U.S. patent application number 14/411566 was filed with the patent office on 2015-07-09 for acidic electrolyzed water, and manufacturing method for same.
This patent application is currently assigned to Molex Incorporated. The applicant listed for this patent is Molex Incorporated. Invention is credited to Atsuhito Horino, Megumi Muramoto, Kazusa Saito, Kousuke Taketomi.
Application Number | 20150189889 14/411566 |
Document ID | / |
Family ID | 50201358 |
Filed Date | 2015-07-09 |
United States Patent
Application |
20150189889 |
Kind Code |
A1 |
Saito; Kazusa ; et
al. |
July 9, 2015 |
ACIDIC ELECTROLYZED WATER, AND MANUFACTURING METHOD FOR SAME
Abstract
To provide acidic electrolyzed water having disinfecting power
for a long period of time (for example, six months or more), and a
production method for this acidic electrolyzed water. The acidic
electrolyzed water has an effective chlorine concentration equal to
or greater than 15 ppm, and contains an acid salt of an inorganic
acid.
Inventors: |
Saito; Kazusa; (Yamato,
JP) ; Taketomi; Kousuke; (Yamato, JP) ;
Muramoto; Megumi; (Yamato, JP) ; Horino;
Atsuhito; (Ebina, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Molex Incorporated |
Lisle |
IL |
US |
|
|
Assignee: |
Molex Incorporated
Lisle
IL
|
Family ID: |
50201358 |
Appl. No.: |
14/411566 |
Filed: |
June 28, 2013 |
PCT Filed: |
June 28, 2013 |
PCT NO: |
PCT/IB2013/002588 |
371 Date: |
December 29, 2014 |
Current U.S.
Class: |
424/53 ; 205/556;
424/606; 424/661 |
Current CPC
Class: |
A61K 2800/83 20130101;
A61Q 17/005 20130101; A61K 8/20 20130101; A61Q 11/00 20130101; C02F
2001/46185 20130101; C02F 2305/023 20130101; A61Q 11/02 20130101;
C25B 1/26 20130101; C02F 1/66 20130101; C02F 2103/026 20130101;
A61Q 19/10 20130101; A61K 8/24 20130101; A01N 59/26 20130101; C02F
2201/461 20130101; C02F 1/4674 20130101; C02F 2103/04 20130101;
A01N 59/00 20130101; A61K 2800/92 20130101 |
International
Class: |
A01N 59/26 20060101
A01N059/26; A61K 8/20 20060101 A61K008/20; C02F 1/467 20060101
C02F001/467; A61Q 11/00 20060101 A61Q011/00; A61Q 11/02 20060101
A61Q011/02; C25B 1/26 20060101 C25B001/26; A01N 59/00 20060101
A01N059/00; A61K 8/24 20060101 A61K008/24 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 28, 2012 |
JP |
2012-145990 |
Jun 21, 2013 |
JP |
2013-131044 |
Claims
1. An acidic electrolyzed water having an effective chlorine
concentration equal to or greater than 15 ppm, and containing an
acid salt of an inorganic acid.
2. The acidic electrolyzed water of claim 1, wherein the pH value
is equal to or greater than 3.0 and less than 7.0.
3. The acidic electrolyzed water of claim 2, wherein the LD.sub.50
value of the acid salt of the inorganic acid is greater than 300
mg.
4. The acidic electrolyzed water of claim 3, wherein the acid salt
of the inorganic acid is at least one selected from among disodium
dihydrogen pyrophosphate, sodium hexametaphosphate, and sodium
dihydrogen phosphate.
5. The acidic electrolyzed water of claim 2, wherein the acid salt
of the inorganic acid is at least one selected from among disodium
dihydrogen pyrophosphate, sodium hexametaphosphate, and sodium
dihydrogen phosphate.
6. The acidic electrolyzed water of claim 1, wherein the LD.sub.50
value of the acid salt of the inorganic acid is greater than 300
mg.
7. The acidic electrolyzed water of claim 6, wherein the acid salt
of the inorganic acid is at least one selected from among disodium
dihydrogen pyrophosphate, sodium hexametaphosphate, and sodium
dihydrogen phosphate.
