JPS61120690A - Deodorant for drinking water - Google Patents

Abstract

PURPOSE:To deodorize drinking water, by using a chelate agent such as citrate or gluconate and sulfite as main components. CONSTITUTION:A chelate agent such as citrate, gluconate, phosphate, polyphosphate or phytic acid and sulfite are used as main components and conditioned under mixing. This conditioning agent is used in drinking water in such an amount that the total amount of the chelate agent is 0.01-0.1meq. per 1l of drinking water and sulfite is 0.008-0.16meq.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention is characterized by the presence of one, T4, or two or more of the following: excessive loose odor, off-flavors caused by algae or mold, and metallic odors caused by excessive dust. This invention relates to a drinking water deodorizing agent which easily and safely deodorizes drinking water that causes discomfort when drinking, and which has one or more chelating agents and sulfite as essential components.

In recent years, rivers, lakes, etc. have become significantly contaminated, and as a result of eutrophication, abnormal growth of algae and microorganisms frequently occurs in drinking water sources. For this reason, tap water may have a so-called sea odor caused by algae and microorganisms, and as filtrate contamination progresses, it is necessary to increase the amount of chlorine added for treatment, resulting in the concentration of free chlorine remaining in tap water. There are many occasions when the concentration of chlorine exceeds the perceptible level and a so-called chlorine odor is felt. Furthermore, with the increase in the number of apartment complexes in recent years, there has been an increase in the number of cases in which tap water is temporarily stored in elevated water tanks and then distributed to each unit. I'm hearing more and more complaints about people feeling anxious. This candy also has problems with drinking water, including the problem of trihalomethanes, a carcinogen produced as a result of chlorination of organic matter, the problem of tooth formation due to excessive fluoride, and the problem of imbalance of copper and zinc mixed in, which causes high blood pressure and arteriosclerosis. There are many problems surrounding tap water.

Among these problems, problems related to odors such as ocean odor, chlorine odor, and metallic odor during drinking do not necessarily impair human health, but they do cause discomfort and are not favorable for mental health. .

This invention relates to a drinking water deodorizing agent that eliminates these three types of odors simply, quickly, and easily. ・As a method for eliminating these odors, is there any way to eliminate odors? 3 by adsorbing on activated carbon or ion exchange resin, or using an ultrafiltration membrane.
In recent years, methods of separating the equipment and removing it have become popular, but these methods require special equipment and are generally expensive, and can cause abnormal growth of microorganisms such as bacteria in the equipment when it is not in operation, which can actually cause health problems. However, it is not necessarily a perfect method, as it has drawbacks such as the need for aftercare and troublesome treatment.

The deodorizing agent of this invention is added to tap water that contains odoriferous substances to deodorize it, and it seems to go against the common sense theory that it is better for drinking water to contain as few foreign substances as possible. However, given that all beverages other than drinking water contain abundant substances other than water, this common sense theory is a prejudice based on a lack of understanding. The substance to be added to the deodorizing agent for drinking water according to the present invention is a chelating agent selected from a plurality of candidates, and a sulfite. is the main subject. There is no problem in adding aromatic agents or substances with sour or sweet taste, but the safety of these substances to living organisms is not relevant to this invention. Regarding the side effects of sulfites, as discussed in a review by N.F. Jennison (Food and Cosmetic Toxicology Vol. 19, 1981, pp. 667-682), which cites numerous documents, There is almost no chance of it happening. In addition, sodium salt, which represents sulfites, is a substance listed in the Official Food Additives Standard, and the residual amount in food is 59 to 9 L.
A high concentration of 694 is permissible, and the other four substances are all listed in the Official Standards of Food Additives, and their permissible residual amounts in good products are so large that they do not exceed the regulations, or the present invention This is a much higher concentration than if the entire amount of the drinking water deodorizer remained unreacted. Regarding reaction products, sulfite reacts with free chlorine (changes into sulfate and chloride, but both of these products exist in large quantities in living organisms as essential components of living organisms. In addition, Chelate 41 chelates dissolved iron and produces a negative image, and does not necessarily produce a new compound.In any case, the amount of odorless 41 added to drinking water according to the present invention is the same as that of itself. It is obvious that it is harmless to living organisms, as it is necessary to keep the concentration to a minute level where the taste cannot be detected.

Next, the deodorizing function of the drinking water deodorizing agent of the present invention will be discussed for each odor.

Chlorine odor is based on residual free chlorine.

There are large individual differences in the perceived darkness value, with some people sensing it even at 0.1□, which is the lower limit of the water quality standard under the Water Supply Act, but the residual darkness value, which is a practical problem, is 0.3 to 1.0. It seems to be within the Irl range. 1.0pIllIT+ exhibits a significant odor;
It is unlikely that tap water containing more than this amount of residual chlorine would be supplied except in an accident. Chlorine has a strong oxidizing property, and reacts instantly with a strongly reducing sulfite (for example, sulfite) in a 1:1 molar ratio to produce 1 mol of sodium sulfate and 2 mol of 42 ions. do.

C12+Na25o3+H2o=Na2So4-HO2
: +2H" Sea odor has complex odor components and is difficult to identify, but when we tested the odor detection threshold concentration using simulated dry crushed black V powder and beer yeast extract dry powder, strangely the odor detection threshold concentration was detected in both cases. The odor limit concentration was 80.
Of course, these powders as a whole are not odor-producing substances;
The true concentration of odorants should be extremely low, and since it is an organic substance, there is a possibility that it will be reduced and deodorized by sulfite at a low concentration.

