Preparation method of liquid salt solution

Abstract

The invention discloses a preparation method of a liquid salt solution, and relates to the technical field of inorganic salt, and the preparation method comprises the following steps: S1, adding rock salt into alkaline ionized water, adjusting the mass concentration of NaCl, and uniformly mixing to obtain a rock salt solution; s2, the rock salt solution is sequentially subjected to multi-stage filtration and activated carbon treatment; s3, performing ultraviolet sterilization on the rock salt solution to obtain a liquid salt solution. The preparation process is simple and reliable, the prepared liquid salt solution can reduce the content of sodium without changing the salt taste, the shelf life can be prolonged, and the chemical stability and the microbial stability are good; the applicability is high, the concentration of NaCl can be adjusted according to requirements, and the edible and medical use requirements are met.

Description

Technical Field

[0001] The present invention relates to the technical field of inorganic salts, and in particular to a method for preparing a liquid salt solution. Background Art

[0002] Currently, edible salt is usually granular salt. However, granular salt is difficult to evenly distribute on food. To obtain a uniform salty taste, more salt usually needs to be added. Since the liquid salt solution dissolves salt in a solvent, the intensity of the salty taste is different from that of solid salt. The solvent helps to release the salt into the mouth faster and more evenly, improving the taste without a large amount of NaCl, and the salt solution can be distributed on food more evenly and quickly, reducing the need to use a large amount of salt. Therefore, in the food industry, compared with solid salt, a liquid salt solution with a low sodium content is more suitable for individuals suffering from diseases such as hypertension and kidney disease. In addition, the liquid salt solution can also be used as physiological saline in the pharmaceutical industry. However, the current liquid salt solutions usually have poor stability, insufficient flavor perception, and obvious limitations in the preparation process. Traditional liquid salt solutions usually need to be extracted from seawater, which requires evaporating water under long-term sunlight irradiation and is prone to organic matter degradation.

[0003] Therefore, there is an urgent need for a method for preparing a liquid salt solution that can maintain the organic characteristics of water, taking into account low sodium, high salt taste perception, and stability. Summary of the Invention

[0004] In order to solve the above problems existing in the prior art, the purpose of the present invention is to provide a method for preparing a liquid salt solution. It can maintain its salty taste while reducing the sodium usage, has strong applicability, high microbial safety, strong chemical stability, and a long shelf life, and is applicable to the food and pharmaceutical fields.

[0005] The present invention provides the following technical solutions:

[0006] The present invention provides a method for preparing a liquid salt solution, which includes the following steps:

[0007] S1. Add rock salt to alkaline ion water and adjust the mass concentration of the rock salt. After mixing evenly, a rock salt solution is obtained;

[0008] S2. Subject the rock salt solution to multi-stage filtration and activated carbon treatment in sequence;

[0009] S3. Sterilize the rock salt solution by ultraviolet rays to obtain the liquid salt solution; the wavelength range of the ultraviolet sterilization is 240 - 280 nm.

[0010] Preferably, in the step S1, a Venturi system is used to introduce the rock salt to ensure uniform dissolution.

[0011] Further, the pH of the alkaline ion water is 8.0 - 9.0.

[0012] Preferably, the pH of the alkaline ionized water is 8.5 - 9.0.

[0013] Furthermore, the oxidation-reduction potential of the alkaline ionized water ranges from -100 mV to -400 mV.

[0014] Furthermore, the alkaline ionized water is prepared by ionizing water, and the electrolysis parameters are: voltage of 3 - 12 V, current of 0.5 - 5 A, and electrolysis time of 0.5 - 5 min.

[0015] Furthermore, the method for preparing the alkaline ionized water includes the following steps:

[0016] (1) Extract raw water through a membrane pump and filter it using a 50 μm filter mesh.

[0017] (2) Conduct chemical and microbial analyses on the filtered water.

[0018] (3) Electrolyze the water according to the electrolysis parameters, and separate the alkaline ionized water from the acidic ionized water using a semi-permeable membrane, continuously monitor the pH value and oxidation-reduction potential (ORP) of the alkaline ionized water.

