Partners save 15% on every standard

Valid

GB/T 45884-2025White tea origin discrimination — Near infrared spectral method (English PDF)

白茶产地判别　近红外光谱法

Open the GB/T 45884-2025 preview as PDF

Preview — first pages of GB/T 45884-2025 (full document: 15 pages)

This is a limited preview

Buy now to download the full PDF (15 pages)

Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

June 30, 2025

Implementation date

October 1, 2025

Scope

GB/T 45884-2025 is the English-translated version of 白茶产地判别　近红外光谱法.

GB/T 45884-2025 is the Chinese national standard covering telling where a white tea was grown without a chemical assay — the near infrared principle, the instrument and its settings, the reference sample set split into a training set and a validation set, the building and verification of the discrimination model, the origin determination itself, the model update and maintenance without which a model drifts as new crops come in, and the accuracy of the discrimination. It applies to loose white tea of a single origin and one grade, no more than three years from the production date. First edition, under the All China Federation of Supply and Marketing Cooperatives. In force from 1 October 2025. Issued on 30 June 2025, it has been in force since 1 October 2025.

Document preview — GB/T 45884-2025

National Standard of the People's Republic of China

ICS: 67.140.10
Classification: X 55

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

PrefaceIII
1 Scope1
2 Normative references1
3 Terms and Definitions1
4 Principle2
5 Instruments and Equipment2
6 Establishment and verification of near-infrared spectroscopy model2
7 Origin determination3
8 Model Update and Maintenance3
9 Accuracy of discrimination3
10 Discrimination Example4
Appendix A (Informative) Example of Identifying the Origin of Fuding White Tea5

Foreword

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

GB/T 8302

GB/T 8303

GB/T 22291

GB/T 32743

GB/T 37969

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 Establish an origin discrimination model based on feature information recognition

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.

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.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 8302 · GB/T 8303

Editions of GB/T 45884

Edition	Title	Revision	Status
GB/T 45884-2025	White tea origin discrimination - Near infrared spectral method	current edition	Current

This page sells the current edition, GB/T 45884-2025. Earlier editions are listed for reference only.

How to Buy GB/T 45884-2025

1Add to cart. Click the "Buy GB/T 45884-2025" button on this page. You can add more standards before checkout.
2Checkout. Enter your email and billing details. Payment is processed securely by Stripe (cards, Apple Pay, Google Pay supported).
3Instant delivery (0–9 sec). Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
4Invoice included. A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.