Preparation method of bean sprouts capable of efficiently enriching organic selenium

Abstract

The invention discloses a preparation method of bean sprouts capable of efficiently enriching organic selenium, and belongs to the technical field of food production. The method comprises the following steps: (1) preparing a selenium-rich soaking solution, namely preparing a selenium solution with the concentration of 0.015-0.06 mmol / L by taking selenomethionine as a selenium source; (2) bean selection: selecting mung beans which are bright in color, full, undamaged, free of plant diseases and insect pests and suitable for germination; (3) selenium solution soaking: putting the selected high-quality mung beans into an organic selenium solution, and soaking under a dark condition; (4) germination culture: washing the soaked mung beans, and spreading the mung beans on a tray covered with gauze in a single layer; spraying sterilized distilled water once at set intervals in the germination process; and taking out the bean sprout seedlings after the bean sprout seedlings grow for 72-84 hours, and washing the bean sprout seedlings with clear water to obtain the selenium-rich bean sprout. The method is efficient and safe, can directionally produce the bean sprouts with high organic selenium content, and is suitable for popularization and application.

Description

Technical Field

[0001] This invention belongs to the field of food processing technology and relates to a method for preparing bean sprouts with high organic selenium content through efficient enrichment of organic selenium. Specifically, it relates to a production method for preparing bean sprouts with high organic selenium content based on soaking in an organic selenium solution. Background Technology

[0002] Bean sprouts are a common vegetable, rich in vitamins, dietary fiber, and plant protein, making them highly nutritious and easily digestible. Given the increasing demand for healthy eating, improving the micronutrient content of bean sprouts and developing functional bean sprout products is of significant value.

[0003] Selenium is an essential trace element for the human body, possessing various important physiological functions such as anti-oxidation, immune enhancement, and anti-cancer properties. The human body primarily obtains selenium through diet, and the content and form of selenium in food directly determine its bioavailability and safety. Organic selenium, especially selenoamino acids, has higher absorption efficiency, lower toxicity, and better biological activity compared to inorganic selenium.

[0004] Existing methods for producing selenium-enriched bean sprouts mainly involve soaking or spraying with inorganic selenium solutions such as sodium selenite. While this method can increase the total selenium content of bean sprouts, it has significant drawbacks: First, the absorption and conversion efficiency of inorganic selenium in bean sprouts is relatively low, resulting in limited total selenium accumulation; second, the ratio of inorganic selenium to organic selenium within the bean sprout is unstable, potentially leading to inorganic selenium residues in the product and posing a potential food safety risk; third, the form and composition of organic selenium in the resulting bean sprouts are unclear, making it difficult to quantify its nutritional value.

[0005] There is an urgent need for an efficient, safe, and controllable method to produce bean sprouts with high organic selenium content. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies, this invention provides a method for preparing bean sprouts with high organic selenium enrichment. This method is an efficient, safe, and controllable way to produce bean sprouts with high organic selenium content. The bean sprouts produced are rich in organic selenium, which is beneficial to human health and nutritional intake after consumption, and is suitable for widespread application.

[0007] The technical solution is as follows:

[0008] This invention provides a method for preparing bean sprouts with high efficiency enrichment of organic selenium, comprising the following steps:

[0009] Step 1: Prepare selenium-enriched soaking solution: Prepare a selenomethionine soaking solution with a concentration of 0.015–0.06 mmol / L;

[0010] Step 2, Selecting Beans: Choose mung beans that are bright in color, plump and undamaged, free from pests and diseases, and suitable for germination;

[0011] Step 3, Selenium solution soaking: Place the mung beans selected in Step 2 into an organic selenium solution and soak for 9-12 hours in the dark, with the temperature controlled at 25℃-30℃;

[0012] Step 4, Sprouting: After soaking, rinse the mung beans and spread them in a single layer on a tray covered with gauze. During the sprouting process, keep the room temperature between 25℃ and 30℃ and spray with sterilized distilled water every 8-10 hours. The bean sprouts can be taken out after 72-84 hours and rinsed with clean water to obtain selenium-enriched bean sprouts.