[0019] Furthermore, the multi-stage filtration is to filter the rock salt solution successively through filter membranes of 20 μm, 10 μm, and 1 μm.

[0020] Furthermore, the irradiation dose of the ultraviolet sterilization is 30 - 40 mJ / cm 2 .

[0021] Preferably, the wavelength of the ultraviolet sterilization is 254 nm.

[0022] Preferably, the liquid salt solution is an edible liquid salt solution. In S1, rock salt is added to the rock salt solution, and the mass percentage of NaCl is 25%.

[0023] Preferably, the liquid salt solution is an isotonic medical saline solution. In S1, rock salt is added to the rock salt solution, and the mass concentration of NaCl is 0.9%.

[0024] Preferably, the liquid salt solution is a hypertonic medical saline solution. In S1, rock salt is added to the rock salt solution, and the mass concentration of NaCl is greater than 0.9%.

[0025] Preferably, the liquid salt solution is a hypotonic medical saline solution. In S1, rock salt is added to the rock salt solution, and the mass concentration of NaCl is less than 0.9%.

[0026] Through the above scheme design, the present invention has the following effects:

[0027] The present invention uses alkaline ionized water to dissolve rock salt to prepare a liquid salt solution, which can enhance the perception of saltiness, significantly reduce the sodium content, ensure the stability of the liquid salt solution, and the rock salt contains minerals, which can enrich the taste of the liquid salt solution and help reduce the "aggressiveness" of salt. At the same time, multi-stage filtration and activated carbon treatment are adopted, combined with ultraviolet sterilization technology, to carry out unified sterilization throughout the production process. Without introducing redundant chemical agents, impurities can be effectively removed, and specific organic substances or pollutants that may change the quality and stability of the salt solution can be eliminated, thereby ensuring high purity; bacteria and viruses can be effectively eliminated without changing the organic characteristics of the liquid salt solution, maintaining microbial stability.

[0028] In addition, the present invention can also adjust the content of NaCl in the rock salt according to the usage requirements, which can not only meet the edible requirements but also be applicable to the medical field. The preparation process of the present invention is simple and reliable, making it possible to prepare a salt solution that maintains saltiness, reduces the sodium content, extends the shelf life, is conducive to preservation, and optimizes the effectiveness of the final product. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 It is a chemical stability diagram of the liquid salt solution provided by the present invention over time. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will combine the embodiments of the present invention to clearly and completely describe the technical solutions of the present invention. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0032] It should be understood that when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0033] It should also be understood that the terms used in the specification of the present invention are merely for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly dictates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0034] It should be further understood that the term "and / or" used in the specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0035] Example 1

[0036] A method for preparing a liquid salt solution, comprising the following steps:

[0037] S1. Extract raw water through a membrane pump and filter it using a 50 μm filter screen;

[0038] S2. Conduct chemical and microbial analyses on the filtered water;

[0039] S3. Electrolyze the water according to the electrolysis parameters (voltage 6V, current 2.5A, electrolysis time 3 min), and use a semi-permeable membrane to separate the alkaline ion water from the acidic ionized water. Continuously monitor the pH value and oxidation-reduction potential (ORP) of the alkaline ion water, and maintain its pH value at 8 and the ORP at -400 mV.

[0040] S4. Add rock salt to the alkaline ion water and adjust the mass concentration of NaCl to 25%, and obtain a rock salt solution after mixing evenly;

[0041] S5. Pass the rock salt solution through filter membranes with pore sizes of 20 μm, 10 μm, and 1 μm in sequence for multi-stage filtration and activated carbon treatment to remove the residual chemical substances in the rock salt solution;

[0042] S6. Sterilize the rock salt solution by ultraviolet light to obtain the liquid salt solution; the wavelength of the ultraviolet sterilization is 254 nm, and the irradiation dose is 40 mJ / cm 2 .

