Selenium-enriched nano-tea and processing method thereof
A technology for selenium-enriched tea and selenium-enriched tea is applied in the field of tea processing, which can solve the problems of low intake of selenium element, low utilization rate of selenium element, and high production cost of selenium-enriched tea, and achieves an increase in organic selenium content, an increase in content, and a reduction in organic selenium content. The effect of production costs
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Embodiment 1
[0043] A kind of selenium-enriched nano tea, the preparation process of said selenium-enriched tea is as follows:
[0044] Pick fresh tea leaves; pile the tea leaves into a pile of 8 cm high, and sterilize them with steam at 99°C for 3 minutes; mix the sterilized tea leaves with the selenium-enriched fermentation bacteria cultivated in cultivation method 1, pile them into a pile of tea piles with a height of 75 cm, and ferment them for 3 minutes. In one day, the fermentation temperature is controlled at 35°C to obtain selenium-enriched tea; it is pulverized by a pulverizer, airflow crushed, and multi-level nano-ball milled to form tea powder with a particle size of 100nm to obtain selenium-enriched nano-tea.
[0045] According to GB / t21729-2008, the content of selenium in tea is detected. After the tea sample is heated and digested with acid, the hexavalent selenium in the sample is reduced to tetravalent selenium in 6mol / L hydrochloric acid medium, and potassium borohydride is...
Embodiment 2
[0047] A kind of selenium-enriched nano tea, the preparation process of said selenium-enriched tea is as follows:
[0048]Pick fresh tea leaves; pile the tea leaves into a tea pile with a height of 10 cm, and steam sterilize at 120°C for 5 minutes; mix the sterilized tea leaves with the selenium-enriched fermentation bacteria cultivated in cultivation method 2, and pile them into a tea pile with a height of 80 cm. Ferment for 7 days, and the fermentation temperature is controlled at 55°C to obtain selenium-enriched tea; after pulverization with a pulverizer, airflow crushing, multi-level nano ball milling, and pulverize into tea powder with a particle size of 200nm, selenium-enriched nano tea is obtained.
[0049] According to GB / t21729-2008, the content of selenium in tea is detected. After the tea sample is heated and digested with acid, the hexavalent selenium in the sample is reduced to tetravalent selenium in 6mol / L hydrochloric acid medium, and potassium borohydride is us...
Embodiment 3
[0051] A kind of selenium-enriched nano tea, the preparation process of said selenium-enriched tea is as follows:
[0052] Pick fresh tea leaves; pile the tea leaves into a tea pile with a height of 12 cm, and steam sterilize at 110°C for 5 minutes; mix the sterilized tea leaves with the selenium-enriched fermentation bacteria cultivated by cultivation method 3, and pile them into a tea pile with a height of 85 cm. Ferment for 5 days, and the fermentation temperature is controlled at 40°C to obtain selenium-enriched tea; after pulverization with a pulverizer, airflow crushing, and multi-level nano-ball milling, it is pulverized into tea powder with a particle size of 150nm to obtain selenium-enriched nano-tea.
[0053] According to GB / t21729-2008, the content of selenium in tea is detected. After the tea sample is heated and digested with acid, the hexavalent selenium in the sample is reduced to tetravalent selenium in 6mol / L hydrochloric acid medium, and potassium borohydride ...
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