JPS63166490A - Method and apparatus for making long-term stable silver ion water - Google Patents

Abstract

PURPOSE:To hold a uniform concn. of silver ions, by a method wherein raw water is preliminarily subjected to deionization treatment and, after org. carboxylic acid is added to the treated water, the silver ion eluted in the first electrolytic cell is introduced into the second electrolytic cell where NaCl is added to form a complex. CONSTITUTION:Raw water is passed through an ion exchange substance such as an ion exchange resin to remove a Ca<2+> ion. Subsequently, 0.01-0.4wt.% of org. carboxylic acid is added to raw water and DC voltage is applied in the first electrolytic cell wherein silver is provided as an anode to form silver ion-containing raw water. Further, this raw water is passed through both of the anode chamber and the cathode chamber of the second electrolytic cell to obtain raw water containing a silver ion at desired concn. Subsequently, the raw water is introduced into a treatment tank where a predetermined amount of NaCl is added to change silver to a water-soluble complex. By this method, silver ion water having strong acting effect at low concn. can be easily obtained.

Description

Detailed Description of the Invention "Technical Field" The present invention can be used, for example, to prevent harmful effects caused by bacteria in food processing and distribution, improve soil in agriculture, improve environmental hygiene by preventing wood pollution, disinfection or treatment in medicine, etc. The present invention relates to a method and apparatus for producing long-term stable silver ion water.

"Prior art and its problems" Silver ion water can be used to prevent food poisoning caused by bacterial spoilage of food.
Its effectiveness as soil improvement in agriculture and disinfection treatment water in medicine is being proven, and its wide use is expected.

Conventionally, silver ion water has been produced by a method called the Katadin method, in which water is poured into an electrolytic chamber that has an anode and a cathode, and the anode is made of silver, while applying a voltage between the two electrodes. By circulating the water, silver is ionized and eluted to obtain silver ion water. however,
When silver is electrolyzed in this way, silver ions combine with CI- ions contained in water and precipitate over time.

Problems have arisen in that uniform silver ion water cannot be obtained and its effects cannot be accurately determined.

On the other hand, the present inventors first conducted a step of eluting silver ions through wet water while applying a voltage to a first electrolytic chamber having an anode and a cathode, in which silver was installed at the anode, and and a cathode, a diaphragm is formed between both electrodes, and the silver ions are eluted into the anode chamber and/or the cathode chamber of a second electrolytic chamber partitioned into an anode chamber and a cathode chamber. A method for producing silver ion water consisting of a step of obtaining acidic silver ion water and/or alkaline silver ion water through wet water has been proposed (Japanese Patent Application No. 123/1983). The acidic or alkaline silver ion water used in this study has been shown to have excellent effects by binding to proteins and not being deactivated even in the presence of protein components. Because it combines with CI- ions in water and causes precipitation, it is difficult to obtain uniform silver ion water, and it has been desired to stabilize the product.

In addition, the silver ion water obtained as described above requires a certain level of concentration, for example, when treating spore bacteria in foods, so it is safer to use silver ion water that is highly effective at lower concentrations. The development of silver ion water with high oxidation properties has been awaited.

"Objective of the Invention" The object of the present invention is to maintain a stable and uniform silver ion concentration over a long period of time, and to have high effects on target substances such as bacteria even at relatively low concentrations and in the presence of proteins. An object of the present invention is to provide a method and apparatus for producing long-term stable silver ion water that can produce silver ion wood.

"Structure of the Invention" The method for producing silver ion water of the present invention includes: a) deionizing wet water to remove ionic substances in the source water;
b) Adding IFr Kanki carboxylic acid to the deionized wet water; c) Applying a DC voltage to a II+ electrolytic chamber having a fil electrode and a cathode, and having silver as an anode. d) a second electrode having a III electrode and a cathode, with a diaphragm formed between the two electrodes and partitioned into an anode chamber and a cathode chamber; While applying a DC voltage to the electrolytic chamber, the wet water from which the silver ions have been eluted is passed through at least the cathode chamber side, and e) NaCltr is added to the wet water that has passed through the cathode chamber so that silver is present in the water as a soluble complex. It is characterized by

Furthermore, the apparatus for producing silver ion water of the present invention includes an ion exchange chamber filled with an ion exchange substance, a first turbidity tank for adding an organic carboxylic acid, an anode and a cathode, and the anode is provided with silver. a second electrolytic chamber having an anode and a cathode with a diaphragm formed between the two electrodes and partitioned into an anode chamber and a cathode chamber, and a second mixing tank for adding NaCl, It is characterized by having a flow path that allows at least wet water to flow out from the ion exchange chamber through the first mixing tank, the M1 electrolytic chamber, the cathode chamber of the second electrolytic chamber, and the second mixing chamber.

