Method for identifying specific geographical indications of Wuyi rock tea

A geographical indication and rock tea technology, which is applied in the field of authenticity identification of geographical indication products, can solve problems such as unrepresentable detection data and full traceability of origin

Inactive Publication Date: 2018-04-27
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problem that a single type of detection data cannot represent all the key information of origin traceability, and also solve the problems of joint use of different types of detection data in metrology methods, analysis of existing data matching, etc., and provide a joint stable isotope, Wuyi rock tea origin identification model technology method for trace elements and catechins. This method is based on a neural network discriminant model and combines the stable isotopes, trace elements, and catechins of rock tea within and outside the origin of geographical indications to establish an analysis model. After extracting samples, use the model to objectively and accurately determine the origin of rock tea

Method used

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  • Method for identifying specific geographical indications of Wuyi rock tea
  • Method for identifying specific geographical indications of Wuyi rock tea
  • Method for identifying specific geographical indications of Wuyi rock tea

Examples

Experimental program
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Effect test

Embodiment 1

[0070] A. Collect rock tea samples from different origins

[0071] The national standard (GB / T 18745-2006) stipulates the scope of geographical protection of Wuyi rock tea, that is, within the administrative division of Wuyishan City, Fujian Province, the present invention is located in Wuyi Street, Chong'an Street, Shangmei, and Xingxia in the Wuyi Rock Tea Geographical Indication Protection Area. Samples were collected in 11 administrative areas of Village, Wufu, Langu, Xinfeng Street, Yangzhuang, Xingtian, Xiamei, and Wutun, and 3 sampling points were randomly selected in each administrative area (in the order of A, B, C marked), a total of 33 sampling points, the sampling range basically covers the main production areas, each sampling point sampling 15 copies (respectively marked with A-1, A-2...A-15), obtained 495 Wuyi rock tea samples from the Geographical Indication Protection Area, and other counties and cities in Fujian Province except Wuyishan City (Jianyang, Jianou,...

Embodiment 2

[0126] Using the same modeling method as in Example 1, the data segmentation uses the kenstone segmentation program, and uses the K-fold interactive verification to establish a neural network, partial least squares (PLSDA), and least squares support vector machine (LS-SVM) respectively Models, stable isotopes, trace elements, catechins spliced ​​together according to hydrogen, oxygen, nitrogen, carbon, strontium, Cs, Cu, Ca, Rb, Sr, Ba, EGC, C, EGCG, GA, EC, ECG and caffeine , and their model recognition rates are 94.8%, 81.7% and 83.5%, respectively.

Embodiment 3

[0128]Using the same modeling method as in Example 1, the data segmentation uses the kenstone segmentation program, and uses the K-fold interactive verification to establish a neural network, partial least squares (PLSDA), and least squares support vector machine (LS-SVM) respectively Models, stable isotopes, trace elements, and catechins are spliced ​​together according to hydrogen, oxygen, nitrogen, carbon, strontium, Cs, Cu, Ca, Rb, Sr, Ba, EGC, C, EGCG, GA, and EC, and the model identification The rates were 95.9%, 82.0% and 85.4%.

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Abstract

The invention relates to a method for identifying specific geographical indications of a Wuyi rock tea and belongs to the technical field of authenticity recognition of geographical indication products. The method solves the problem that single detection data cannot represent all the key information of places of origin and different types of detection data have poor matching ability to data used in the metrological method. The method comprises fusing stable isotope data and trace element and catechin data of rock teas in different places of origin based on a neural network ELM model, buildingan analysis model, extracting a sample, and objectively and accurately determining places of origin of rock teas through the model, wherein the model built by three fused data has the highest recognition rate of 100.0% much higher than the ELM results of single data and the blind sample recognition rate of 100%. The method has a good application prospect and can be used as the Wuyi rock tea originidentifying technology.

Description

(1) Technical field [0001] The invention relates to a method capable of identifying specific geographical indications of Wuyi rock tea. The modeling method includes three types of data, including stable isotopes, trace elements and catechins, and belongs to the technical field of authenticity identification of geographical indication products. (2) Background technology [0002] Geographical indication products refer to products whose quality, reputation or other characteristics are essentially determined by the natural and human factors of the place of origin, and which are named after examination and approval with geographical names. Tea is a typical geographical indication protected product, and its quality and taste are closely related to the geographical conditions, climate factors, environment and other factors of the place of origin. Wuyi rock tea is one of the representative tea products. [0003] At present, domestic and foreign finished tea origin identification met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N27/62G06N3/04G06N3/08
CPCG01N21/3103G01N27/62G01N2021/3114G06N3/04G06N3/08
Inventor 叶子弘俞晓平付贤树崔海峰张雅芬
Owner CHINA JILIANG UNIV
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