group consisting of tartaric acid, citric acid, ascorbic acid, lactic acid, malic acid and fumaric acid. 5. The method according to claim 1, wherein a strong electrolyte is dissolved in the water or the aqueous solution. 6. The method according to claim 5, wherein the strong electrolyte is salt. 7. A sanitizing solution produced by the method for producing a sanitizing solution according to claim 1. 8. A disinfecting solution mainly containing an aqueous solution of an organic acid containing pure copper ions and having a pH of about 0.8 to 3.5. 9. The disinfecting solution according to claim 8, wherein said organic acid is at least one of the group consisting of tartaric acid, citric acid, ascorbic acid, lactic acid, malic acid and fumaric acid. 10. A disinfecting medium comprising the disinfecting solution according to claim 8.