Preparing method and quality evaluating method for puer tea enzyme-denatured leaves

A technology for pu-erh tea and greening, which is applied in pre-extraction tea processing, food testing, and beverage testing, etc., can solve problems such as being unsuitable for large-scale industrial production, lack of uniform standards, and poor standardization.

Inactive Publication Date: 2015-12-30
TIANJIN TASLY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It can be seen that the traditional fixing method has the defects of poor standardization, lack of uniform standards among batches, and unsuitability for industrialized mass production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0111] Take the fresh tea leaves and spread them out to dry on the surface, set the pot temperature to 400°C, the rotating speed at 20r / min, the amount of leaves thrown in at 200g / time, and the frequency of leaf throwing in at 10s / time with the greening machine to make the greening. For the determination of physical and chemical indicators.

[0112] 1. Moisture determination

[0113] Weigh 5.0g of ground sample into an aluminum box with a cover of known mass, put it in a drying oven at 120°C, calculate when it rises to 120°C within 2min, heat for 1h, cover it, take it out, and cool it to room temperature in a desiccator , weighing (accurate to 0.001g). According to the calculation formula of GB / T8304-2002, the moisture content is obtained.

[0114] 2. Determination of remaining peroxidase activity

[0115] (1) Standard curve drawing

[0116]Add 0, 0.01, 0.05, 0.1, 0.25, 0.5mL of Inger's salt solution to the stoppered colorimetric tube, and make the volume to 10mL. The con...

Embodiment 2

[0139] Take the fresh tea leaves and spread them out to dry on the surface, set the temperature of the pot to 250°C, the speed of rotation 20r / min, the amount of leaves thrown in 100g / time, and the frequency of leaf throwing in 10s / time with the greening machine to make green leaves. For the determination of physical and chemical indicators.

Embodiment 3

[0141] Take the fresh tea leaves and spread them out to dry on the surface, set the pot temperature to 450°C, the rotating speed at 40r / min, the amount of leaves thrown in at 300g / time, and the frequency of leaf throwing at 20s / time with the greening machine for killing greens, and the greening leaves are obtained. For the determination of physical and chemical indicators.

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PUM

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Abstract

The invention relates to a preparing method for puer tea enzyme-denatured leaves. The preparing method includes the steps of spreading airing and de-enzyming, a roller de-enzyming method is adopted in the de-enzyming process, and the preparing method includes the steps that fresh tea leaves are picked and spread to be aired until no water exists on the surfaces; a roller de-enzyming machine is started, and the pot temperature and rotating speed of the de-enzyming machine are set; after the de-enzyming machine is stable, the fresh tea leaves are placed into the roller de-enzyming machine according to certain leaf throwing amount and leaf throwing frequency; after de-enzyming is finished, the puer tea enzyme-denatured leaves are collected.

Description

Technical field: [0001] The invention relates to the preparation of a tea product, in particular to a method for preparing green leaves of Pu'er tea and the product obtained therefrom. Background technique: [0002] According to the national standard GB / T22111-2008 of the People's Republic of China, Pu'er tea is made from Yunnan big-leaf sun-dried green tea within the protection scope of geographical indications, and is made by specific processing technology within the protection scope of geographical indications. Tea with unique quality characteristics. Pu'er tea is divided into two types: Pu'er tea (raw tea) and Pu'er tea (cooked tea) according to the processing technology and quality characteristics. According to the appearance, it can be divided into Pu'er tea (cooked tea) loose tea and Pu'er tea (raw tea, cooked tea) pressed tea. [0003] The processing process of sun-dried green tea is as follows: spreading fresh leaves→cooking→kneading→unblocking→sunlight→drying→pac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23F3/06G01N33/14
Inventor 白晓丽李长文张晨霞刘顺航
Owner TIANJIN TASLY GROUP
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