8. The acidic electrolyzed water of claim 1, wherein the acid salt
of the inorganic acid is at least one selected from among disodium
dihydrogen pyrophosphate, sodium hexametaphosphate, and sodium
dihydrogen phosphate.
9. A production method for acidic electrolyzed water including the
step of adding an acid salt of an inorganic acid to an acidic
electrolyzed water base material having an effective chlorine
concentration equal to or greater than 15 ppm.
10. A The production method of claim 5, further comprising the step
of purifying the acidic electrolyzed water base by electrolyzing a
chlorine-based electrolyte solution.
11. (canceled)
12. (canceled)
13. (canceled)
Description
REFERENCE TO RELATED APPLICATIONS
[0001] The Present Disclosure claims priority to PCT Application
No. PCT/IB2013/002588, filed on 28 Jun. 2013, which in turns claims
priority to prior-filed Japanese Patent Application Nos.
2012-145990, entitled "Acidic Electrolyzed Water and Production
Method Therefor," filed on 28 Jun. 2012 with the Japanese Patent
Office (JPO); and 2013-131044, also entitled "Acidic Electrolyzed
Water and Production Method Therefor," filed on 21 Jun. 2013 also
with the JPO. The content of each of the aforementioned Patent
Applications are incorporated in their entireties herein.
BACKGROUND OF THE PRESENT DISCLOSURE
[0002] The Present Disclosure relates, generally, to acidic
electrolyzed water and a production method for acidic electrolyzed
water.
[0003] Acidic electrolyzed water is electrolyzed water obtained by
electrolysis of a solution of water and an electrolyte such as
sodium chloride or hydrochloric acid. Acidic electrolyzed water
with a pH value of 2.7 or less is known as "highly acidic water,"
and has a strong disinfecting action. An example of highly acidic
water is illustrated in PCT Patent Application No.
PCT/JP1995/0001503, the content of which is hereby incorporated
herein in its entirety.
[0004] However, highly acidic water has a short disinfecting power
retention period, and this makes long-term storage difficult.
SUMMARY OF THE PRESENT DISCLOSURE
[0005] The Present Disclosure provides acidic electrolyzed water
having disinfecting power for a long period of time (at least three
weeks or more, for example, six months or more), and a production
method for this acidic electrolyzed water.
[0006] One aspect of the Present Disclosure is acidic electrolyzed
water having an effective chlorine concentration equal to or
greater than 15 ppm, and containing an acid salt of an inorganic
acid. In the Present Disclosure, "acid salt" is a salt containing
hydrogen atoms that can be substituted by metal atoms. Acid salt
also refers to a salt which dissolves in water and has acidic
properties (a pH value of less than 7.0). Preferably, the pH value
of the acidic electrolyzed water is equal to or greater than 3.0
and less than 7.0. Preferably, the LD50 value of the acid salt of
the inorganic acid in the acidic electrolyzed water is greater than
300 mg. In the acidic electrolyzed water, the acid salt of the
inorganic acid is at least one selected from among disodium
dihydrogen pyrophosphate, sodium hexametaphosphate, and sodium
dihydrogen phosphate.
[0007] Another aspect of the Present Disclosure is a production
method for acidic electrolyzed water which includes the step of
adding an acid salt of an inorganic acid to an acidic electrolyzed
water base material having an effective chlorine concentration
equal to or greater than 15 ppm. This also includes the step of
purifying the acidic electrolyzed water base by electrolyzing a
chlorine-based electrolyte solution.
[0008] Another aspect of the Present Disclosure is a cleanser
containing this acidic electrolyzed water.
[0009] Another aspect of the Present Disclosure is a denture
cleanser containing this acidic electrolyzed water.
[0010] Another aspect of the Present Disclosure is a disinfectant
containing this acidic electrolyzed water.
[0011] Because this acidic electrolyzed water has an effective
chlorine concentration equal to or greater than 15 ppm, and
contains an acid salt of an inorganic acid, it has disinfecting
power for a long period of time (at least three weeks or more, for
example, six months or more). This makes long-term storage
possible. It also makes storage easy because it retains its
disinfecting power even when it is not stored in a dark place, as
long as direct sunlight is avoided.
