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Wuyi rock tea production place identification method through combination of isotope detection and trace element detection

A technology of trace elements and isotopes, which is applied in measuring devices, color/spectral characteristic measurement, material analysis by electromagnetic means, etc., can solve the problems of not being able to represent the place of origin, traceability of all sources, etc.

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 detection method 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 data Based on the partial least squares discriminant model, the method integrates the stable isotope data and trace element data of rock tea in and outside the origin of geographical indications, establishes an analysis model, and extracts After sampling, 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 isotope detection and trace element detection
  • Wuyi rock tea production place identification method through combination of isotope detection and trace element detection
  • Wuyi rock tea production place identification method through combination of isotope detection and trace element detection

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Embodiment 1

[0077] A. Collect rock tea samples from different origins

[0078] 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 copies Wuyi rock tea samples in the geographical indication protected area, and other counties and cities in Fujian Province except Wuyishan City (Jianyang, Jianou, Zhangzh...

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. The analysis 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 from the above-me...

Embodiment 3

[0137]Adopt the modeling method identical with embodiment 1, data segmentation uses kenstone segmentation program, uses Monte Carlo interactive verification, establishes respectively PLSDA, neural network ELM and least squares support vector machine (LS-SVM) discriminant model, stable isotope is Hydrogen, oxygen, nitrogen, carbon, strontium, trace element data Cs, Cu, Ca, Rb, Sr, Ba, Mg, Mn, Ti, Cr, Co, Ni, Zn, Cd spliced ​​in stable isotopes, the model recognition rate They were 92.5%, 87.6% and 81.9%, respectively.

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Abstract

The invention relates to a Wuyi rock tea production place identification method through combination of isotope detection and trace element detection, 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 and analysis 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 isotope data and the trace element 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 achieves 100.0% and is far higher than the PLSDA 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 isotope and trace element inspection. The method combines stable isotope and trace element data to establish a partial least squares discriminant model, and as a method for identifying the origin of Wuyi rock tea, it belongs to the authenticity identification of geographical indication products technology field. [0003] (2) Background technology [0004] 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 represe...

Claims

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Application Information

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IPC IPC(8): G01N27/62G01N21/31
CPCG01N21/3103G01N27/62
Inventor 付贤树叶子弘俞晓平崔海峰张雅芬
Owner CHINA JILIANG UNIV
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