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Wuyi rock tea origin identification method combining near infrared test and stable isotope test

A stable isotope, near-infrared technology, applied in the field of authenticity identification of geographical indication products, can solve the problem of unable to represent the origin of traceability and other problems

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

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the problems 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 metrology methods, and provide a joint near-infrared spectrum data and stable isotope data. The Wuyi rock tea origin identification model identification method, which is based on the partial least squares discriminant model, integrates the near-infrared characteristic spectral data and stable isotope data of rock tea from different origins (including rock teas within and outside the origin of geographical indications), Establish an analysis model, and use the model to objectively and accurately determine the origin of rock tea after extracting samples

Method used

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  • Wuyi rock tea origin identification method combining near infrared test and stable isotope test
  • Wuyi rock tea origin identification method combining near infrared test and stable isotope test
  • Wuyi rock tea origin identification method combining near infrared test and stable isotope test

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Experimental program
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Effect test

Embodiment 1

[0076] A. Collect rock tea samples from different origins

[0077] 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 took 15 samples (marked with A-1, A-2...A-15), and obtained 495 geographical Wuyi rock tea samples in the protected area of ​​the logo, and other counties and cities in Fujian Province (Jianyang, Jianou, Zhangzhou, Quanzhou, Songxi, Zhe...

Embodiment 2

[0135] Blind sample detection: The blind sample supervision team purchases rock tea samples from Wuyi rock tea farmers, monitors the steps of drying, greening, and finishing to ensure the origin of the rock tea samples. The above samples are used as geographical indications in the blind samples. Samples in the region; rock tea was purchased from Jianyang, Jianou, Wuyuan and other places as samples outside the geographical indication production area in the blind sample. The above blind sample and the modeling rock tea sample came from different manufacturers. Analyzing and testing personnel failed to know the origin attribute of the blind sample to be tested in advance, randomly selected several copies, tested, and then judged the origin attribute of the blind sample according to the method of the present invention, and checked with the blind sample supervision team to determine the recognition rate of the blind sample .

[0136] 20, 60, and 100 blind samples were respectively ...

Embodiment 3

[0138] Adopt the modeling method identical with embodiment 1, data segmentation uses Kenstone segmentation procedure, with Monte Carlo interactive verification, set up partial least squares (PLSDA), neural network ELM and least squares support vector machine (LS-SVM) respectively For the model, the near-infrared data remains unchanged, and the stable isotopes are spliced ​​into the near-infrared data according to hydrogen, oxygen, nitrogen, carbon, and strontium. The model recognition rates are 97.3%, 90.7%, and 82.3%, respectively.

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Abstract

The invention relates to a Wuyi rock tea origin identification method combining a near infrared test and a stable isotope test, and belongs to the technical field of geographical trademark products authenticity identification. The method aims to solve the problems that a single type of test data cannot represent all the key information of an origin, and different types of test data need to match in the metrological method. The method is based on a partial least squares discrimination model, and establishes the analytic models of near infrared spectral data, stable isotope data and the combined data of the two data of the rock teas of different origins (including the rock tea in the geographical trademark origin and the rock tea out of the geographical trademark origin) based on the same method. After a sample is extracted, the models are used for identifying the rock tea origin in an objective and accurate manner. The models established by the combined data can attain the maximum identification rate which is as high as 100%, far exceeding PLSDA results derived from a single data type, and the identification rate of blind sample can attain 100%.the method possessesa promising application prospect. The method can be used as the identification technical method of Wuyi rock tea origin.

Description

[0001] (1) Technical field [0002] The invention relates to a method for identifying the origin of Wuyi rock tea combined with near-infrared and stable isotope inspection, and belongs 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 taste are closely related to the geographical conditions, climatic factors, and environmental factors of the place ...

Claims

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Application Information

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IPC IPC(8): G01N21/359G01N21/3563G01N27/62G01N27/00G06F17/50G06K9/62G06Q50/02
CPCG06Q50/02G01N21/3563G01N21/359G01N27/00G01N27/62G06F30/20G06F18/2132G06F18/25G06F18/24
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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