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A method for distinguishing different origins of Pu-erh tea in a small area

A discrimination method and small-area technology, applied in the direction of instruments, color/spectral characteristic measurement, measuring devices, etc., can solve the problems of large geographical differences, long spatial distances, difficulty in adapting to the identification of origin, and many types of ingredients, etc., to achieve simple and easy operation The results are accurate and reliable, and the sample preparation method is simple

Active Publication Date: 2021-07-27
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Application Information

AI Technical Summary

Problems solved by technology

Most of these inventions are used to determine that different varieties or the same kind of tea with large geographical differences and long distances are all tea itself. There are many types of characteristic components for identification, which takes a long time. A series of research work has been carried out to solve this problem.
And it is difficult to adapt to the identification of the origin of the same tea in a concentrated geographical area. Therefore, it is necessary to combine highly sensitive detection methods for inorganic components and organic components to achieve efficient identification.

Method used

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  • A method for distinguishing different origins of Pu-erh tea in a small area
  • A method for distinguishing different origins of Pu-erh tea in a small area
  • A method for distinguishing different origins of Pu-erh tea in a small area

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Embodiment 1

[0031] The Pu'er tea in this example is representative tea from 10 cottages in Mengku Town, Lincang City, Yunnan Province.

[0032] figure 1 It is a flowchart of the operation steps, and the distinction of 10 kinds of tea from Mengku Town, Lincang City, Yunnan Province is realized through the processing process of sample preparation, measurement and statistical analysis in sequence. The specific method steps are as follows:

[0033] (1) The 10 kinds of tea samples used in the experiment all came from Mengku Town, Lincang City, Yunnan Province, but they were distributed on different hills: Bawai 1, Dahusai 2, Xiaohusai 3, Daxueshan 4, Knowing 5, Dijie 6, Nuowu 7, Banuo 8, Nasai 9 and Donglai 10, such as figure 2 shown. Prepare tea extracts from these ten tea samples as follow-up analysis samples: weigh 1g of the tea sample to be tested, soak in 50mL deionized water at a constant temperature of 90°C for 30min, filter out the tea residue, and cool the filtrate to room tempera...

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Abstract

The invention discloses a method for judging different origins of Pu-erh tea in a small area, comprising the following steps: (a) using a total reflection X-ray fluorescence spectrometer to analyze the content of inorganic elements in tea leaves; (b) using ultraviolet spectrophotometry to analyze the content of inorganic elements in tea leaves (c) using the linear discriminant analysis method to organize and analyze the quantitative results of each component obtained in steps (a) and (b) to realize the distinction of Pu-erh tea leaves from different origins; The method has the advantages of simple operation, low cost, environmental protection, and accurate and reliable detection results.

Description

technical field [0001] The invention relates to a method for discriminating different producing areas of Pu'er tea in a small area. Background technique [0002] The world's tea originated in China and is widely circulated around the world. It is one of the three most popular drinks in the world. Because of its medicinal value superior to the other two drinks, it is highly praised by people from all over the world. Pu'er tea is a unique tea species in Yunnan. It has a long history and high nutritional element content. It is famous all over the world for its unique title of "drinkable antique". There are four main production areas of Pu'er tea: Baoshan City, Lincang City, Pu'er City and Xishuangbanna Dai Autonomous Prefecture, among which the Lincang tea area is one of the most representative areas with the largest stock of ancient tea tree heritage. Lincang tea-producing areas are mainly concentrated in Cangyuan, Shuangjiang, Fengqing, Yunxian and other places. Among them, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/223G01N21/33G01N23/2206
CPCG01N21/33G01N23/2206G01N23/223
Inventor 单卿唐馨如张新磊熊根超贾文宝凌永生黑大千
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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