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Wuyi rock tea production place identification method based on partial least square discrimination

A technology of partial least squares and place of origin, which is applied in the field of authenticity identification of geographical indication products, and can solve problems such as being unable to represent the place of origin.

Inactive Publication Date: 2017-04-12
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The purpose of the present invention is to solve the problem that a single detection data cannot represent all the key information of origin traceability and the joint use of different types of detection data in the metrology method, and analyze the existing data matching, and provide Wuyi rock tea based on partial least squares discrimination Origin identification method, combined with near-infrared spectroscopy, stable isotope, trace elements and catechin data to establish a Wuyi rock tea origin identification model technology method, this method is based on a partial least squares discriminant model, and different origin rock tea (including geographical indication origin The near-infrared characteristic spectrum data, stable isotope data, trace element data, and catechin data are integrated to establish an analysis model, and the model is used to objectively and accurately determine the origin of rock tea after extracting samples

Method used

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  • Wuyi rock tea production place identification method based on partial least square discrimination
  • Wuyi rock tea production place identification method based on partial least square discrimination
  • Wuyi rock tea production place identification method based on partial least square discrimination

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Experimental program
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Embodiment 1

[0082] A. Collect rock tea samples from different origins

[0083] 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 including Village, Wufu, Langu, Xinfeng Street, Yangzhuang, Xingtian, Xiamei, and Wutun, and 3 sampling points were randomly selected in each administrative area (respectively 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, Jia...

Embodiment 2

[0152] Adopt the modeling method identical with embodiment 1, data segmentation uses Duplex segmentation program, with Monte Carlo interactive verification, respectively establishes PLSDA, neural network ELM and least squares support vector machine LS-SVM model, near-infrared data is constant, Stable isotopes, trace elements and catechins were spliced ​​in the near-infrared The model recognition rates were 92.3%, 80.5%, and 88.9% respectively.

Embodiment 3

[0154] Adopt the modeling method identical with embodiment 1, data segmentation uses Duplex segmentation program, with Monte Carlo interactive verification, respectively establishes PLSDA, neural network ELM and least squares support vector machine LS-SVM model, near-infrared data is constant, Stable isotopes, trace elements, and catechins were spliced ​​in the near-infrared data according to hydrogen, oxygen, nitrogen, carbon, strontium, Cs, Cu, Ca, Rb, Sr, Ba, EGC, C, EGCG, GA, and EC, respectively. The model recognition rates were 94.5%, 83.2%, and 89.7%, respectively.

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Abstract

The invention relates to a Wuyi rock tea production place identification method based on partial least square discrimination, and belongs to the technical field of geographical indication product authenticity recognition. In the prior art, the single detection data cannot represent all production place traceability key information, the data matching problem exists when different types of the detection data are subjected to combined use in the metrology method, and other problems exist. A purpose of the present invention is to solve the problems in the prior art. According to the present invention, based on the partial least square discrimination model, the near infrared characteristic spectrum data, the stable isotope data, the trace element data and the catechin data of the rock teas (produced inside and outside the geographical indication production place) from different production places are integrally fused, the analysis model is established, the sample is extracted, and the rock tea production place is objectively and accurately determined by using the model, wherein the recognition rate is highest, achieves 100.0%, and is higher than the PLSDA determining result of the single data, and the recognition rate of the blind sample achieves 100%; and the method has the good application prospect, and can be used as the Wuyi rock tea production place traceability recognition technical method.

Description

[0001] (1) Technical field [0002] The invention relates to a method for identifying the origin of Wuyi rock tea based on partial least squares discrimination. The method for identifying the origin of Wuyi rock tea in the invention combines near-infrared spectrum, stable isotope, trace element and catechin data, and belongs to the authenticity of geographical indication products Identify technical areas. [0003] (2) Background technology [0004] According to the definition of GB / T 17924-2008, a geographical indication product refers to the use of raw materials produced in a specific region and produced in a specific region according to traditional techniques. The quality, characteristics or reputation are essentially determined by the geographical characteristics of the region of origin , and products named after the name of the region of origin have been reviewed and approved according to legal procedures. Tea is a typical product protected by geographical indications. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/359G01N21/31G01N27/62G01N30/02G01N1/44
CPCG01N1/44G01N21/3103G01N21/359G01N27/62G01N30/02
Inventor 叶子弘付贤树俞晓平崔海峰张雅芬
Owner CHINA JILIANG UNIV
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