[0013] Furthermore, the selenium-enriched soaking solution in step 1 is a 0.06 mmol / L selenomethionine solution, the soaking process lasts for 9 hours, and the selenium-enriched soaking temperature is 25℃; the room temperature is controlled at 25℃ during the germination process, and sterile distilled water is sprayed every 8 hours. The bean sprouts are taken out after 72 hours.

[0014] Furthermore, the selenium-enriched bean sprouts contain 5.626-25.382 mg / kg of organic selenium.

[0015] Furthermore, the selenium-enriched bean sprouts contain 4.514-22.760 mg / kg of selenomethionine.

[0016] Furthermore, the selenium-enriched bean sprouts contain 0.846-1.362% inorganic selenium residue.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] The method for producing high-organic-selenium bean sprouts provided by this invention directly uses organic selenium compounds to prepare the soaking solution, enabling beans to efficiently absorb selenium in the early stages of germination. Selecting high-quality mung beans helps improve the germination rate. Controlling the concentration, time, and temperature of the soaking solution not only ensures the normal growth of the bean sprouts but also significantly increases the accumulation and conversion rate of organic selenium in the sprouts. The organic selenium conversion rate of the produced bean sprouts remains consistently high, and the main selenium form is selenoamino acids with better bioavailability. The method for producing high-organic-selenium bean sprouts provided by this invention is simple, cost-controllable, and produces bean sprouts with a clear selenium fortification effect and high food safety, showing promising prospects for widespread application. Detailed Implementation

[0019] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0020] Example 1

[0021] The production method of organic selenium-enriched bean sprouts includes the following steps: (1) Preparation of selenium-enriched soaking solution: using selenomethionine as the selenium source, prepare a selenium solution with a concentration of 0.015 mmol / L; (2) Selection of beans: select mung beans that are bright in color, plump and undamaged, free from pests and diseases, and suitable for germination; (3) Selenium solution soaking: place the selected high-quality mung beans in an organic selenium solution and soak them for 9 hours under light-proof conditions; (4) Germination culture: after soaking, rinse the mung beans and spread them in a single layer on a tray covered with gauze; during the germination process, the room temperature is controlled at 25℃, and the beans are sprayed with sterilized distilled water once every 8 hours; the bean sprouts can be taken out after 72 hours and rinsed with clean water to obtain selenium-enriched bean sprouts.

[0022] Example 2

[0023] The production method of organic selenium-enriched bean sprouts includes the following steps: (1) Preparation of selenium-enriched soaking solution: using selenomethionine as the selenium source, prepare a selenium solution with a concentration of 0.06 mmol / L; (2) Selection of beans: select mung beans that are bright in color, plump and undamaged, free from pests and diseases, and suitable for germination; (3) Soaking in selenium solution: place the selected high-quality mung beans in an organic selenium solution and soak them for 9 hours under light-proof conditions; (4) Germination culture: after soaking, rinse the mung beans and spread them in a single layer on a tray covered with gauze; during the germination process, the room temperature is controlled at 25℃, and the beans are sprayed with sterilized distilled water once every 8 hours; the bean sprouts can be taken out after 72 hours and rinsed with clean water to obtain selenium-enriched bean sprouts.

[0024] Control group 1

[0025] Select mung beans that are bright in color, plump and undamaged, free from pests and diseases, and suitable for germination; place the selected high-quality mung beans in a 0.015 mmol / L sodium selenite solution and soak them for 9 hours in the dark; after soaking, rinse the mung beans and spread them in a single layer on a tray covered with gauze; during the germination process, control the room temperature at 25℃ and spray them with sterilized distilled water every 8 hours; after the bean sprouts have grown for 72 hours, they can be taken out and rinsed with clean water to obtain selenium-enriched bean sprouts.