BRIEF DESCRIPTION OF THE FIGURES
[0012] The organization and manner of the structure and operation
of the Present Disclosure, together with further objects and
advantages thereof, may best be understood by reference to the
following Detailed Description, taken in connection with the
accompanying Figures, wherein like reference numerals identify like
elements, and in which:
[0013] FIG. 1 is a graph showing the relationship between the pH
value and the amount of disodium dihydrogen pyrophosphate when
acidic electrolyzed water with a pH value of 2.1 was used as the
base material and disodium dihydrogen pyrophosphate was used as the
acid salt of an inorganic acid in the first example of the Present
Disclosure;
[0014] FIG. 2 is a graph showing the relationship between the pH
value and the amount of sodium hexametaphosphate when acidic
electrolyzed water with a pH value of 1.7 was used as the base
material and sodium hexametaphosphate was used as the acid salt of
an inorganic acid in the first example of the Present
Disclosure;
[0015] FIG. 3A is a photograph showing the disinfecting power
evaluation results of the acidic electrolyzed water containing
disodium dihydrogen pyrophosphate was used as the acid salt of an
inorganic acid in the first example of the Present Disclosure (at
the start of the test);
[0016] FIG. 3B is a photograph showing the disinfecting power
evaluation results of the acidic electrolyzed water containing
disodium dihydrogen pyrophosphate as the acid salt of an inorganic
acid in the first example of the Present Disclosure when used
immediately after preparation (after cultivation for 24 hours);
[0017] FIG. 3C is a photograph showing the disinfecting power
evaluation results of the acidic electrolyzed water containing
disodium dihydrogen pyrophosphate when used as the acid salt of an
inorganic acid in the first example of the Present Disclosure (when
the same disinfecting power test was performed after storage of the
acidic electrolyzed water and the acidic electrolyzed water base
material for 21 days);
[0018] FIG. 4 shows photographs of moisturizing power evaluation
results of the acidic electrolyzed water containing sodium
hexametaphosphate as the acid salt of an inorganic acid in the
first example of the Present Disclosure; and
[0019] FIG. 5 shows the chemical equilibrium equation in the acidic
electrolyzed water of the Present Disclosure.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0020] While the Present Disclosure may be susceptible to
embodiment in different forms, there is shown in the Figures, and
will be described herein in detail, specific embodiments, with the
understanding that the Present Disclosure is to be considered an
exemplification of the principles of the Present Disclosure, and is
not intended to limit the Present Disclosure to that as
illustrated.
[0021] As such, references to a feature or aspect are intended to
describe a feature or aspect of an example of the Present
Disclosure, not to imply that every embodiment thereof must have
the described feature or aspect. Furthermore, it should be noted
that the description illustrates a number of features. While
certain features have been combined together to illustrate
potential system designs, those features may also be used in other
combinations not expressly disclosed. Thus, the depicted
combinations are not intended to be limiting, unless otherwise
noted.
[0022] In the embodiments illustrated in the Figures,
representations of directions such as up, down, left, right, front
and rear, used for explaining the structure and movement of the
various elements of the Present Disclosure, are not absolute, but
relative. These representations are appropriate when the elements
are in the position shown in the Figures. If the description of the
position of the elements changes, however, these representations
are to be changed accordingly. Further, in the Present Disclosure,
"parts" refers to "parts by mass" unless otherwise indicated.
1. Acidic Electrolyzed Water
1.1. Acid Salts of Inorganic Acid
[0023] The acidic electrolyzed water in the present embodiment of
the Present Disclosure includes an acid salt of an inorganic acid.
The acidic electrolyzed water in the Present Disclosure can
maintain disinfecting power for a long period of time (at least
three weeks or more, for example, six months or more). When the
acid salt of the inorganic acid is dissolved in water, the solution
is acidic (having a pH value of less than 7.0), and the amount of
acid salt of the inorganic acid in the acidic electrolyzed water of
the present embodiment has very little effect on control of the pH
value. As a result, it is easy to control the pH value when the
acidic electrolyzed water in the present embodiment is
prepared.
[0024] Preferably, from the standpoint of low toxicity, the acid
salt of the inorganic acid has an LD50 value greater than 300 mg.
The use of an acid salt of an inorganic acid with such an LD50
value is preferred from the standpoint of low toxicity when the
acidic electrolyzed water of the present embodiment is used in an
application as a medical, food or cosmetic product.