[0043] Example 2

[0044] A method for preparing a liquid salt solution, comprising the following steps:

[0045] S1. Extract raw water through a membrane pump and filter it using a 50 μm filter screen;

[0046] S2. Conduct chemical and microbial analyses on the filtered water;

[0047] S3. Electrolyze water according to the electrolysis parameters (voltage 12V, current 5A, electrolysis time 1 min), and use a semi-permeable membrane to separate alkaline ionized water from acidic ionized water. Continuously monitor the pH value and oxidation-reduction potential (ORP) of the alkaline ionized water, and maintain its pH value at 8.5 and ORP at -400 mV.

[0048] S4. Add rock salt to the alkaline ionized water and adjust the mass concentration of NaCl to 0.9%, and obtain a rock salt solution after mixing evenly.

[0049] S5. Pass the rock salt solution through filter membranes of 20 μm, 10 μm, and 1 μm in sequence for multi-stage filtration and activated carbon treatment to remove residual chemical substances in the rock salt solution.

[0050] S6. Sterilize the rock salt solution by ultraviolet light to obtain a liquid salt solution; the wavelength of ultraviolet sterilization is 254 nm, and the irradiation dose is 35 mJ / cm 2 。

[0051] Example 3

[0052] A method for preparing a liquid salt solution, comprising the following steps:

[0053] S1. Extract raw water through a membrane pump and filter it using a 50-μm filter mesh.

[0054] S2. Conduct chemical and microbial analysis on the filtered water.

[0055] S3. Electrolyze water according to the electrolysis parameters (voltage 6V, current 3A, electrolysis time 0.5 min), and use a semi-permeable membrane to separate alkaline ionized water from acidic ionized water. Continuously monitor the pH value and oxidation-reduction potential (ORP) of the alkaline ionized water, and maintain its pH value at 8.5 and ORP at -300 mV.

[0056] S4. Add rock salt to the alkaline ionized water and adjust the mass concentration of NaCl to 25%, and obtain a rock salt solution after mixing evenly.

[0057] S5. Pass the rock salt solution through filter membranes of 20 μm, 10 μm, and 1 μm in sequence for multi-stage filtration and activated carbon treatment to remove residual chemical substances in the rock salt solution.

[0058] S6. Sterilize the rock salt solution by ultraviolet light to obtain a liquid salt solution; the wavelength of ultraviolet sterilization is 240 nm, and the irradiation dose is 35 mJ / cm 2 。

[0059] Example 4

[0060] A method for preparing a liquid salt solution, comprising the following steps:

[0061] S1 extracts raw water through a membrane pump and filters it using a 50-μm filter mesh;

[0062] S2, conducts chemical and microbiological analyses on the filtered water;

[0063] S3, electrolyzes the water according to the electrolysis parameters (voltage 3V, current 0.5A, electrolysis time 5 min), and uses a semi-permeable membrane to separate the alkaline ionized water from the acidic ionized water. Continuously monitors the pH value and oxidation-reduction potential (ORP) of the alkaline ionized water, and maintains its pH value at 9 and ORP at -100 mV.

[0064] S4, adds rock salt to the alkaline ionized water and adjusts the mass concentration of NaCl to 25%, and obtains a rock salt solution after mixing evenly;

[0065] S5, sequentially passes the rock salt solution through filter membranes of 20 μm, 10 μm, and 1 μm for multi-stage filtration and activated carbon treatment to remove residual chemical substances in the rock salt solution;

[0066] S6, conducts ultraviolet sterilization on the rock salt solution to obtain a liquid salt solution; the wavelength of the ultraviolet sterilization is 280 nm, and the irradiation dose is 30 mJ / cm 2 .

[0067] To illustrate the technical effects of the present invention, the following tests are conducted on the above Examples 1-4.

[0068] (1) Flavor perception and sodium reduction effect test

[0069] On the basis of Example 1, Comparative Example 1 is set as follows:

[0070] Comparative Example 1

[0071] The difference between this comparative example and Example 1 is only that the water is not electrolyzed, that is, non-electrolyzed water is used as the solvent.