Hereinafter, the present invention will be explained in detail by citing preferred embodiments.

In the method for producing silver ion water of the present invention, the raw water used is first deionized in step a). In general, various types of raw water such as tap water and well water contain cations such as Ca''+ ions, M92+ ions, Na+ ions, H
Contains ionic substances such as CO- ions, 5O4- ions, CI- ions, anions such as silica colloidal organic acids, and has an electrical conductivity of 80 to 450 μU/c.
As is clear from the fact that rn', the ingredients of raw water cannot be stabilized and uniform raw water cannot be obtained.In order to obtain stable and uniform silver ion water, it is necessary to keep the ingredients of raw water constant. For example, it is necessary to pass the source water through an ion exchange material such as an ion exchange resin to remove cations and anions to a predetermined amount and to stabilize the components of the source water. In this case, the electrical conductivity of the deionized raw water is 30 to 150 uU/crrr, more preferably 40
~80 μU/crn' is desired. If the electrical conductivity of the raw water used for deionization treatment is less than 30 uU/cn (less than 30 uU/cn), the required amount of trace elements will not be met, and the organic carboxylic acid will make electrolysis more possible, resulting in the inconvenience of a strong sour taste. If the electric conductivity of the raw water in the deionized ridge exceeds 150 uc/rn', a reaction between CI- and ^9+ will occur, resulting in the inconvenience of clouding and colloidal formation.

An organic carboxylic acid is then added to the deionized raw water in step b). When the ions in the raw water are removed as described above, the electrical conductivity decreases, making it difficult to proceed with electrolysis smoothly. Therefore, it is necessary to add an ionizable compound @ to increase the electrical conductivity of raw water and facilitate electrolysis. However, in the production method of the present invention, an organic carboxylic acid, particularly preferably acetic acid use. Organic carboxylic acids, such as acetic acid, ionize in water to form carboxyl group ions CH3COO- and hydroxyl group ions H''! However, these ions are precipitated against silver ions generated by electrolysis in the next step C). It does not cause any reaction, and moreover, it acts on silver ions in the final step e) and contributes to the formation of a complex.The amount of such organic carboxylic acid added to deionized raw water is It is preferably 0.01 to 0.4% by weight, most preferably around 0.06% by weight.

If the amount of organic carboxylic acid added is less than 0.01% by weight, it will be difficult to adjust the electrolytic conditions, and if the amount of organic carboxylic acid added is more than 0.4% by weight, a sour taste will be felt.

The raw water to which the organic carboxylic acid has been added in this way is then passed through a first electrolytic chamber having an anode and a cathode, the anode of which is provided with silver, while applying a DC voltage, in step C). , silver ions are eluted into the raw water. Next, in the next step d), the raw water containing silver ions is supplied with a direct current to a second electrolytic chamber that has an anode and a cathode, a diaphragm is formed between both electrodes, and is divided into an anode chamber and a cathode chamber. It is important to flow the ionized water passed through at least the cathode chamber side to the next step while applying a voltage. It is considered that A9(OH)2- ions, CH3COO- ions, etc. are dissolved in the raw water taken out from the cathode chamber in this way. Note that the raw water containing silver ions obtained from the first electrolytic chamber may be passed through both the anode chamber and the cathode chamber of the second electrolytic chamber at the same time, in which case acidic A9◆ ions will be dissolved from the anode chamber. raw water is obtained.

However, when there is no need to produce raw water in which acidic A9+ ions etc. are dissolved, ordinary untreated raw water may be introduced into the anode chamber and flowed out of the system as is. In the electrolysis process, by adjusting the voltage, current and flow rate of raw water in the first electrolysis chamber,
A desired silver ion concentration can be obtained, and silver ion-concentrated IK
Even if the temperature is high, nodule colloids will not form.This is because
This is to adjust the silver ion concentration in the M1 electrolytic chamber and bring the silver ionized particles into a more stable state in the second electrolytic chamber.