[0025] The acid salt of an inorganic acid may be a sodium salt,
potassium salt, magnesium salt, or barium salt. However, a sodium
salt is preferred from the standpoint of safety. Because the acidic
electrolyzed water of the preferred embodiment is easier to adjust
to a predetermined pH value (for example, a pH value equal to or
greater than 3.0 and less than 7.0), an acid salt of an inorganic
acid that is weakly acidic is preferred. The acidic electrolyzed
water in the present embodiment has a pH value equal to or greater
than 3.0 and less than 7.0. More specifically, the acid salt of the
inorganic acid may be at least one selected from among disodium
dihydrogen pyrophosphate, sodium hexametaphosphate, and sodium
dihydrogen phosphate. One or more type of acid salt of an inorganic
acid may be added.
[0026] The amount of acid salt of an inorganic acid added may be 16
g/L or more in the case of disodium dihydrogen pyrophosphate, 1.4
g/L or more in the case of sodium hexametaphosphate, and 4.4 g/L or
more in the case of sodium dihydrogen phosphate.
[0027] For example, when the acidic electrolyzed water of the
preferred embodiment is incorporated into a dental cleanser such as
a denture cleanser or mouthwash, the acid salt of an inorganic acid
is preferably disodium dihydrogen pyrophosphate because it can
prevent the re-deposition of tartar. The amount of disodium
dihydrogen pyrophosphate in the acidic electrolyzed water of the
present embodiment is preferably 16 g/L or more because it can both
maintain disinfectant power for a long period of time (at least
three weeks or more, for example, six months or more), and prevent
the re-deposition of tartar. The acidic electrolyzed water of the
present embodiment may also include components other than an acid
salt of an inorganic acid as long as the amount added does not
adversely affect the properties of the acidic electrolyzed water of
the present embodiment.
[0028] For example, when the acidic electrolyzed water of the
preferred embodiment is incorporated into a medical, food or
cosmetic product, the acid salt of an inorganic acid is preferably
sodium hexametaphosphate because it has a moisturizing action. The
amount of disodium dihydrogen pyrophosphate in the acidic
electrolyzed water of the present embodiment is preferably 1.4 g/L
or more.
1.2. Effective Chlorine Concentration
[0029] The acidic electrolyzed water of the present embodiment has
an effective chlorine concentration equal to or greater than 15
ppm, preferably equal to or greater than 20 ppm. In the Present
Disclosure, the effective chlorine concentration of the acidic
electrolyzed water can be measured using a commercially available
residual chlorine concentration measuring device.
1.3. pH Value
[0030] The pH value of the acidic electrolyzed water of the present
embodiment is preferably equal to or greater than 3.0 and less than
7.0 from the standpoint of exhibiting disinfecting power, ensuring
the stability of the acidic electrolyzed water, and suppressing the
occurrence of trihalomethane. In the Present Disclosure, the pH
value of the acidic electrolyzed water can be measured using a
commercially available pH measuring device.
1.4. Chloride Ion Concentration
[0031] Preferably, the acidic electrolyzed water of the present
embodiment has hardly any chloride ions derived from the
electrolyte because this suppresses metal corrosion.
1.5. Operation and Effects
[0032] Because the acidic electrolyzed water of the present
embodiment has an effective chlorine concentration equal to or
greater than 15 ppm, and contains an acid salt of an inorganic
acid, it has disinfecting power for a long period of time (at least
three weeks or more, for example, six months or more). This makes
long-term storage possible. It also makes storage easy because it
retains its disinfecting power even when it is not stored in a dark
place, as long as direct sunlight is avoided.
[0033] FIG. 5 shows the chemical equilibrium equation in the acidic
electrolyzed water of the Present Disclosure. Equation (a) in FIG.
5 maintains the equilibrium in the acidic electrolyzed water of the
Present Disclosure. Hydrochloric acid (HCl) maintains the
equilibrium between Equation (a) of FIG. 5 and Equation (b) of FIG.
5 as indicated by arrows (1) and (2), and hypochlorous acid (HClO)
maintains the equilibrium between Equation (a) of FIG. 5 and
Equation (c) of FIG. 5 as indicated by arrows (3) and (4). Because
hydrochloric acid is a very strong acid, ionization readily occurs
and arrow (2) predominates. Because hypochlorous acid is affected
by the hydrochloric acid, hardly any ionization occurs and arrow
(3) predominates.
