Discriminating the adulteration of varieties and misrepresentation of vintages of Pu’er tea based on Fourier transform near infrared diffuse reflectance spectroscopy

In the Pu’er tea market, the ubiquity of blending different varieties and the fraudulent representation of vintage years present a persistent challenge. Traditional sensory evaluation and experience are often inadequate for discerning the true variety and vintage of tea, highlighting the need for mo...

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Main Authors: Zhenfa Yang, Xiaoping Lu, Lucheng Chen
Format: Article
Language:English
Published: Frontiers Media S.A. 2025-02-01
Series:Frontiers in Chemistry
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Online Access:https://www.frontiersin.org/articles/10.3389/fchem.2025.1546702/full
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author Zhenfa Yang
Zhenfa Yang
Xiaoping Lu
Lucheng Chen
author_facet Zhenfa Yang
Zhenfa Yang
Xiaoping Lu
Lucheng Chen
author_sort Zhenfa Yang
collection DOAJ
description In the Pu’er tea market, the ubiquity of blending different varieties and the fraudulent representation of vintage years present a persistent challenge. Traditional sensory evaluation and experience are often inadequate for discerning the true variety and vintage of tea, highlighting the need for more sophisticated analytical methods to ensure authenticity and quality. Fourier transform near infrared diffuse reflectance spectroscopy combined with radial basis function neural network (RBFNN) was applied for determination of the varieties and vintages of Pu’er tea. For vintage identification, the accuracy, precision, recall, and F1-score of the RBFNN model for the prediction set were 99.2%, 98.2%, 98.0%, and 98.0%, respectively. For identification of varieties adulteration, the corresponding parameters were 98.9%, 97.2%, 96.7%, and 96.6%, respectively. These results illustrated the feasibility to identify the adulteration of varieties and misrepresentation of vintages of Pu’er tea with near infrared spectra and RBFNN model, proving an efficient alternative for Pu’er tea quality inspection, and offering a robust method for combating the pervasive issues within the market.
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spelling doaj-art-f88d5343ba8f4c45918bd5aca8917aca2025-02-05T07:32:43ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462025-02-011310.3389/fchem.2025.15467021546702Discriminating the adulteration of varieties and misrepresentation of vintages of Pu’er tea based on Fourier transform near infrared diffuse reflectance spectroscopyZhenfa Yang0Zhenfa Yang1Xiaoping Lu2Lucheng Chen3State Key Laboratory of Massive Personalized Customization System and Technology, Qingdao, ChinaSchool of Control Science and Engineering, Shandong University, Jinan, ChinaState Key Laboratory of Massive Personalized Customization System and Technology, Qingdao, ChinaState Key Laboratory of Massive Personalized Customization System and Technology, Qingdao, ChinaIn the Pu’er tea market, the ubiquity of blending different varieties and the fraudulent representation of vintage years present a persistent challenge. Traditional sensory evaluation and experience are often inadequate for discerning the true variety and vintage of tea, highlighting the need for more sophisticated analytical methods to ensure authenticity and quality. Fourier transform near infrared diffuse reflectance spectroscopy combined with radial basis function neural network (RBFNN) was applied for determination of the varieties and vintages of Pu’er tea. For vintage identification, the accuracy, precision, recall, and F1-score of the RBFNN model for the prediction set were 99.2%, 98.2%, 98.0%, and 98.0%, respectively. For identification of varieties adulteration, the corresponding parameters were 98.9%, 97.2%, 96.7%, and 96.6%, respectively. These results illustrated the feasibility to identify the adulteration of varieties and misrepresentation of vintages of Pu’er tea with near infrared spectra and RBFNN model, proving an efficient alternative for Pu’er tea quality inspection, and offering a robust method for combating the pervasive issues within the market.https://www.frontiersin.org/articles/10.3389/fchem.2025.1546702/fullnear infrared spectroscopyradial basis function neural networkPu’er teaadulteration of varietiesmisrepresentation of vintages
spellingShingle Zhenfa Yang
Zhenfa Yang
Xiaoping Lu
Lucheng Chen
Discriminating the adulteration of varieties and misrepresentation of vintages of Pu’er tea based on Fourier transform near infrared diffuse reflectance spectroscopy
Frontiers in Chemistry
near infrared spectroscopy
radial basis function neural network
Pu’er tea
adulteration of varieties
misrepresentation of vintages
title Discriminating the adulteration of varieties and misrepresentation of vintages of Pu’er tea based on Fourier transform near infrared diffuse reflectance spectroscopy
title_full Discriminating the adulteration of varieties and misrepresentation of vintages of Pu’er tea based on Fourier transform near infrared diffuse reflectance spectroscopy
title_fullStr Discriminating the adulteration of varieties and misrepresentation of vintages of Pu’er tea based on Fourier transform near infrared diffuse reflectance spectroscopy
title_full_unstemmed Discriminating the adulteration of varieties and misrepresentation of vintages of Pu’er tea based on Fourier transform near infrared diffuse reflectance spectroscopy
title_short Discriminating the adulteration of varieties and misrepresentation of vintages of Pu’er tea based on Fourier transform near infrared diffuse reflectance spectroscopy
title_sort discriminating the adulteration of varieties and misrepresentation of vintages of pu er tea based on fourier transform near infrared diffuse reflectance spectroscopy
topic near infrared spectroscopy
radial basis function neural network
Pu’er tea
adulteration of varieties
misrepresentation of vintages
url https://www.frontiersin.org/articles/10.3389/fchem.2025.1546702/full
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