The raw water in which the A9(OH)2- ions and CH, COO- ions thus obtained are then introduced into a treatment tank in step e), and a predetermined amount of NaCl is added thereto. The added NaCl is A9(OH)2 in the raw water.
- ions and CH3COO- ions, silver changes into a water-soluble complex, and the pH of the raw water changes from PH3 to
The pH drops to 8, then gradually rises to about 4.2. The reaction at this time has not yet been elucidated in detail, but eventually A9CH3COO-1
Complexes such as ^9C12-1^9C132- are formed,
It is thought that these are in a stable and dissolved state. In addition, the amount of NaCl added in step e) is preferably 1 to 10% by weight relative to the raw water, and if the amount added is less than 1% by weight, clouding and precipitation of AlCl will occur, and colloidal particles will be observed. This caused the inconvenience that the addition amount was 10
If it exceeds % by weight, there will be a problem that precipitation will occur due to excessive amount of base.

The silver ion water obtained in this way is made by adding silver to AqCH in the raw water.
Since it is dissolved as a complex such as 3COO-, A9C12-1A9C1s2-, coagulation and precipitation are unlikely to occur, and it can be stored stably for a long period of time. Moreover, the monovalent silver ions contained in conventional silver ion water are generally unstable and react with the action of light, causing halogenation.
It has been revealed that the silver ion water obtained by the present invention does not react at all even when irradiated with light and can be stored stably for a long period of time. Also, A9÷ ion or Ac+(0)1)z-
Compared to conventional silver ion water, which has ions dissolved in it, its bacteriostatic action is stronger. That is, when the silver ion water obtained by the present invention is administered into a living body, for example, it harmonizes with a large amount of CI- ions in the extracellular fluid of the body, maintains its complex salt state, and destroys the cell membrane of the target cell. Alternatively, it reaches bacteria and has a high bacteriostatic effect even at low concentrations. In addition, the silver ion water obtained by the present invention has a remarkable effect on Kokutai, which exists at a water content of about 30% in food, and has excellent bacteriostatic effects at a concentration that is completely safe for the human body. Obtainable. In addition, the silver ion water obtained in the present invention contains organic carboxylic acid, and since organic carboxylic acid has the effect of germinating spore-forming bacteria, it is difficult for spore-forming bacteria to immediately recover from germination. It also has an excellent bacteriostatic effect.

The method for producing long-term stable silver ion water of the present invention as described above can be suitably carried out using the above-described silver ion water production apparatus M of the present invention. It is sufficient that at least a flow path is formed that allows the raw water to flow out from the ion exchange chamber through the first mixing tank, the first electrolytic chamber, the anode chamber of the second electrolytic chamber, and the second mixing tank,
As mentioned above, the equipment that simultaneously produces acidic A9+ ionized water (this equipment also includes a flow path for flowing raw water from the ion exchange chamber through the first mixing tank, the first electrolytic chamber, and the anode chamber of the second electrolytic chamber). Also, such acidic A9
+ In an apparatus that does not produce ionized water, a flow path is also provided for causing the raw water to flow out through the anode chamber of the second electrolytic chamber. Of course, it is also possible to provide both flow paths in one device.

"Embodiment of the Invention" FIG. 1 shows an embodiment of the apparatus for producing silver ion water of the present invention.

This device mainly consists of an ion exchange chamber 11, an M1 mixing tank 1
2) It mainly consists of a g+ electrolytic chamber 13, a second electrolytic chamber 14, and a second mixing tank 15.

In this device, the first raw water pipe 16 is connected to the ion exchange chamber 11 via a flow meter 1718 in the middle. The ion exchange chamber 11 consists of an anion exchange chamber 11a and a cation exchange chamber 11b, each of which is filled with an anion exchange resin and a cation exchange resin.

This ion exchange chamber 11 is connected to the M1 mixing tank 12 by a first raw water pipe 16, but there is an EC (
An electrical conductivity) control detector 18 is provided. In addition, an acetic acid introduction pipe 20 extends from the acetic acid liquid tank 19 into the first mixing chamber 12 via a metering pump 21 . The first mixing tank 12 is roughly connected to the M1 electrolytic chamber 13 by a first raw water pipe 16, and an EC control detector 18 is also provided along the way.

