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GB/T 5491-2025 English PDF

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GB/T 5491-2025: Inspection of grain and oil seeds - Sampling and dividing

GB/T 5491: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 5491-2025	English	519	Add to Cart	5 days [Need to translate]	Inspection of grain and oil seeds - Sampling and dividing		GB/T 5491-2025
GB 5491-1985	English	205	Add to Cart	0--9 seconds. Auto-delivery	[GB/T 5491-1985] Inspection of grain and oilseeds. Methods for sampling and sample reduction	Valid	GB 5491-1985

Basic data

Standard ID	GB/T 5491-2025 (GB/T5491-2025)
Description (Translated English)	Inspection of grain and oil seeds - Sampling and dividing
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	B20/33
Classification of International Standard	67.060
Word Count Estimation	26,271
Date of Issue	2025-10-31
Date of Implementation	2026-05-01
Older Standard (superseded by this standard)	GB/T 5491-1985
Issuing agency(ies)	State Administration for Market Regulation and Standardization Administration of China

GB/T 5491-2025: Inspection of grain and oil seeds - Sampling and dividing

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 67.060 CCSB20;B33 National Standards of the People's Republic of China Replaces GB/T 5491-1985 Grain and oilseed testing sampling and subsampling methods Published on 2025-10-31 Implemented on May 1, 2026 State Administration for Market Regulation The State Administration for Standardization issued a statement.

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting. This document replaces GB/T 5491-1985 "Sampling and Divide Methods for Grain and Oilseed Inspection". Compared with GB/T 5491-1985, except for the conclusion... Aside from structural adjustments and editorial changes, the main technical changes are as follows. a) Added "Scope", "Terms and Definitions", and "General Requirements" (see Chapters 1, 3, and 4); b) Added "Manual Sampler" and "Ellis Cup Sampler" (see 5.1, 5.1.2.3); c) The manual sampler for packaged grain and the manual sampler for bulk grain have been modified (see 5.1.1, 5.1.2, and 1.1.1.1 in the 1985 edition). 1.1.1.2, 1.1.1.3, 1.2); d) An electric sampler was added (see 5.2); e) The provision that "not suitable for impurity testing" in the "electric suction sampler" section has been removed (see 1.1.2.3 of the 1985 edition); f) The "Number of Representative Inspection Units" has been changed (see 6.1, 2.1 of the 1985 edition); g) Added "Sampling Type" (see 6.2); h) Added "Static Sampling Method for Bulk Grains and Oilseeds" (see 6.3); i) The stratification, zoning, and sampling methods for bulk grain sampling on vehicles, ships, and warehouses have been modified (see 6.3.1, 1985 edition). 2.2.1); j) The zoning, stratification, and sampling methods for bulk grain sampling in round silos (such as shallow round silos, brick round silos, vertical silos, etc.) have been modified (see 6.3.2, (2.2.2 of the 1985 edition) k) The minimum number of sampling points and minimum laboratory sample size for mobile grain sampling have been increased (see 6.4); l) Added "Sampling Point Layout," "Sampling Quantity," and "Sampling Point and Sampling Method" to the "Static Sampling Method for Packaged Grains and Oils" (see 6.5.1). 6.5.2, 6.5.3); m) Added the "bell-shaped sampler method", "horizontal sampler method", "Canadian sampler method" and "automatic sampler method" (see 7.2~). 7.5). Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed by the National Food and Strategic Reserves Administration. This document is under the jurisdiction of the National Technical Committee on Standardization of Grain and Oil (SAC/TC270). This document was drafted by. Henan University of Technology, Standards and Quality Center of the National Food and Strategic Reserves Administration, and Beijing Institute of Food Inspection. (Beijing Municipal Food Safety Monitoring and Risk Assessment Center), Shandong Provincial Materials Reserve Management Center, China Grain Reserves Quality Inspection Center Co., Ltd., China Grain Reserves Corporation Grain Reserve Management Group Co., Ltd., Hubei Provincial Grain and Oil Food Quality Supervision and Testing Center, Heilongjiang Provincial Grain Quality and Safety Monitoring and Technology Center Shandong Provincial Grain and Oil Testing Center, China Grain Reserves Chengdu Storage and Research Institute Co., Ltd., China Grain Reserves Group Co., Ltd. Henan Branch, China Grain Reserves Corporation Henan Quality Inspection Center Co., Ltd., and Xiamen Customs of the People's Republic of China. The main drafters of this document are. Zhang Yurong, Yang Lifei, Zhou Xianqing, Zhang Dongdong, Wu Qiong, Han Jiajing, Shang Yan'e, Yang Weimin, Guo Qin, and Hu Xuechun. Wang Zhengyou, Zhang Zhihang, Xiong Ning, Ji Lanyang, Ren Lingyun, Lan Shengbin, Chen Jinying, Zhou Hongda, Wang Wei, Zhang Zhenmin. The release history of this document and the document it replaces is as follows. ---First published in 1985 as GB 5491-1985, it was changed from a mandatory national standard to a recommended national standard in.2017; ---This is the first revision. Grain and oilseed testing sampling and subsampling methods

1 Scope

This document defines the relevant terms and definitions for grain and oilseed sampling and subsampling, and specifies general requirements, sampling and subsampling tools, and sampling procedures. And sampling methods. This document applies to static and dynamic sampling and fractionation of grains and oilseeds.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. GB/T 5490 General Rules for Inspection of Grains and Oils LS/T 3545 Sample divider for inspection of grain and oil machinery LS/T 3547 Technical conditions and test methods for electric bulk grain samplers for grain and oil machinery LS/T 3548 Technical conditions and test methods for electric suction-type grain samplers used in grain and oil machinery packaging

3 Terms and Definitions

The terms and definitions defined in GB/T 5490 and the following terms and definitions apply to this document. 3.1 inspection lot A one-time delivery of grains and/or oilseeds with the same properties, as described in the contract or transport document. Note. This generally refers to grains or oilseeds of the same type, year, batch, grade, transportation unit, or storage unit. 3.2 inspection unit An inspection unit is defined within an inspection lot. 3.3 sampling The process of obtaining representative samples using appropriate tools and prescribed methods. 3.4 Dividing Using appropriate tools, the aggregated sample is thoroughly mixed and then progressively reduced to obtain the submitted sample, retained sample, laboratory sample, and test sample. The sample processing. 3.5 static sampling The sampling process when the object being tested is in a static state. 3.6 dynamicsampling The sampling process in which the tested object is in a flowing state.

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