Iron, which gives a metallic feel, is usually mixed into tap water as three-sided ions or iron oxides, and this makes an insoluble bond with proteins in the inner mucosa (i=q), thereby giving a metallic taste. Trivalent iron is reduced to valent iron ions by sulfites, but divalent iron ions also give off a metallic feel, so the action of sulfites alone cannot remove the metallic atmosphere. Metallic particles are removed by forming an iron chelate using the chelate 41, preventing the release of iron ions and inhibiting their binding with proteins. The water quality standards stipulate that iron content is 0.3 ppm or less, but the Ministry of Health and Welfare's proposal published on April 2, 1981 states that iron should not exceed 0.3 ppm.
+J has been proposed to contain less than 2 ppm of iron, and removing the off-flavors of Chichitsu has become an extremely important issue in drinking water treatment.

As mentioned above, the drinking water fish brominating agent of the present invention contains a suitable chelating agent and sulfite as essential ingredients, but these ingredients must be soluble in drinking water to be effective. There are no restrictions on the form, and any suitable dosage form may be used, such as solid preparations such as tablets and granules, or liquid preparations.

-Next, preferred formulation examples of the drinking water fish brominating agent of the present invention will be explained with reference to Examples.

Example 1, sulfite l) Take 83 g of rum O and dissolve it in purified water to make 100 IIll, and use it as an odor-free sample. Separately,
Dilute the chlorine solution with purified water to prepare a test sample containing approximately 107 free chlorine, and add the samples in stages to 100 companies to measure the degree of decrease in free chlorine concentration. The measured results are shown in Table 1.

The sulfite reacts quickly and quantitatively with free chlorine to reduce the free chlorine concentration.

Example 2: Take 0.2f of IJum (sulfite) and dissolve it in purified water to give 10O1.11, which is used as an odorless detoxifying agent sample. Separately, dry and crushed chlorella powder is dissolved in purified water to prepare a series of odorized liquids with a series of concentrations with a minimum concentration of 80 houses, which is used as liquid S. Take 2β of each test solution, and while stirring, drop the sample one drop at a time using a dropper bottle adjusted to 50μ per drop, and 2 minutes after each drop, add 100μ of the long wave. ．． 1 sample and replenish 100 purified water. A small amount of the sampled mixed liquid is placed in the mouth, and the number of drops at which the odor is no longer detected is determined. Addition of sulfite l-IJium to the mixed liquid corresponding to each number of drops! The concentration is 1 drop of 0. O5p
After removing pm, [0,05X (number of drops - Q, 05
)] ppm. Table 2 shows the results obtained using three panelists.

Odors caused by chlorella powder are deodorized by sodium sulfite. Performing a linear regression analysis with the test solution concentration multiplier set as
6 (R==0.9610).

Example 3 An experiment similar to Example 2 was conducted using a series of concentration series of odorized liquids obtained by dissolving dry powder of brewer's yeast extract in ice cubes as test liquids. The results are shown in Table '4S3.

Odors caused by yeast extract powder are also deodorized by sodium sulfite. Test solution concentration magnification is X, sulfite required for deodorization
-1) Linear regression analysis with rum addition concentration as Y,
Y:Q, 215X-0,104 (R==Q, 9920)
It is.

Example 4 According to the 2e++ chelating ability measured in advance, aqueous solutions of various chelating agents with concentrations shown in Table 4 were prepared and used as samples for deodorizing metallic air.

Ferrous sulfate 71-1.05.00 mQ was dissolved in purified water to make 1 liter, and this solution was further diluted 100 times with purified water, and the solution was used as a gold test solution. This metal test liquid is Fe″
' to 12. . Contains a very strong metallic feel.

Add 1 drop, 2 drops, and 3 drops of the metal deodorizing sample to 180 ml of metal test solution using a dropper bottle adjusted to 1 drop at 50 m, shake it up, let it stand for at least 5 minutes, and then pour the mixture into your mouth. The level of metal qi is sensually tested, and the metal qi reduction effect is 0 points with no effect,
The 5th score is the result determined using the 5-point method in which 5 points are given to the complete disappearance of metallic energy.
Shown in the table.

G) BSodium connate is not a good result, and this is partly due to the off-taste of gluconic acid. To summarize, Gyrate 41 has excellent ability to eliminate metal energy, and citric acid is particularly effective.

Example 5 1.5 g of sodium citrate and flIlfi II
) Dissolve 10y of sodium in purified water that is sterilized by boiling,
00mt is used as a drinking water deodorizing agent, and one drop is filled into a dropper bottle adjusted to 5QMf. Collect tap water from six cities that are said to have various odors, add 1.8 g of each to 1.8 g of this drinking water, add 10 drops of brominating agent, mix together, and compare the taste of the water before and after the addition. The results of the study are shown in Table 6.

Example 6 15g of sodium citrate, 1oy of sodium sulfite and 50% of D-xylose are mixed uniformly. Separately, take 25 y'Q of urea, gently heat it to about 130 ml, melt it, add this molten cocooned urea to the previously mixed rice, let it cool and knead it, and after cooling, pass through a 20 mesh mesh. The mixture is made into granules and compressed into 50 mq tablets to obtain a tablet-shaped drinking water deodorizer.

Claims (3)

[Claims] (1) Drinks containing as essential ingredients one or more chelating agents selected from the group consisting of citrate, gluconate, phosphate, polyphosphate and phytate, and sulfite. Water deodorizer. (2) The drinking water deodorizing agent according to claim 1, wherein the total amount of the chelating agent contained in a single dose per liter of drinking water is 0.01 to 0.1 meq. (3) The drinking water deodorizing agent according to claim 1, wherein the amount of sulfite contained in a single dose per liter of drinking water is 0.008 to 0.16 meq.