The first electrolytic chamber 13 is surrounded by a bottom plate 22 made of a non-conductive material, a cathode plate 23 made of stainless steel or the like surrounding the outer periphery, and a lid plate 24 made of a non-conductive material. The cover plate 24 has an anode rod 2
5 is inserted, and its lower end extends inside. Moreover, silver or a silver alloy 26 is attached to the anode rod 25. Further, a connecting pipe 27.2 is connected to the lid plate 24, so that water in the first electrolytic chamber j3 can be drawn out. Note that the connecting pipe 27 is provided with a valve 29, and the connecting pipe 28 is provided with a valve 30.

On the other hand, the second electrolytic chamber 14 is surrounded by a bottom plate 31 made of a non-conductive material, a cathode plate 32 made of stainless steel or the like surrounding the outer periphery, and a lid plate 33 made of a non-conductive material.

An anode plate 34 is attached to the cover plate 33 so as to extend inward. And inside the second electrolytic chamber 14,
A cylindrical partition 11135 is arranged to surround the anode plate 34, and this partition 35 separates the anode chamber 36 from the cathode chamber 3.
It is divided into 7. The partition 1135 has the property of allowing cations to pass from the anode chamber 36 to the cathode chamber 37, allowing anions to pass from the cathode chamber 37 to the anode chamber 36, and preventing them from returning.

The aforementioned connecting pipes 27 and 28 are connected to the bottom plate 31, and the connecting pipe 27 communicates with the cathode chamber 37, and the connecting pipe 2 communicates with the anode chamber 36.

Further, lead-out pipes 38 and 39 are connected to the cover plate 33, and the lead-out pipe 38 passes through the cathode chamber 31, and the lead-out pipe 39 communicates with the anode chamber 36. Note that the outlet pipes 38 and 39 are provided with valves 40 and 41.

A second source water pipe 42 is connected between the pulp 29 of the connecting pipe 27 and the bottom plate 31 via a flow meter 43 and a pulp 4418. In addition, the pulp 30 of the connecting pipe 28
A third original pipe 45 is connected between the base plate 31 and the bottom plate 31 via a flow meter 46 and a pulp 47.

On the other hand, at the bottom of the outlet 048 of the outlet pipe 38, NaC
A second mixing tank 15 is installed for adding l.
Further, a lead-out pipe 49 is connected to the lower part of the second mixing tank 15, and a valve 50 is provided in the middle of the lead-out pipe 49. In the second mixing tank 15, a NaCl introduction pipe 52 extends from the Ha(l solution tank 51) through a metering pump 53 in the middle.

To obtain silver ion water using this device, source water is led to the ion exchange chamber 11 through the first source water pipe 16, anions and cations in the raw water are removed to a predetermined value, and the electrical conductivity of the wet water is The deionized wet water is discharged from the ion exchange chamber 11 to the first source water pipe 16, and is connected to the EC control O on the way.
The M11 mixture flows into the M11 mixed tank 12 while being controlled by the M11 metal detector 18 to check whether the electrical conductivity is at a predetermined value. A certain amount of acetic acid is added to the first mixing tank 12 from the acetic acid liquid tank 19 through an acetic acid introduction pipe, and mixed into the raw water at a concentration of 0.01 to 0.4% by weight. The wet water to which acetic acid has been added and mixed passes through the first source water via 16 and enters the first electrolytic chamber while being controlled by the EC control detector 18 to check whether the electrical conductivity is at a predetermined value. It reaches 13.

Here, when trying to obtain acidic A9◆ionized water at the same time using this device, pulp 29.30.40.4
1 is opened, pulp 44 and 47 are closed, and wet water is introduced from the first source water pipe 16. As a result, the wet water introduced from the first original pipe 16 forms silver ions in the first electrolytic chamber 13. A part of the water containing silver ions enters the anode chamber 36 of the second electrolytic chamber 14 through the connecting pipe 28, and the electrical conductivity formed in the anode chamber 36 is 100.
~2000u Ll/Crn' becomes acidic A9+ ion water and is taken out from the outlet pipe 39. At the same time, the remaining water containing silver ions enters the cathode chamber 37 of the M2 electrolytic chamber 14 through the connecting pipe 27, where ^9(OH), - ions, CH, COO- ions, etc. The dissolved water is taken out from the outlet pipe 38.

Incidentally, the total flow rate of water flowing through the first electrolytic chamber 13 is 4.5
The first electrolytic chamber 13 that is 1 when set to I2/l1lin
Figure 2 shows the relationship between electrical work and silver ion concentration.
In addition, the voltage and current of the second electrolytic chamber 14 and the second electrolytic chamber 1
FIG. 3 shows the relationship between the flow rate of water flowing through the cathode chamber 37 of No. 4 and the pH of water taken out from the cathode chamber 37 of the second electrolytic chamber 14.

