A method for identifying the origin of black tea based on chiral quantitative analysis technology

A technology of quantitative analysis and discrimination method, applied in the direction of analyzing materials, measuring devices, material separation, etc., to achieve the effect of simple operation, strong prediction ability, and avoidance of waste

Active Publication Date: 2019-06-28
TEA RES INST CHINESE ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, in the field of identification of tea origin, there is no related report on the use of chiral quantitative analysis technology combined with PLS-DA

Method used

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  • A method for identifying the origin of black tea based on chiral quantitative analysis technology
  • A method for identifying the origin of black tea based on chiral quantitative analysis technology
  • A method for identifying the origin of black tea based on chiral quantitative analysis technology

Examples

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Embodiment 1

[0033] Example 1: Discrimination of origins of Guangdong Yingde black tea, Anhui Qimen black tea, Yunnan Dianhong and Sri Lankan black tea: By performing PLS-DA modeling on the content of chiral terpenoids in each black tea, the corresponding origin of black tea can be predicted information.

[0034] Specific steps:

[0035] 1) Collect Guangdong Yingde black tea, Anhui Qimen black tea, Yunnan Dianhong and Sri Lanka Ceylon black tea 20 each.

[0036] 2) Establishment of quantitative standard curve for chiral terpenoids

[0037] buy commercially available R -Linalool, linalool racemate, furan-type linalool oxide (A, B mixture), pyran-type linalool oxide (C, D mixture), S -4-terpineol, 4-terpineol racemate, R -α-terpineol, α-terpineol racemate, R -Limonene, limonene racemate and α-ionone standard substance, chiral GC-MS analysis is carried out to above-mentioned standard substance, record retention time, determine corresponding characteristic ion peak and quantitative ion pe...

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Abstract

The invention belongs to the technical field of tea leaf distinguishing and in particular relates to a discriminant method for black tea production places based on a chiral quantitative analysis technology. The discriminant method comprises the following steps: 1), determining content of chiral terpenoids in black tea from different production places; 2) establishing and identifying a PLS-DA (Partial Least Squares-Discriminant Analysis) model of the black tea from the different production places; 3) predicating production places of unknown black tea samples. By adopting the method provided by the invention, rapid and effective discriminant of the black tea from the different places under green, environment-friendly and pollution-free conditions, and the correct judgment ratio reaches 95 percent or more; an analysis result is a quantified numerical value and man-made interference factors are eliminated; the discriminant method has a wide application prospect in the protection field, which receives increasing attention at present, of origin places of the tea leaves.

Description

technical field [0001] The invention belongs to the technical field of tea identification, and in particular relates to a method for identifying the origin of black tea based on chiral quantitative analysis technology. Background technique [0002] Black tea has always been the mainstream product in the international tea market, accounting for about 75% of the world's tea trade volume. Black tea production areas are widely distributed, especially in India, Sri Lanka and southern China, where black tea production occupies an important position in the agricultural economy. China is the first country in the world to invent and process black tea. Black tea is produced in 14 countries including Yunnan, Sichuan, Chongqing, Hubei, Hunan, Fujian, Guangdong, Guangxi, Hainan, Jiangxi, Zhejiang, Anhui, Jiangsu, and Taiwan. State / Province / State. The flavor and quality of black tea from different origins are quite different, and the degree of love naturally varies from person to pe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02
CPCG01N30/02
Inventor 朱荫吕海鹏林智邵晨阳穆兵康受姈戴伟东张悦谭俊峰郭丽彭群华
Owner TEA RES INST CHINESE ACAD OF AGRI SCI
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