GB/T 45884-2025 English PDF

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GB/T 45884-2025: White tea origin discrimination - Near infrared spectral method
Status: Valid

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GB/T 45884-2025	189	Add to Cart	3 days	White tea origin discrimination - Near infrared spectral method	Valid

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Basic data

Standard ID: GB/T 45884-2025 (GB/T45884-2025)
Description (Translated English): White tea origin discrimination - Near infrared spectral method
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: X55
Classification of International Standard: 67.140.10
Word Count Estimation: 9,917
Date of Issue: 2025-06-30
Date of Implementation: 2025-10-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 45884-2025: White tea origin discrimination - Near infrared spectral method

---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT45884-2025
ICS 67.140.10 CCSX55 National Standard of the People's Republic of China Determination of origin of white tea by near infrared spectroscopy Released on June 30, 2025 Implementation on October 1, 2025 State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Principle 2 5 Instruments and Equipment 2 6 Establishment and verification of near-infrared spectroscopy model 2 7 Origin determination 3 8 Model Update and Maintenance 3 9 Accuracy of discrimination 3 10 Discrimination Example 4 Appendix A (Informative) Example of Identifying the Origin of Fuding White Tea 5 Preface This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document is proposed by the China National Federation of Supply and Marketing Cooperatives. This document is under the jurisdiction of the National Technical Committee on Tea Standardization (SAC/TC339). This document was drafted by. Fujian Agriculture and Forestry University, Fujian Rongyuntong Ecological Technology Co., Ltd., Xiamen Tea and Agricultural Science and Technology Research Institute Co., Ltd. Company, Anhui Agricultural University, China National Federation of Supply and Marketing Cooperatives Hangzhou Tea Research Institute, Lishui Agricultural and Forestry Science Research Institute, Liumiao White Tea Co., Ltd. Company, Fujian Pinpinxiang Tea Co., Ltd., Beijing Xiaoguan Tea Co., Ltd., Nanping Jianyang District Tea Development Center, Thermo Fisher Scientific (China) Co., Ltd., Fu'an Tea Industry Development Center, Fuding Zhang Rangji Tea Co., Ltd., Ya'an Quality Inspection and Testing Institute (Ya'an Food and Drug Inspection Institute), Guangxi Subtropical Crops Research Institute, Dahuang (Fujian) Tea Co., Ltd., Fujian Huayu Village Tea Co., Ltd. Co., Ltd., Fujian Zhenghe Ruiming Tea Co., Ltd., Fujian Longhe Tea Co., Ltd., and Fujian Songxi Ruiming Tea Co., Ltd. The main drafters of this document are. Sun Weijiang, Huang Yan, Zhang Lingzhi, Zou Tengyue, Sun Xinran, Shao Jingna, Zhang Yali, Lin Gang, Ning Jingming, Fu Yongxing, Zhang Fen, Chen Linhai, Zhuang Changqiang, Hao Lianqi, Zheng Zhiqiang, Lin Zhenchuan, Zhang Jialin, Luo Yuqin, Shang Hu, Zhou Xueqiu, Fu Mingfeng, Zhang Maoyu, Liu Honggang, Zhang Lixiong, Yu Bugui, Wei Xiaohui, Ye Hong, Yang Feng, and Zhou Kaiqi. Determination of origin of white tea by near infrared spectroscopy 1 Scope This document defines the terms and definitions for the use of near-infrared spectroscopy to identify the origin of white tea, and describes the use of near-infrared spectroscopy to identify the origin of white tea. Methods for origin identification, including principles, instruments and equipment, establishment and verification of near-infrared spectroscopy models, origin identification, model update and maintenance, and identification accuracy. This document is applicable to loose white tea products with a single origin, uniform variety, and the same category, and the identification date is no more than three years from the production date. Identify the origin of the product. 2 Normative references The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 8302 Tea Sampling GB/T 8303 Preparation of ground tea samples and determination of dry matter content GB/T 22291 White tea GB/T 32743 Technical Specification for White Tea Processing GB/T 37969 General rules for qualitative analysis by near-infrared spectroscopy 3 Terms and Definitions The terms and definitions defined in GB/T 22291, GB/T 37969 and the following apply to this document. 3.1 A certain number of representative white tea samples from different origins were collected, their near-infrared spectral characteristics were extracted, and chemometric methods were used to analyze the characteristics of the white tea. Establish an origin discrimination model based on feature information recognition. 3.2 Near-infrared spectral scanning was performed on white tea from different origins, and a near-infrared spectral data set library consisting of a certain number of white tea samples was established. Note. Divided into training set and validation set according to a certain ratio. 3.3 spectral training set spectraltrainingset A near-infrared spectral dataset used as a reference benchmark to train the discriminative model. 3.4 A near-infrared spectral data set used to evaluate the accuracy and repeatability of origin discrimination models. ......

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