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Method for extracting theabrownin crude product from Liupu tea

A technology of theabrownin and Liupao tea, applied in the direction of tea extraction, etc., to achieve the effect of enriching research data and less demanding requirements for the extraction process and equipment of Liupao tea theabrownin

Inactive Publication Date: 2012-02-01
GUANGXI TEACHERS EDUCATION UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Extraction and separation of theabrownin from Liubao tea, the process conditions and methods are different from those in the domestic public literature, and the ultrasonic-assisted water solvent extraction method is used, and there is no domestic public report

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The steps of extracting crude theabrownin from Liubao tea are as follows:

[0036] 1. Weigh a certain amount of tea leaves, crush them with a centrifuge, accurately weigh 10g of tea powder, fill them into a three-necked flask, add 300mL of distilled water, assemble a reflux device, and use an ultrasonic device for 30 minutes at room temperature; heat to 100°C for 80 minutes, and the solution Suction filtration while hot, extract 3 times, combine filtrate 600mL; concentrate under reduced pressure to filtrate 100mL;

[0037] 2. Extract the concentrated solution of step 1 with 100mL chloroform, discard the chloroform layer, leave the water layer 100mL, then extract with 100mL chloroform, discard the chloroform layer, leave the water layer, 100mL;

[0038] 3. Extract the water layer in step 2 with 100mL ethyl acetate, discard the ethyl acetate layer, leave the water layer 100mL, then extract it with 100mL ethyl acetate, repeat twice, discard the ethyl acetate layer, and lea...

Embodiment 2

[0043] The steps of extracting crude theabrownin from Liubao tea are as follows:

[0044] 1. Weigh a certain amount of tea leaves, crush them with a centrifuge, accurately weigh 10g of tea powder, fill them into a three-necked flask, add 200mL of distilled water, assemble a reflux device, and use an ultrasonic device for 30 minutes at room temperature; heat to 80°C and extract with water for 60 minutes. Suction filter the solution while it is hot, extract 5 times, combine the filtrate 1000mL; concentrate under reduced pressure to the filtrate 100mL;

[0045]2. Extract the concentrated solution of step 1 with 100mL chloroform, discard the chloroform layer, leave the water layer 100mL, then extract with 100mL chloroform, discard the chloroform layer, leave the water layer, 100mL;

[0046] 3. Extract the water layer in step 2 with 100mL ethyl acetate, discard the ethyl acetate layer, leave the water layer 100mL, then extract it with 100mL ethyl acetate, repeat twice, discard the ...

Embodiment 3

[0051] The steps of extracting crude theabrownin from Liubao tea are as follows:

[0052] Weigh a certain amount of tea leaves, crush them with a centrifuge, accurately weigh 10g of tea powder, fill them into a three-necked flask, add 50mL of distilled water, assemble a reflux device, and treat with an ultrasonic device at room temperature for 30 minutes; heat to 40°C and extract with water for 20 minutes. Hot suction filtration, leaching twice, combined filtrate 100mL; concentrated under reduced pressure to filtrate 20mL;

[0053] 2. Extract the concentrated solution of step 1 with 20 mL of chloroform, discard the chloroform layer, leaving 20 mL of the water layer, then extract with 20 mL of chloroform, discard the chloroform layer, and leave the water layer, 20 mL;

[0054] 3. Extract the water layer in step 2 with 20 mL of ethyl acetate, discard the ethyl acetate layer, leave 20 mL of the water layer, then extract with 20 mL of ethyl acetate, repeat twice, discard the ethyl...

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Abstract

The invention discloses a method for extracting a theabrownin crude product from Liupu tea. The method comprises the following steps: utilizing an ultrasonic auxiliary aqueous solvent extraction process to extract Liupu tea powder; treating a tea extracting solution by utilizing chloroform, ethyl acetate and n-butyl alcohol to respectively extract and remove tea polyphenol, theaflavin and thearubigins; and finally acquiring the theabrownin crude product by evaporating the acquired water layer which is a theabrownin crude product solution. The method provided by the invention has the following beneficial effects: 1) the method has low demands on process and equipment for extracting theabrownin from the Liupu tea and is easily performed, and 2) the research shows that the method is capable of enriching research data of the Liupu tea and theabrownin, providing necessary assistance in identifying properties of the theabrownin of the Liupu tea and providing theoretical reference to the deep processing of the Liupu tea and the sale of middle and low-class Liupu tea.

Description

technical field [0001] The invention belongs to the field of theabrownin extraction, in particular to a method for extracting crude theabrownin from Liubao tea. Background technique [0002] Liubao tea is well-known throughout the country for its "red, strong, aged, and mellow", and is sold well in Guangxi, Guangdong, Hong Kong, Macao, Southeast Asia and other regions. Theabrownin is its quality characteristic. Theabrownin is a kind of tea pigment, which can resist oxidation, anti-tumor, protect liver, etc. These abilities are all related to its ability to scavenge free radicals. Theabrownin can scavenge free radicals, so it should also be able to resist oxidation, anti-tumor, protect the liver, etc., and some of its abilities have been confirmed by experiments. [0003] Both Liubao tea and Pu'er tea are dark teas, and the basic production process is greening, rolling, stacking, and drying. Studies have shown that the stacking process of Pu-erh tea is a series of oxidative...

Claims

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Application Information

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IPC IPC(8): A23F3/18
Inventor 何英姿张雪红朱家安逯钊琦
Owner GUANGXI TEACHERS EDUCATION UNIV
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