Wuyi rock tea production place identification method through combination of electronic tongue and chromatographic separation technology

A chromatographic separation and electronic tongue technology, which is applied in the field of identification of the origin of Wuyi rock tea, can solve the problems of being unable to represent the origin of the origin.

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 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. It provides a combination of electronic tongue data and chromatographic separation (including Amino acids and catechins) data of Wuyi rock tea origin identification model technology

Method used

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  • Wuyi rock tea production place identification method through combination of electronic tongue and chromatographic separation technology
  • Wuyi rock tea production place identification method through combination of electronic tongue and chromatographic separation technology
  • Wuyi rock tea production place identification method through combination of electronic tongue and chromatographic separation technology

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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 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, 15 samples were taken from each sampling point (marked with A-1, A-2...A-15 respectively), and 495 samples were obtained Wuyi rock tea samples in the geographical indication protected area, and other counties and cities in Fujian Province except Wuyishan C...

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 . Select 20, 60, and 100 blind samples respectively, and su...

Embodiment 3

[0137] Adopt the modeling method identical with embodiment 1, data segmentation uses Kenstone segmentation program, with Monte Carlo interactive verification, establishes least squares support vector machine (LS-SVM), neural network ELM, partial least squares (PLSDA) respectively Model, electronic tongue data unchanged (ZZ, BA, BB, CA, GA, HA, JB), amino acid and catechin data according to aspartyl, proline, tryptophan, phosphoethanolamine, urea, After splicing amino acid, EGC, C, EGCG, GA, EC, ECG, and caffeine into the electronic tongue data, the model recognition rates were 91.3%, 80.9%, and 77.5%, respectively.

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Abstract

The invention relates to a Wuyi rock tea production place identification method through combination of electronic tongue and a chromatographic separation technology, 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 discrimination model, the electronic tongue data and the chromatographic separation data (including amino acids, catechin and the like) of the rock teas (produced inside and outside the geographical indication production place) from different production places are integrally fused, the LS-SVM 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 of the model formed through the data fusion 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 electronic tongue and chromatographic separation technology, 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 facto...

Claims

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Application Information

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IPC IPC(8): G01N27/00G01N30/02
CPCG01N27/00G01N30/02
Inventor 俞晓平叶子弘付贤树崔海峰张雅芬
Owner CHINA JILIANG UNIV
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