Wet water in which A9(OH)2- ions and CHsCOO- ions are dissolved and taken out from the outlet pipe 38 flows into the second mixing tank 15. On the other hand, NaCl solution tank 51
A certain amount of NaCl has been introduced through the Cl introduction pipe 52. Therefore, the wet water is mixed with 0.01 to 0.4% by weight of NaCl in the second mixing tank 51, and
A9 (OH) such as bio-ion and CI-ion in raw water
Reacts with 2- ions and CH3COO- ions to form A9C
Complexes such as H3COO-1A9C12-1A9C13"- are formed. At the same time, the pH of the raw water once drops to 3.8, and then the pH gradually increases, and finally the pH
It will be about 4.2.

After the silver complex is formed, pulp 50
is opened and the desired silver ion water is taken out from the extraction vibrator 49.

Test Example Using the above device, the pH was 4,2) Silver ion concentration was 3
0ppb, 100ppb, 500ppb, 2ooop
PB, lppm silver ion water was produced. That fellow, big H! One platinum loopful of bacteria and Staphylococcus (concentration 108 cells/cm3) was taken into each solution, 0.1% broth was added, and the dynamics of the bacteria (number of native countries) was measured over time while culturing at 35°C.
was measured. The results for E. coli are shown in Figure 4.

Regarding staphylococci, the presence or absence of growth was measured by the turbidity of the solution, and the results were as shown in FIG. Thus, it was found that the silver ion water obtained by the production method of the present invention has a remarkable bacteriostatic effect.

In addition, the E. coli and Staphylococcus strains used above were cultured and the same experiment as above was repeated several times, but no bacteria resistant to silver ions appeared and the same static image effect as the first was observed. As described above, this silver ion has the characteristic that no development of resistant bacteria is observed, which is common knowledge in conventional chemical use.

Next, tomatoes were grown hydroponically using silver ion water under the following conditions.

Tomato variety: Vonderosa - Cultivation room: Unheated glass indoor culture medium = Rock wool, circulating culture medium Culture medium: Silver solution made by diluting "Bio Aqua" (product name, ■Manufactured by Sunlike) 1500 times with purified water Ionized water, a solution diluted 2000 times with PH3, was supplied for 10 minutes every 2 hours day and night.

In addition, in the above, the properties of the 0-Ryo culture solution, which was grown without using silver ion water as a control, are shown in Figure 6, and the ripeness and average maturation days of tomatoes grown with both culture solutions are shown in Figure 6. , the maximum number of days to maturity is shown in Figure 7.

Thus, it can be seen that the silver ions obtained by the production method of the present invention promote the ripening of tomatoes.

Furthermore, in order to determine the bactericidal power of the silver ion water obtained by the production method of the present invention, the following spore test was conducted.

First, 0.06% by weight of acetic acid was added to the silver ion water on the cathode side of the electrolyzed water, added to B and cereus detected from buckwheat flour, and heated in YCC medium at 37°C. The seeds were cultured for 24 hours and germination was confirmed. Also, 8
．． Similar culture was performed for S. 5butilis (spore suspension manufactured by Daiichi Kagaku Shuhin).

In order to know the bactericidal effect without heating the spores in which the spores were confirmed, the silver concentration of 100 pptl, 1 ppm obtained by the production method of the present invention was added to a culture medium with a bacterial concentration of 10'' to 10 cells/ml.
Add the silver ion book and get 10 minutes M+1! The number of viable bacteria was determined after contact. The results are shown in FIG.

In this way, 8. cereus, 8.5ubutili
It was found that the silver ion water obtained by the production method of the present invention has a remarkable bactericidal effect against S.

In addition, the following tests were conducted to examine the bactericidal ability of the silver ion water obtained by the production method of the present invention against heat-resistant bacteria. First, 30% buckwheat flour and 70% wheat flour.
Add 30% water (well water) to raw material flour to make buckwheat, and use various silver ion waters as boiling water to make buckwheat.
8, ce boiled for 3 minutes at 37°C and incubated for 24 hours at 37°C.
When the bactericidal effect against S. reus was investigated, as shown in FIG. 9, the effect of the silver ion water according to the present invention was the most remarkable.

