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Technology for extracting selenium from tea leaves

A technology of tea extraction and tea, which is applied in the technical field of extracting selenium from tea, can solve the problems of low extraction efficiency, complex selenium process, unfavorable production, etc., and achieve the effect of simple preparation process, environmental friendliness and high production efficiency

Inactive Publication Date: 2019-08-23
浙江山海堂药业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing process for extracting selenium from tea leaves is complicated, and the extraction efficiency is low, which is not conducive to people's production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of technique that extracts selenium from tealeaves, concrete steps are as follows:

[0020] Step 1: Remove old leaves, old stalks, damaged parts, mildewed parts and non-tea objects from the tea leaves, wash the tea leaves with clean water, soak them in an ethanol solution with a mass fraction of 68% for 12 hours, and then put them in an Wash off the ethanol solution in bacterial water and drain it, then wash the tea leaves with sterile water, and set aside, the impurities and bacteria on the tea leaves can be completely removed;

[0021] Step 2, pulverizing the tea leaves in step 1 to a particle size of 6mm, and then subjecting the pulverized tea leaves to degreasing treatment to remove fat to obtain defatted tea leaves;

[0022] Step 3, enzymatically hydrolyzing the degreased tea leaves to obtain a tea enzymatic hydrolyzate, mixing the tea enzymatic hydrolyzate with a solvent 4 times its weight, the solvent including ethanol, ether and ice acetone with a volume ...

Embodiment 2

[0025] A kind of technique that extracts selenium from tealeaves, concrete steps are as follows:

[0026] Step 1: Remove old leaves, old stalks, damaged parts, mildewed parts and non-tea objects from the tea leaves, wash the tea leaves with clean water, soak them in an ethanol solution with a mass fraction of 72% for 13 hours, and then put them in an Wash off the ethanol solution in bacterial water and drain it, then wash the tea leaves with sterile water, and set aside, the impurities and bacteria on the tea leaves can be completely removed;

[0027] Step 2, freezing and crushing the tea leaves in step 1 at minus 22 degrees Celsius to a particle size of 8 mm, and then subjecting the pulverized tea leaves to degreasing treatment to remove fat to obtain defatted tea leaves;

[0028] Step 3, enzymatically hydrolyzing the degreased tea leaves to obtain a tea enzymatic hydrolyzate, mixing the tea enzymatic hydrolyzate with a solvent 4 times its weight, the solvent including ethano...

Embodiment 3

[0031] A kind of technique that extracts selenium from tealeaves, concrete steps are as follows:

[0032] Step 1: Remove old leaves, old stalks, damaged parts, mildewed parts and non-tea objects from the tea leaves, wash the tea leaves with clean water, soak them in an ethanol solution with a mass fraction of 75% for 13 hours, and then put them in an Wash off the ethanol solution in bacterial water and drain it, then wash the tea leaves with sterile water, and set aside, the impurities and bacteria on the tea leaves can be completely removed;

[0033] Step 2, pulverizing the tea leaves in step 1 to a particle size of 10 mm, and then subjecting the pulverized tea leaves to degreasing treatment to remove fat to obtain defatted tea leaves;

[0034] Step 3: enzymatically hydrolyze the degreased tea leaves to obtain a tea enzymatic solution, mix the tea enzymatic solution with a solvent 3-5 times its weight, the solvent includes ethanol, ether and ice in a volume ratio of 1:1:1 Ac...

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Abstract

The invention discloses a technology for extracting selenium from tea leaves. The technology comprises the following specific steps that step one, the tea leaves are subjected to impurity removal, soaked in an ethanol solution for 10-15 hours, then put in sterile water for being washed, drained thoroughly and washed with sterile water once again; step two, the tea leaves in the step one are smashed, and then the smashed tea leaves are ungreased; step three, the ungreased tea leaves are subjected to enzymolysis, tea leaf enzymolysis liquid is obtained and mixed with a solvent with the weight 3-5 times larger than that of the enzymolysis liquid, stirring is conducted at 65-80 DEG C until the solvent is volatilized completely, then the mixture is precipitated under the ultrasonic oscillatingcondition, a precipitate is subjected to pressure filtration in a filtering membrane, and a filtration product is obtained; step four, the filtration product is subjected to microwave drying, and thefinished product can be obtained. The preparation technology is simple, simple in operation, easy to implement, friendly to the environment, free of pollution and high in production efficiency, the prepared organic selenium contains few impurities, a large amount of selenium can be safely absorbed by the human body, and therefore the problem of the selenium deficiency of people is solved.

Description

technical field [0001] The invention relates to the field of tea, in particular to a process for extracting selenium from tea. Background technique [0002] Selenium is one of the essential trace elements for the human body. Selenium deficiency can cause many diseases. Selenium has the functions of anti-cancer, anti-oxidation, enhancing human immunity, anti-heavy metal, regulating vitamin absorption and protein synthesis. Modern medical research has proved that selenium It has preventive effects on cancer, cardiovascular and cerebrovascular diseases, Keshan disease, Kashin-Beck disease and other diseases. Experiments have shown that the absorption rate of plant organic selenium by the human body is 25 times that of inorganic selenium. Directly using inorganic selenium salts to supplement selenium has certain toxicity. Supplementing selenium through the food chain is an important way to solve the problem of selenium deficiency, but the selenium content in natural foods is com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23F3/16A23F3/18
CPCA23F3/166A23F3/18
Inventor 吴慧斌吴中中黄芳芳吴骋李军曾得昌
Owner 浙江山海堂药业有限责任公司
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