[0034] Because the acidic electrolyzed water of the present
embodiment includes an acid salt of an inorganic acid, the acid
salt of the inorganic acid is dissolved in the acidic electrolyzed
water of the present embodiment, anions derived from the acid salt
of the inorganic salt bond with the hydrogen ions and reduce the
number of free hydrogen atoms, and the pH value rises. Because this
biases the equilibrium in Equation (a) of FIG. 5 to the right, the
release of chlorine gas from the acidic electrolyzed water can be
suppressed. It can also retain disinfecting power over a long
period of time.
[0035] When an organic material such as an organic acid or salt of
an organic acid is present in the acidic electrolyzed water, the
organic material is oxidized by the chlorine, and the chlorine is
consumed. As a result, the disinfecting power may decline. However,
because the acid salt of an inorganic acid in the present
embodiment is not an organic material, it is not oxidized by
chlorine, and the disinfecting power is maintained for a long
period of time. More specifically, the oxidizing power can be
maintained for a long period of time when the acidic electrolyzed
water of the present embodiment is substantially free of organic
materials.
2. Acidic Electrolyzed Water Production Method
[0036] Another aspect of the Present Disclosure is a production
method for acidic electrolyzed water which includes the addition of
an acid salt of an inorganic acid to an acidic electrolyzed water
base material having an effective chlorine concentration equal to
or greater than 15 ppm.
[0037] The acidic electrolyzed water base material used as the base
material in the production method for the acidic electrolyzed water
of the present embodiment (referred to below as the "acidic
electrolyzed water base material") has an effective chlorine
concentration equal to or greater than 15 ppm (preferably equal to
or greater than 20 ppm).
2.1 Preparation of Acidic Electrolyzed Water Base Material
[0038] The production method for acidic electrolyzed water in the
present embodiment can include a step in which the acidic
electrolyzed water base material is purified by electrolyzing a
chlorine-based electrolyte solution.
[0039] In the Present Disclosure, a "chlorine-based electrolyte" is
an electrolyte that produces chlorine ions when dissolved in water.
Examples of chlorine-based electrolytes include chlorides of alkali
metals (such as sodium chloride and potassium chloride) and
chlorides of alkaline-earth metals (such as calcium chloride or
magnesium chloride).
[0040] The electrolyzed water base material can be purified using a
water electrolyzing device in which a cathode chamber and an anode
chamber are partitioned by a membrane (two-tank water electrolyzing
device). Here, the cathode chamber and the anode chamber are filled
with chlorine-based electrolyte solution and electrolysis is
performed. The electrolyzed water base material can also be
purified using a water electrolyzing device in which a cathode
chamber and an anode chamber are partitioned by a membrane, and in
which a middle chamber is partitioned from both the cathode chamber
and an anode chamber by two membranes (three-tank water
electrolyzing device). Here, the cathode chamber and the anode
chamber are filled with a highly concentrated chlorine-based
electrolyte solution and electrolysis is performed.
[0041] When the water electrolysis is performed using a two-tank
water electrolyzing device, the concentration of the chlorine-based
electrolyte solution is preferably from 0.1 to 0.2%. When the water
electrolysis is performed using a three-tank water electrolyzing
device, the concentration of the chlorine-based electrolyte
solution does not have a significant effect on the properties of
the prepared acidic electrolyte water base material, but should be
as high as possible.
[0042] From the standpoint of a low concentration of electrolytes
in the acidic electrolyzed water base material, the acidic
electrolyzed water base material should be prepared using a
three-tank water electrolyzing device. When the acidic electrolyzed
water base material is prepared using a two-tank water
electrolyzing device, the concentration of the electrolytes in the
acidic electrolyzed water base material can be lowered by adding
purified water (distilled water or ion-exchanged water) to the
electrolyzed water used in the two-tank water electrolyzing
device.
[0043] The acidic electrolyzed water base material may be prepared
using one of the water electrolyzing devices described above.
Alternatively, since there are several commercially available water
electrolyzing devices, the acidic electrolyzed water base material
may be prepared using one of these commercially available water
electrolyzing devices.
