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Wuyi rock tea production place identification method through combination of three detection methods

A detection method and a technology of origin, applied in measuring devices, material analysis through optical means, instruments, etc., can solve problems such as inability to represent origin traceability, and achieve avoidance of insensitive loss functions, high recognition rate, and reduced computational complexity Effect

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

[0011] 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 the joint use of different types of detection data in metrology methods. The origin identification method of Wuyi rock tea based on the three detection methods of theanin, the method is based on the least squares support vector machine model, and the near-infrared characteristic spectral data, stable isotope Data and catechin data are fused together to establish an analysis model, and after extracting samples, use the model to objectively and accurately determine the origin of rock tea

Method used

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  • Wuyi rock tea production place identification method through combination of three detection methods

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Embodiment 1

[0083] A. Collect rock tea samples from different origins

[0084] 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 to be marked), a total of 33 sampling points, the sampling range basically covers the main production areas, and each sampling point takes 15 samples (respectively marked with A-1, A-2...A-15), and obtained 495 samples of Wuyi rock tea in geographical indication protected areas, and other counties and cities in Fujian Province except Wuyishan City (Jian...

Embodiment 2

[0145]Adopt the same modeling method as embodiment 1, use Duplex segmentation program for data segmentation, use Monte Carlo interactive verification, establish least squares support vector machine LS-SVM, partial least squares PLSDA, neural network ELM model respectively, near infrared The data remains unchanged, and the stable isotopes and catechins are spliced ​​in the near-infrared data according to hydrogen, oxygen, nitrogen, carbon, strontium, EGC, C, EGCG, GA, EC, ECG, and caffeine respectively, and the model recognition rates are 94.1% respectively , 90.5%, 91.6%.

Embodiment 3

[0147] Adopt the same modeling method as embodiment 1, use Duplex segmentation program for data segmentation, use Monte Carlo interactive verification, establish least squares support vector machine LS-SVM, partial least squares PLSDA, neural network ELM model respectively, near infrared The data remains unchanged, and the stable isotopes and catechins are spliced ​​in the near-infrared data according to hydrogen, oxygen, nitrogen, carbon, strontium, EGC, C, EGCG, GA, EC, respectively, and the model recognition rates are 97.9%, 92.3%, 93.8%.

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Abstract

The invention relates to a Wuyi rock tea production place identification method through combination of three detection methods such as near-infrared spectrum detection, stable isotope mass spectrum detection and catechin detection so as to establish a Wuyi rock tea production place identification method, 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 least square support vector machine model, the near infrared characteristic spectrum data, the stable isotope data and the catechin data of the rock teas from different production places are integrally fused, the LS-SVM analysis model is established, the recognition rate is highest, achieves 100.0%, and is higher than the LS-SVM 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 combined with three detection methods, the three detection methods are near-infrared spectrum detection, stable isotope mass spectrum detection and catechin content detection, belonging to the technical field of authenticity identification of geographical indication products. [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 has obvious regional characteristics and quality characteristics. The quality and ...

Claims

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Application Information

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IPC IPC(8): G01N21/359G01N21/3563G01N27/62G01N30/02
CPCG01N21/3563G01N21/359G01N27/62G01N30/02
Inventor 叶子弘楼云霄付贤树俞晓平崔海峰张雅芬
Owner CHINA JILIANG UNIV
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