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Method for preparing high gamma-aminobutyric acid instant tea

A technology of aminobutyric acid and instant tea, which is applied in the direction of tea extraction and pre-extraction tea treatment, etc., can solve the problems of failure to recycle, increase costs, waste of resources, etc., improve appearance quality, reduce waste water discharge, and reduce damage The effect of action

Active Publication Date: 2014-05-07
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The existing problems in the method of producing gamma-aminobutyric acid instant tea with gamma-aminobutyric acid dry tea leaves as raw materials are as follows: 1), when producing gamma-aminobutyric acid dry tea leaves, the tea leaves need to be dried to produce gamma-aminobutyric acid GABA instant tea is extracted by soaking dry tea leaves in hot water, which consumes a lot of energy; 2) soaking fresh leaves of tea trees in aqueous glutamic acid solution can increase the content of GABA, but there are some The generated γ-aminobutyric acid has been dissolved into the aqueous solution, and these aqueous solutions are discharged as wastewater, which is not conducive to environmental protection, and the γ-aminobutyric acid and other substances in it cannot be recycled, which wastes resources and increases costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1, a kind of method for preparing high γ-aminobutyric acid instant tea, selects the tea tree fresh leaf (tea tree variety " water ancient tea ") of one bud and two leaves as tea raw material, carries out following technological steps successively:

[0045] 1), put 1000g of tea tree fresh leaves with one bud and two leaves into a stainless steel basin with a diameter of 35cm and a depth of 20cm, and add 1000g of glutamic acid aqueous solution with a mass concentration of 2.5%, so that the tea leaves are evenly drenched;

[0046] 2) Put the tea leaves soaked in the glutamic acid aqueous solution obtained in the above step 1) together with the stainless steel container in a vacuum drying oven, at -0.1mpa Anaerobic treatment under high temperature conditions for 30h; separation, so as to respectively obtain tea leaves after vacuum anaerobic treatment and glutamic acid aqueous solution after vacuum anaerobic treatment;

[0047] 3) Put the tea after vacuum anaerobi...

Embodiment 2

[0051] Embodiment 2, a method for preparing high γ-aminobutyric acid instant tea, select the fresh leaves of tea tree (tea tree variety "Fuding Dabai tea", 50% of one bud and two leaves, 50% of one bud and three leaves) as the tea raw material, Carry out the following process steps in sequence:

[0052] 1), put 1000g of the above-mentioned tea tree fresh leaves into a stainless steel basin with a diameter of 45cm and a depth of 30cm, and add 4000g of glutamic acid aqueous solution with a mass concentration of 0.25%, so that the tea leaves are evenly drenched;

[0053] 2) Put the tea soaked in the glutamic acid aqueous solution obtained in the above step 1) together with the stainless steel container in a vacuum drying oven, and perform anaerobic treatment for 0.5h under the vacuum condition of -0.05ma; separate, so as to obtain vacuum anaerobic Treated tea leaves and glutamic acid aqueous solution after vacuum anaerobic treatment;

[0054] 3) Put the tea after vacuum anaerobi...

Embodiment 3

[0058] Embodiment 3, a kind of method for preparing high γ-aminobutyric acid instant tea, select the tea tree fresh leaf of one bud four, five leaves (tea tree variety " water ancient tea ", one bud four leaves 50%, one bud five leaves 50% %) as tea raw material, the following steps are carried out successively:

[0059] 1), put 1000g of the above-mentioned tea tree fresh leaves into a stainless steel basin with a diameter of 35cm and a depth of 25cm, and add 2000g of glutamic acid aqueous solution with a mass concentration of 0.1%, so that the tea leaves are evenly drenched;

[0060] 2) Put the tea soaked in glutamic acid aqueous solution obtained in the above step 1) together with the stainless steel container in a vacuum drying oven, and anaerobically treat it for 8 hours under the vacuum condition of -0.08mpa; separate, so as to obtain vacuum anaerobic treatment respectively Glutamic acid aqueous solution after tea leaves and vacuum anaerobic treatment;

[0061] 3) Put th...

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Abstract

The invention discloses a method for preparing high gamma-aminobutyric acid instant tea. The method comprises the following steps: soaking fresh tea leaves into a 0.25% to 2.5% glutamic acid aqueous solution, the weight of which is one to four times that of the fresh tea leaves; performing anaerobic treatment on the tea leaves for 0.5 to 30 hours under the vacuum degree being -0.05mpa to -0.1mpa; taking out the tea leaves and putting the tea leaves into boiling water, the weight of which is one to four times that of the tea leaves, for 10 to 30 seconds; combining the tea leaves with the glutamic acid aqueous solution after being used for soaking the fresh tea leaves; crushing and homogenizing for 1 to 5 minutes; filtering with a filter screen being 200 meshes; performing high-speed centrifugation on a filtrate at 5000rpm to 7000rpm (Revolutions Per Minute); performing reverse osmosis concentration until the concentration is greater than or equal to 100g / L; then performing reduced pressure evaporation concentration until the concentration is greater than or equal to 300g / L; and performing spray drying or freezing drying until the water content is less than or equal to 5%, thereby obtaining the high gamma-aminobutyric acid instant tea in a shape of green powder. The content of gamma-aminobutyric acid in gamma-aminobutyric acid is between 20.5mg / g and 35.5mg / g.

Description

technical field [0001] The invention relates to a method for preparing instant tea powder, in particular to a method for preparing high-γ-aminobutyric acid instant tea (also known as GABA instant tea). Background technique [0002] Gamma-aminobutyric acid (GABA) is a non-protein amino acid found in animals, plants and microorganisms. In mammals, γ-aminobutyric acid exists in the brain and spinal cord, and is an inhibitory neurotransmitter in the central nervous system. Sleep, anti-aging, enhance long-term memory, improve liver and kidney functions and other physiological activities, can be used in medicine, food, beverage, cosmetics and other fields. The content of γ-aminobutyric acid in ordinary tea is very low, generally between 0.02 and 0.2mg / g, while γ-aminobutyric acid tea (GABA tea) generally requires its content to reach more than 1.5mg / g. [0003] GABA in tea is mainly produced by decarboxylation of glutamic acid, which is catalyzed by glutamic acid decarboxylase. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23F3/16A23F3/14
Inventor 梁月荣康受姈邵文韵郑新强陆建良
Owner ZHEJIANG UNIV
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