[0044] Examples of commercially available water electrolyzing
devices include the Excel FX.TM. (model: MX-99, manufacturer: Nambu
Co., Ltd.); ROX-10WB3 (manufacturer: Hoshizaki Denki Co., Ltd.);
.alpha.-Light (manufacturer: Amano Co., Ltd.); ESS-ZERO.TM.
(manufacturer: Shinsei Co., Ltd.); and FINEOXER Desktop
FO-1000S2.TM. (manufacturer: First Ocean Co., Ltd.). The acidic
electrolyzed water base material can be prepared using any one of
these commercially available water electrolyzing devices. The
acidic electrolyzed water base material can also be produced using
the electrolyzed water production method described in Japanese
Patent Application No. 2000-108971, the content of which is hereby
incorporated herein in its entirety.
2.2 Addition of Acid Salt of Inorganic Acid to Acidic Electrolyzed
Water Base Material
[0045] The amount of acid salt of an inorganic acid added to the
acidic electrolyzed water base material when the acidic
electrolyzed water of the present embodiment is produced is that
which was described in Section 1.1. Acid Salts of Inorganic
Acid.
[0046] Also, the pH value of the acidic electrolyzed water base
material during the production of the acidic electrolyzed water of
the present embodiment is preferably equal to or greater than 1.7
and less than 7.0, more preferably equal to or greater than 1.7 and
less than 6.0, and even more preferably equal to or greater than
1.8 and less than 6.0.
3. Applications
[0047] The acidic electrolyzed water of the present embodiment can
be used as a disinfectant and/or cleanser for disinfecting and/or
cleaning operations in various industries, such as the medical
industry, the livestock industry, the food processing industry, and
manufacturing. For example, it can be used to disinfect and/or
clean tools or wounds in medicine or animal husbandry.
[0048] The acidic electrolyzed water of the present embodiment can
also be used as an oral cleanser (toothpaste, mouthwash, dental
paste) or a denture cleanser. For example, when the acidic
electrolyzed water of the preferred embodiment contains disodium
dihydrogen pyrophosphate, it is suitable for use as a denture
cleanser because it can prevent the re-deposition of tartar. When
the acidic electrolyzed water of the preferred embodiment contains
sodium hexametaphosphate, it is suitable for use as a lotion,
disinfectant spray, antiseptic or hand disinfectant because of its
moisturizing action.
[0049] Because the acidic electrolyzed water in the present
embodiment is highly stable, acidic electrolyzed water can be
placed in a container.
4. Example
[0050] The following is a more detailed explanation of the Present
Disclosure with reference to an example, but the Present Disclosure
is not restricted to this example.
4.1. Example 1
4.1.1. Preparation Example 1
Preparation of Acidic Electrolyzed Water Base Material
[0051] First, acidic electrolyzed water base materials 1 and 2 were
prepared for use in the example. Acidic electrolyzed water base
materials 1 and 2 were produced using acidic electrolyzed water
production equipment (trade name: Fineoxer FO-1000S2 Desktop
Model). When acidic electrolyzed water base materials 1 and 2 were
prepared sodium chloride was used as the chlorine-based
electrolyte. Acidic electrolyzed water base material 1 had an
effective chlorine concentration of 91 ppm, and a pH value of 2.1.
Acidic electrolyzed water base material 2 had an effective chlorine
concentration of 91 ppm, and a pH value of 1.7.
[0052] In this example, the pH value was measured using a pH
measuring device (trade name: Digital pH Pentester from SAGA
Electronic Enterprise Co., Ltd.), and the effective chlorine
concentration was measured using a chlorine concentration measuring
device (trade name: Aquab from Shibata Chemical Co., Ltd.).
4.1.2. Preparation Example 2
Preparation of Acidic Electrolyzed Water Containing Acid Salt of
Inorganic Acid
[0053] Next, disodium dihydrogen pyrophosphate (Taihei Chemical
Industrial Co., Ltd.) was added and dissolved in acidic
electrolyzed water base material 1 to prepare acidic electrolyzed
water containing disodium dihydrogen pyrophosphate. Here, the pH
value of the acidic electrolyzed water was measured each time the
added amount of disodium dihydrogen pyrophosphate was changed. FIG.