"Effects of the Invention" As described above, according to the present invention, raw water is deionized in advance and organic carboxylic acid is added thereto, silver ions are eluted in the first electrolytic chamber, and the silver ions are eluted in the second electrolytic chamber. The silver ions were introduced into the cathode chamber of the chamber, and NaCl was added to form a complex of soluble silver ions, which maintains a stable dissolved state for a long period of time and has strong effects at low concentrations. Ionized water can be easily produced.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing an embodiment of the silver ion water production apparatus of the present invention, and Fig. 2 is a cross-sectional view showing an embodiment of the silver ion water production apparatus of the present invention, and Fig. 2 shows the case where the above apparatus is used and the total flow rate of water flowing through the first electrolytic chamber is 4.5β/min. A chart showing the relationship between the electrical work of the first electrolytic chamber and the silver ion concentration, and Figure 3 shows the voltage and current of the second electrolytic chamber and the water flowing through the anode chamber of the second electrolytic chamber when using the above device I. Figure 4 shows the relationship between the flow rate of water and the pH of the water taken out from the anode chamber of the period 2 electrolysis chamber. Figure 5 is a diagram showing the results of examining the bacterial effect. Figure 5 is a diagram showing the results of measuring the presence or absence of staphylococcus growth in the above test. Figure 6 is the IT of silver ion water produced by the above apparatus.
Figure N7 is a diagram showing the properties of the culture solution used for cultivating tomatoes for the experiment, Figure N7 is a diagram showing the results of the above cultivation test, and Figures 8 and 9 show the bactericidal action of the silver ion water produced by the above device. This is a chart showing the results of the investigation. In the figure, 11 is an ion exchange chamber, 12 is a first mixing tank, 13 is a first electrolysis chamber, 14 is a N2 electrolysis chamber, 15 is a NaCl mixing tank, 16 is a first raw water pipe, 19 is an acetic acid liquid tank, 2o is an acetic acid introduction pipe, 23 is a cathode plate, 25 is an anode rod, 26 is silver and silver alloy, 27.28 is a connecting pipe, 32 is a cathode plate, 34 is an anode plate, 35 is a diaphragm, 36 is a lll electrode chamber, 37
38 and 39 are the cathode chamber, 38 and 39 are the outlet pipes, 45 is the third source water introduction pipe, 49 is the outlet pipe, 51 is the NaCl solution tank, and 52 is the NaCl introduction pipe.

Claims (6)

[Claims] (1) a) Deionizing the source water to reduce ionic substances in the source water, b) adding an organic carboxylic acid to the deionized source water, and c) having an anode and a cathode, and an anode. d) silver ions are eluted through source water added with an organic carboxylic acid while applying a DC voltage to a first electrolytic chamber provided with silver, and d) having an anode and a cathode, with a e) passing the source water in which the silver ions have been eluted through at least the cathode chamber side while applying a DC voltage to a second electrolytic chamber in which a diaphragm is formed and divided into an anode chamber and a cathode chamber; e) through the cathode chamber; Na in the source water
A method for producing long-term stable silver ion water, which comprises adding Cl to cause silver to exist as a soluble complex in water. (2) The method for producing long-term stable silver ion water according to claim 1, wherein the source water is deionized until the electrical conductivity becomes 30 to 150 .mu./cm^3. (3) The method for producing long-term stable silver ion water according to claim 1 or 2, wherein the organic carboxylic acid is acetic acid. (4) In any one of claims 1 to 3, the long-term stable silver ion is characterized in that the amount of the organic carboxylic acid added is 0.01 to 0.4% by weight based on the source water. Water production method. (5) The method for producing long-term stable silver ion water according to any one of claims 1 to 4, wherein the amount of NaCl added is 1 to 10% by weight based on the source water. (6) An ion exchange chamber filled with an ion exchange substance, a first mixing tank in which an organic carboxylic acid is added, a first electrolytic chamber having an anode and a cathode, the anode of which is provided with silver, and an anode and a cathode. a second electrolytic chamber partitioned into an anode chamber and a cathode chamber with a diaphragm formed between both electrodes; and a second mixing tank for adding NaCl; 1
1. An apparatus for producing long-term stable silver ion water, comprising a mixing tank, a first electrolytic chamber, a cathode chamber of a second electrolytic chamber, and a flow path for flowing out through a second mixing chamber.