[0026] Control group 2

[0027] Select mung beans that are bright in color, plump and undamaged, free from pests and diseases, and suitable for germination; place the selected high-quality mung beans in clean water and soak them for 9 hours in the dark; after soaking, rinse the mung beans and spread them in a single layer on a tray covered with gauze; during the germination process, control the room temperature at 25℃ and spray them with sterilized distilled water every 8 hours; after the bean sprouts have grown for 72 hours, they can be taken out and rinsed with clean water to obtain selenium-enriched bean sprouts.

[0028] The contents of organic selenium and selenoamino acids in the bean sprouts produced in the embodiments of the present invention were compared with those in the control group. The results are shown in Table 1.

[0029]

[0030] Total selenium content in bean sprout production (mg / kg): Example 1: 5.674; Example 2: 25.732; Control group 1: 1.371; Control group 2: 0.0323.

[0031] Organic selenium content in bean sprout production (mg / kg): Example 1: 5.626; Example 2: 25.382; Control group 1: 1.356; Control group 2: 0.031.

[0032] Selenomethionine content in bean sprouts (mg / kg): Example 1: 4.514; Example 2: 22.760; Control group: 10.317; Control group 2: Not detected.

[0033] Selenocysteine ​​content in bean sprouts (mg / kg): Example 1: 0.541; Example 2: 0.937; Control group 1: 0.616; Control group 2: Not detected.

[0034] Methylselenocysteine ​​content in bean sprouts (mg / kg): Example 1: 0.177; Example 2: 0.310; Control group 1: 0.302; Control group 2: Not detected.

[0035] Total inorganic selenium residue rate in bean sprout production (%) Example 1 0.846 Example 2 1.362 Control group 1 1.104 Control group 2 3.432.

[0036] The results showed that the content of organic selenium and selenoamino acids in the bean sprouts produced in the embodiments of the present invention was significantly higher than that in the control group.

[0037] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. A method for preparing bean sprouts with high efficiency enrichment of organic selenium, characterized in that, Includes the following steps: Step 1: Prepare selenium-enriched soaking solution: Prepare a selenomethionine soaking solution with a concentration of 0.015–0.06 mmol / L; Step 2, Selecting Beans: Choose mung beans that are bright in color, plump and undamaged, free from pests and diseases, and suitable for germination; Step 3, Selenium solution soaking: Place the mung beans selected in Step 2 into an organic selenium solution and soak for 9-12 hours in the dark, with the temperature controlled at 25℃-30℃; Step 4, Sprouting: After soaking, rinse the mung beans and spread them in a single layer on a tray covered with gauze. During the sprouting process, the room temperature should be controlled at 25℃-30℃, and the beans should be sprayed with sterilized distilled water every 8-10 hours. When the bean sprouts have grown to 72-84 hours, take them out and rinse them with clean water to obtain selenium-enriched bean sprouts.

2. The method according to claim 1, characterized in that, In step 1, the selenium-enriched soaking solution is a selenomethionine solution with a concentration of 0.06 mmol / L.

3. The method according to claim 1, characterized in that, In step 3, soak for 9 hours at a temperature of 25°C.

4. The method according to claim 1, characterized in that, In step 4, the germination process is carried out at a room temperature of 25°C, and sterilized distilled water is sprayed every 8 hours.

5. The method according to claim 1, characterized in that, In step 4, the bean sprouts are taken out after 72 hours.

6. The method according to claim 1, characterized in that, In step 4, the selenium-enriched bean sprouts contain 5.626-25.382 mg / kg of organic selenium.

7. The method according to claim 1, characterized in that, In step 4, the selenium-enriched bean sprouts contain 4.514-22.760 mg / kg of selenomethionine.

8. The method according to claim 1, characterized in that, In step 4, the selenium-enriched bean sprouts contain 0.846-1.362% inorganic selenium residue.

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