[0072] The flavor perception and sodium reduction effect tests are conducted on Example 1, Comparative Example 1, and commercially available granular salt (NaCl purity ≥ 97%, particle size ≤ 500 μm) with the same NaCl dose. The test methods and standards are as follows:

[0073] Use Example 1, Comparative Example 1, and commercially available granular salt to season the same type and same dose of food, and set multiple groups of different foods to increase universality. Use 30 healthy adults without taste disorders and who have fasted from irritating foods before the test to evaluate the saltiness of the seasoned food.

[0074] Taking the saltiness intensity of the food after seasoning with 2.5 g of commercially available granular salt as the standard (9 points), the addition amounts of the liquid salt solutions in Example 1 and Comparative Example 1 were adjusted, and the minimum addition amounts of the liquid salt solutions in Example 1 and Comparative Example 1 were recorded when their saltiness scores were consistent with those of the granular salt group (target: score difference ≤ 0.5 points). The test results are shown in Table 1 below:

[0075] Table 1 Flavor Perception and Sodium Reduction Effect Test

[0076] Saltiness score Addition amount of salt / salt solution Example 1 9 70g Comparative Example 1 9 82g Commercially available granular salt 9 2.5g

[0077] As shown in Table 1, when the salt perception in Example 1 was to be basically the same as that of 2.5 g of commercially available granular salt, the addition amount of the liquid salt solution prepared in Example 1 was 70 g, that is, the corresponding NaCl addition amount was 1.75 g; the addition amount of the liquid salt solution prepared in Comparative Example 1 was 82, and the corresponding NaCl addition amount was 2.05 g. That is, when Example 1, Comparative Example 1, and commercially available salt particles were to maintain basically the same saltiness, the mass content of sodium in Example 1 could be reduced by 30%, while in Comparative Example 1, due to the lack of ionization treatment of water, the sodium ion release efficiency was low. Therefore, compared with Example 1, the mass content of sodium in Comparative Example 1 was only reduced by 18%. Therefore, the present invention uses alkaline ionized water to prepare a liquid salt solution, which can significantly reduce the sodium usage while retaining the salt flavor perception.

[0078] (2) Microbial Stability Test

[0079] Based on Example 2, Comparative Example 2 and Comparative Example 3 were set as follows:

[0080] Comparative Example 2

[0081] The difference between this comparative example and Example 2 was only that ultraviolet sterilization treatment was not carried out.

[0082] Comparative Example 3

[0083] The difference between this comparative example and Example 2 was only that multi-stage filtration and ultraviolet sterilization treatment were not carried out.

[0084] The colony counts of the liquid salt solutions prepared in Example 2, Comparative Example 2, and Comparative Example 3 were tested respectively after being sealed and stored at room temperature for 0 days, 7 days, 14 days, and 30 days. The test results are shown in Table 2 below:

[0085] Table 2 Microbial Stability Test Results

[0086] Storage time 0 days 7 days 14 days 30 days Example 2 0 CFU / ml 0 CFU / ml 0 CFU / ml 0 CFU / ml Comparative Example 2 0 CFU / ml 50 CFU / ml 500 CFU / ml 5000 CFU / ml Comparative Example 3 100 CFU / ml 5000 CFU / ml <![CDATA[1×10 5 CFU / ml]]> <![CDATA[1×10 6 CFU / ml]]>

[0087] As shown in Table 2, there was no bacterial growth in the liquid salt solution of Example 2 after being placed at room temperature for 30 days. Mild contamination occurred in the liquid salt solution of Comparative Example 2 after being placed at room temperature for 14 days, and bacterial growth was significantly observed in the liquid salt solution of Comparative Example 3 after being placed for 7 days. Therefore, the present invention can effectively control bacterial growth and maintain microbial stability through multi-stage filtration and ultraviolet sterilization.

