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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 5502-2025 | English | 179 |
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Inspection of grain and oils - Determination of milling degree of rice and other grain kernels
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GB/T 5502-2025
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| GB/T 5502-2018 | English | 199 |
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Inspection of grain and oils -- Determination of milling degree of rice
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GB/T 5502-2018
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| GB/T 5502-2008 | English | 239 |
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Inspection of grain and oils -- Determination of processing degree of rice and other grain kernels
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GB/T 5502-2008
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| GB/T 5502-1985 | English | 199 |
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Inspection of grain and oilseeds--Methods for determination of processing degrees of rice and other grain kernels
| Obsolete |
GB/T 5502-1985
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Basic data | Standard ID | GB/T 5502-2025 (GB/T5502-2025) | | Description (Translated English) | Inspection of grain and oils - Determination of milling degree of rice and other grain kernels | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | X04 | | Classification of International Standard | 67.040 | | Word Count Estimation | 9,992 | | Date of Issue | 2025-10-31 | | Date of Implementation | 2026-05-01 | | Older Standard (superseded by this standard) | GB/T 5502-2018 | | Issuing agency(ies) | State Administration for Market Regulation and Standardization Administration of China | GB/T 5502-2025: Inspection of grain and oils - Determination of milling degree of rice and other grain kernels
---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 67.040
CCSX04
National Standards of the People's Republic of China
Replaces GB/T 5502-2018
Grain and oil inspection, rice processing precision inspection
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 5502-2018 "Grain and Oil Inspection. Rice Processing Precision Inspection". Compared with GB/T 5502-2018, except for the following.
Aside from structural adjustments and editorial changes, the main technical changes are as follows.
---The scope of application has been changed (see Chapter 1, Chapter 1 of the.2018 edition);
---Added terms and definitions for the processing precision of milky white grains and millet (see 3.3, 3.4);
---Added a description of the principle of the direct observation method (see 4.4);
---Reagents and materials have been changed (see Chapter 5, Chapter 5 of the.2018 edition);
---The shelf life of the staining stock solution and staining agent has been increased (see 5.5, 5.6);
---The instruments and equipment have been changed (see Chapter 6, Chapter 6 of the.2018 edition);
---The eosin-γ-methylene blue staining method has been modified (see 8.1.1,.2018 version 8.1);
---The instrument-assisted detection method and its result interpretation have been deleted (see sections 8.2.2 and 9.1.2 in the.2018 version);
---Added inspection methods for the processing precision of sorghum and millet (see 8.2, 8.3);
---The representation of rice processing precision results has been changed (see 9.1.3, 9.2 in the.2018 version);
---Added calculation and description of the processing accuracy results for sorghum and millet (see 9.2, 9.3).
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. Beijing Guomao Dongfu Engineering Technology Co., Ltd., the National Academy of Food and Strategic Reserves Administration, and China Grain Reserves Corporation.
Inspection Center Co., Ltd., Hubei Provincial Grain and Oil Food Quality Supervision and Inspection Center, Liaoning Provincial Grain and Material Reserve Affairs Service Center, Anhui Provincial Grain
Oil product quality supervision and testing station, Jilin Provincial Grain and Oil Hygiene Inspection and Monitoring Station.
The main drafters of this document are. Gao Yan, Hu Bin, Shi Cuixia, Wang Jiaya, Shan Xiaoxue, Ni Shanshan, Fan Yifan, Shi Jiayuan, Zhang Yue, and Ji Jialu.
Min Guochun, Zhang Yadi, Liu Fangfang, Lu Xuerui, Sun Yuting, Zhang Cheng, Wu Lili, Yang Huining, Li Shupeng, Zou Jie, Jiang Tao, Zhang Yuchong.
The release history of this document and the document it replaces is as follows.
---First published in 1985 as GB/T 5502-1985, revised for the first time in.2008, and revised for the second time in.2018;
---This is the third revision.
Grain and oil inspection, rice processing precision inspection
1 Scope
This document describes a method for inspecting the processing accuracy of rice.
This document applies to the inspection of the processing precision of rice, sorghum, and millet.
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 1354 Rice
GB/T 5491 Sampling and Divided Sampling Methods for the Inspection of Grains and Oils
GB/T 6682 Specifications and test methods for water used in analytical laboratories
GB/T 11766 Xiaomi
LS/T 3215 Sorghum Rice
LS/T 15121 Standard Sample for Precision Milling of Indica Rice
LS/T 15122 Standard Sample for Processing Precision of Indica Rice Suitable for Milling
LS/T 15123.1 Standard Sample for Fine Milling of Japonica Rice
LS/T 15123.2 Standard Sample for Processing Precision of Japonica Rice
3 Terms and Definitions
The terms and definitions defined in GB/T 1354, GB/T 11766, and LS/T 3215, as well as the following terms and definitions, apply to this document.
3.1
Image acquisition
The process of acquiring images of samples and converting the image information into information that the system can recognize.
3.2
Image analysis
The process of using mathematical methods to determine and analyze the acquired image information.
3.3
Milky white particles undermiledkernel
The pericarp has been mostly removed, and the seed coat has been removed to remove more than two-thirds of the whole sorghum grain.
3.4
The degree to which the outer layer of the millet has been removed.
Note. The percentage of millet grains in the sample with the outer skin layer basically removed is expressed.
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GB/T 5502-2025: Inspection of grain and oils - Determination of milling degree of rice and other grain kernels
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