1 is a graph showing the relationship between the pH value and the
added amount of disodium dihydrogen pyrophosphate. FIG. 1 indicates
the added amount (g) of disodium dihydrogen pyrophosphate per liter
of acidic electrolyzed water base material.
[0054] It is clear from FIG. 1 that more than 16 g of disodium
dihydrogen pyrophosphate had to be added to raise the pH value of
the acidic electrolyzed water to 2.7 or more when the pH value of
the acidic electrolyzed water base material was 2.1.
[0055] Also, 20 g/L disodium dihydrogen pyrophosphate was added and
dissolved in acidic electrolyzed water base material 1 to prepare
the acidic electrolyzed water, which was stored for six months at
room temperature (26.degree. C.) without shielding the preparation
from light. After storage for six months at room temperature, the
effective chlorine concentration was 49 ppm, and the pH value was
3.1. It was clear that the effective chlorine concentration, pH
value and chlorine ion concentration remained unchanged, even when
the acidic electrolyzed water containing an acid salt of an
inorganic acid (disodium dihydrogen pyrophosphate) was stored for a
long period of time.
4.1.3. Preparation Example 3
Preparation of Acidic Electrolyzed Water Containing Acid Salt of
Inorganic Acid
[0056] Next, sodium hexametaphosphate (Happou Shokai Co., Ltd.) was
added and dissolved in acidic electrolyzed water base material 1 to
prepare acidic electrolyzed water containing sodium
hexametaphosphate. Here, the pH value of the acidic electrolyzed
water was measured each time the added amount of sodium
hexametaphosphate was changed. FIG. 2 is a graph showing the
relationship between the pH value and the added amount of sodium
hexametaphosphate. FIG. 2 indicates the added amount (g) of sodium
hexametaphosphate per liter of acidic electrolyzed water base
material.
[0057] It is clear from FIG. 2 that more than 6.2 g of sodium
hexametaphosphate had to be added to raise the pH value of the
acidic electrolyzed water to 3.0 or more when the pH value of the
acidic electrolyzed water base material was 1.7.
4.1.4. Test Example 1
Disinfecting Power Evaluation Test
[0058] Next, a disinfecting power evaluation test was performed
using the acidic electrolyzed water of the example. First, 20 g of
disodium dihydrogen pyrophosphate (Taihei Chemical Industrial Co.,
Ltd.) was added and dissolved as the acid salt of an inorganic acid
in 1,000 ml of acidic electrolyzed water base material 1 to the
prepare the acidic electrolyzed in Test Example 1. The pH value of
the acidic electrolyzed in Test Example 1 was 3.3.
[0059] Next, a strain of fungus (Candida albicans) was collected
and added to 5 ml of the acidic electrolyzed water in Test Example
1. Next, after ultrasonic processing for 15 minutes of the acidic
electrolyzed water (5 ml) containing the fungus in Text Example 1,
the water was stirred and applied to an agar medium. The agar
medium was placed inside a thermostatic bath at 35.degree. C., and
cultivated for 22 days. The same treatment was applied to
physiological saline and the acidic electrolyzed water base
material 1 instead of the acidic electrolyzed water in Test Example
1 as controls. The results are shown in FIG. 3A through FIG.
3C.
[0060] FIG. 3A is a photograph showing the agar medium at the start
of the test. FIG. 3B is a photograph showing the agar medium after
cultivation for 24 hours using the acidic electrolyzed water
immediately after preparation, the acidic electrolyzed water base
material, and saline. FIG. 3C is a photograph showing agar medium
when the disinfecting power test was performed after storage of the
acidic electrolyzed water and the acidic electrolyzed water base
material for 21 days. In FIG. 3C, physiological saline was prepared
to perform a control test to confirm cultivation of the fungus. In
FIG. 3A through FIG. 3C, "1" denotes the group to which the acidic
electrolyzed water of Test Example 1 (acidic electrolyzed water 1
containing dissolved disodium dihydrogen pyrophosphate) has been
applied ((acidic electrolyzed water+acid salt of inorganic acid)
group), "2" denotes the group to which acidic electrolyzed water 1
has been applied (acidic electrolyzed water 1 group), and "3"
denotes the group to which physiological saline has been applied
(the physiological saline group).