[0088] (3) Chemical stability and corrosion tests

[0089] Based on Example 3, Comparative Example 4 and Comparative Example 5 are set as follows:

[0090] Comparative Example 4

[0091] The difference between this comparative example and Example 3 is only that neutral un-ionized water with a pH of 7 is used to replace the alkaline ion water as the solvent for the rock salt.

[0092] Comparative Example 5

[0093] The difference between this comparative example and Example 3 is only that acidic ionized water with a pH of 5 is used to replace the alkaline ion water as the solvent for the rock salt.

[0094] The liquid salt solutions of Example 3, Comparative Example 4 and Comparative Example 5 were canned in transparent glass containers, and then their solution stabilities were observed after being placed at room temperature for 0 months, 1 month, 2 months and 3 months. The stability conditions are as Figure 1 shown; the liquid salt solutions of Example 3, Comparative Example 4 and Comparative Example 5 were canned in metal containers, and the corrosion conditions of the containers were observed after being placed at room temperature for 0 months, 1 month, 2 months and 3 months. The test results are shown in Table 3 below:

[0095] Table 3 Chemical stability and corrosion test results

[0096]

[0097] As Figure 1 and shown in Table 3, when neutral water without ionization and pH adjustment is used as the solvent, the stability of the liquid salt solution is poor, and precipitation occurs after being stored at room temperature for one month; while for acidic ionized water, obvious precipitation occurs after being stored for only one month, and there is an easy corrosion risk. Corrosion occurs after being stored in a metal container for 2 months, thus affecting the taste and composition of the liquid salt solution.

[0098] In summary, the present invention uses alkaline ion water as the solvent, which can enhance the perception of saltiness, significantly reduce the sodium content and ensure the stability of the liquid salt solution; at the same time, through multi-stage filtration and activated carbon treatment, combined with ultraviolet sterilization technology, impurities can be removed to ensure high purity, bacteria and viruses can be effectively eliminated, and microbial stability can be maintained.

[0099] As described above, it is only the specific implementation manner of the present invention. However, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for preparing a liquid salt solution, characterized in that, It includes the following steps: S1. Add rock salt to alkaline ionized water and adjust the mass concentration of NaCl. After mixing evenly, a rock salt solution is obtained; S2. Perform multi-stage filtration and activated carbon treatment on the rock salt solution in sequence; S3. Perform ultraviolet sterilization on the rock salt solution to obtain a liquid salt solution; the wavelength range of the ultraviolet sterilization is 240 - 280 nm.

2. The preparation method of the liquid salt solution according to claim 1, characterized in that, The pH of the alkaline ionized water is 8.0 - 9.

0.

3. The preparation method of the liquid salt solution according to claim 2, wherein, The pH of the alkaline ionized water is 8.5 - 9.

0.

4. The preparation method of the liquid salt solution according to claim 1, wherein, The redox potential of the alkaline ionized water is between -100 mV and -400 mV.

5. The preparation method of the liquid salt solution according to claim 1, characterized in that, The alkaline ionized water is prepared by ionizing water, and the parameters of the electrolysis are: voltage 3 - 12 V, current 0.5 - 5 A, and electrolysis time 0.5 - 5 min.

6. The preparation method of the liquid salt solution according to claim 1, characterized in that, The multi-stage filtration is to filter the rock salt solution through filter membranes with pore sizes of 20 μm, 10 μm, and 1 μm in sequence.

7. The preparation method of the liquid salt solution according to claim 1, characterized in that, The irradiation dose of the ultraviolet sterilization is 30 - 40 mJ / cm 2 .

8. The preparation method of the liquid salt solution according to claim 7, characterized in that, The wavelength of the ultraviolet sterilization is 254 nm.

9. The method for preparing a liquid salt solution according to claim 1, wherein The liquid salt solution is an edible liquid salt solution. In S1, the mass percentage of added rock salt in the rock salt solution is 25%.

10. The preparation method of the liquid salt solution according to claim 1, characterized in that, The liquid salt solution is a medical physiological saline. In S1, the mass concentration of added rock salt in the rock salt solution is 0.9%.

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