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GB/T 41948-2022 English PDF

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GB/T 41948-2022: Particle characterization - Sample preparation
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PDF similar to GB/T 41948-2022


Standard similar to GB/T 41948-2022

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Basic data

Standard ID GB/T 41948-2022 (GB/T41948-2022)
Description (Translated English) Particle characterization - Sample preparation
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard A28
Classification of International Standard 19.120
Word Count Estimation 22,222
Date of Issue 2022-12-30
Date of Implementation 2023-04-01
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 41948-2022: Particle characterization - Sample preparation

---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 19.120 CCSA28 National Standards of People's Republic of China Particle Characterization Sample Preparation Posted on 2022-12-30 2023-04-01 Implementation State Administration for Market Regulation Released by the National Standardization Management Committee

table of contents

Preface III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms, definitions and symbols 1 3.1 Terms and Definitions 1 3.2 Symbol 2 4 General 2 5 sample 3 5.1 Overview 3 5.2 Sample acquisition 4 5.3 Sample division 4 5.4 Minimum measurement sample size 5 6 sample preparation 6 6.1 Sample preparation link 6 6.2 Selection of dispersion medium 6 6.3 Selection of decentralized methods 7 6.4 Concentration adjustment of samples to be tested 8 7 Sample Transfer 9 Appendix A (Informative) Classification of Particle Dispersion Systems 10 Appendix B (Informative) Methods of Obtaining Common Samples 11 Appendix C (Informative) Decomposition method of commonly used powder samples 12 Appendix D (informative) Surfactants commonly used in particle dispersion 14 Appendix E (informative) Practical steps for dispersing powders in liquids 16 Reference 17

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 contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents. This document was proposed and managed by the National Particle Characterization and Sorting and Sieve Mesh Standardization Technical Committee (SAC/TC168). This document is drafted by. Shenzhen Defang Nano Technology Co., Ltd., Hefei Hongmeng Standard Technology Research Institute Co., Ltd., Shandong Li University of Technology, Jinan Micro-Nano Particle Instrument Co., Ltd., Institute of Process Engineering, Chinese Academy of Sciences, South China University of Technology, Opt Technology (Shanghai) Sea) Co., Ltd., Shanghai Second Polytechnic University, Chongqing Institute of Science and Technology, Beijing Institute of Metrology and Testing Sciences, Guangzhou Huifu Research Institute Co., Ltd. Division, China Jiliang University, Research Institute of Exploration and Development of Daqing Oilfield Co., Ltd., Institute of Analysis and Testing of Beijing Academy of Science and Technology (Northern Beijing Physical and Chemical Analysis and Testing Center), China Institute of Atomic Energy, Beijing Oriental Institute of Metrology and Testing. The main drafters of this document. Xu Renliang, Wang Yuanhang, Li Li, Liu Wei, Ren Fei, Li Zhaojun, Liu Qing, Shen Jin, Sun Yan, Tian Zhen, Liao Xiaoling, Zhao Xiaoning, Wu Chunlei, Yu Mingzhou, Xu Xiqing, Xu Wenfeng, Gao Yuan, Jin Qingqing, Qiu Zhiping, Wei Yansong, Gao Zhiliang, Zhou Lan.

Introduction

Granular materials play an important role in many fields of the national economy. In the research and development, preparation, production and application of granular materials, all Characterization of particle properties is inseparable. Characterization techniques include but are not limited to static or dynamic light scattering, electrical resistance, photoresisting, static or dynamic Image method, ultrasonic method, gravity or centrifugal sedimentation method, gas permeation method, gas adsorption method, etc. In addition to the need for various characterization techniques and analytical instruments In addition to standardization, the standardization of particle characterization sample preparation process (including sampling, sample preparation and sample transfer, etc.) is also crucial. suitable and Proper sample preparation is a must for correct particle characterization. This document is intended to establish procedures for the preparation of samples for particle characterization. Procedures to guide particle testers to obtain the correct sample to be tested. Particle Characterization Sample Preparation

1 Scope

This document establishes procedures for the preparation of samples for the characterization of granular materials, and specifies the operational methods and procedures for sampling, sample preparation, and sample transfer. Require. This document applies to powders with a particle size of less than 10 mm, solid particles in liquid media, and liquid particles in liquid media. sample preparation.

2 Normative references

This document has no normative references. 3 Terms, definitions and symbols 3.1 Terms and Definitions The following terms and definitions apply to this document. 3.1.1 Surfactants A class of substances that reduce the interfacial energy of materials in contact with liquids. [Source. ISO /T S22107.2021, 3.16, with modifications] 3.1.2 Dispersant Additives that increase and improve the dispersion properties of solid or liquid materials. 3.1.3 Wetting agent wetting agent A surfactant solution or solvent that makes a material more wettable by lowering the surface energy of a solid material. 3.1.4 polydisperse polydisperse A feature that has different values for a property of different particles in a granular system. 3.1.5 Aggregate New particles formed by strongly bound or fused particles may have an outer surface area significantly smaller than the sum of the individual particle surface areas. Note 1.The forces supporting aggregates are all strong forces, such as covalent bonds or originating from sintering or complex physical entanglement, or primary particles combined in other ways. Note 2.Aggregates are also called "secondary particles", while primary particles are called "primary particles". [Source. ISO 26824.2013,1.3] 3.1.6 Agglomerates agglomerate Particles held together by weak to moderate forces having an external surface area approximately equal to the sum of the surface areas of the individual particles. NOTE 1.The forces supporting the aggregates are all weak forces, such as van der Waals forces or simple physical entanglements.

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