[0061] In FIG. 3A, fungi 4 were not observed in any of the groups
immediately after cultivation started. In FIG. 3B, fungi 4 were
observed in the physiological saline group 24 hours after the start
of cultivation. In FIG. 3C, fungi 4 were observed in the acidic
electrolyzed water base material 1 group when tested after 21 days
in storage. In contrast, no fungi 4 were observed in the acidic
electrolyzed water group of the Present Disclosure under any
conditions, ranging from immediately after cultivation to 22 days
after the start of cultivation (see FIG. 3A, FIG. 3B, and FIG. 3C).
These results confirm that the acidic electrolyzed water in
Preparation Example 1 containing an acid salt of an inorganic acid
(disodium dihydrogen pyrophosphate) retained its disinfecting power
for a long period of time. Because the cultivation test was not
performed while shielded from light, the acidic electrolyzed water
of the Present Disclosure clearly was able to retain its
disinfecting power even when it was not stored in a dark place.
[0062] As a negative control, 3.0 g of disodium dihydrogen
pyrophosphate was dissolved in 150 ml of tap water (pH: 7.5,
effective chlorine concentration: 3 ppm), and the resulting liquid
(pH: 4.0) was processed in the same manner as Test Example 1. When
the liquid was applied to an agar culture and cultivated in the
same manner as above, fungi were observed 24 hours after the start
of cultivation. It is clear from this that the disinfecting power
of the acidic electrolyzed water of the Present Disclosure is not
derived from the acid salt of the inorganic acid (disodium
dihydrogen pyrophosphate).
4.1.5. Test Example 2
Moisturizing Power Evaluation Test
[0063] Next, a moisturizing power evaluation test was performed
using the acidic electrolyzed water of the example. First, 8.6 g of
sodium hexametaphosphate (Happou Shokai Co., Ltd.) was added and
dissolved as the acid salt of an inorganic acid in 1000 ml of
acidic electrolyzed water base material 2 to prepare the acidic
electrolyzed in Test Example 2. The pH value of the acidic
electrolyzed in Test Example 2 was 3.5. Next, a 3.9 cm.times.3.2
cm.times.1.5 cm sticky rice cake (mochi) was immersed and coated
for 5 minutes in the acidic electrolyzed water (100 ml) and then
allowed to stand at room temperature. The surface conditions of the
sticky rice cake were then observed. As a control, the same process
was performed using the acidic electrolyzed water base material
(100 ml), tap water (100 ml), and alcohol (an ethanol aqueous
solution) (100 ml). The results are shown in FIG. 4.
[0064] FIG. 4 shows photographs of moisturizing power evaluation
results of the acidic electrolyzed water containing, as the acid
salt of an inorganic acid, sodium hexametaphosphate in the second
text example of the Present Disclosure. In FIG. 4, Test No. 1
denotes the group to which the acidic electrolyzed water of Test
Example 2 (acidic electrolyzed water 1+sodium hexametaphosphate),
Test No. 2 denotes the group to which acidic electrolyzed water 2
has been applied, Test No. 3 denotes the group to which nothing has
been applied, Test No. 4 denotes the group to which tap water has
been applied, and Test No. 5 denotes the group to which alcohol has
been applied. FIG. 4 shows photographs of each group immediately
after application (zero hours after application) and five hours
after application. In order to make it easier to check for cracks,
the surfaces of the sticky rice cakes in the photographs were
stained with red ink five hours after application.
[0065] In the results, small cracks were observed two hours after
application in the group to which the acidic electrolyzed water of
Test Example 2 had been applied (Test No. 1). Fine cracks were
observed 15 minutes after application in the group to which the
alcohol had been applied (Test No. 5). Cracks were observed in the
surface of the sticky rice cakes two hours after application in the
case of the group to which the acidic electrolyzed water base
material 2 had been applied (Test No. 2), the group to which
nothing had been applied (Test No. 3), the group to which tap water
had been applied (Test No. 4), and the group to which alcohol had
been applied (Test No. 5). From these results, it is clear that the
acidic electrolyzed water of Preparation No. 2 has moisturizing
action because of the inclusion of the acid salt of an inorganic
acid (sodium hexametaphosphate).
[0066] While a preferred embodiment of the Present Disclosure is
shown and described, it is envisioned that those skilled in the art
may devise various modifications without departing from the spirit
and scope of the foregoing Description and the appended Claims.
* * * * *