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GB/T 44223-2024 English PDF

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GB/T 44223-2024: Nanotechnologies - Technical requirements for dynamic light scattering particle size analyzers
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PDF similar to GB/T 44223-2024


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Basic data

Standard ID GB/T 44223-2024 (GB/T44223-2024)
Description (Translated English) Nanotechnologies - Technical requirements for dynamic light scattering particle size analyzers
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard N51
Classification of International Standard 17.040.30
Word Count Estimation 18,136
Date of Issue 2024-07-24
Date of Implementation 2025-02-01
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 44223-2024: Nanotechnologies - Technical requirements for dynamic light scattering particle size analyzers


---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.
Nanotechnologies - Technical requirements for dynamic light scattering particle size analyzers Nanotechnology Dynamic Light Scattering Particle size analyzer technical requirements Nanotechnologies-Technical requirements for dynamic light scattering particle size analyzers ICS 17.040.30 CCS N51 National Standard of the People's Republic of China Released on 2024-07-24 2025-02-01 Implementation State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface ... 1 Scope ... 2 Normative referenced documents ... 3 Terms and Definitions ... 4 Working principle and structure ... 5 Technical requirements ... 6 Normal working conditions ... 7 Inspection items and test methods ... Appendix A (Informative) Particle Size Standard Samples ... Appendix B (Informative) Sample Preparation Method ... References ...

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 is required. 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 was proposed by the Chinese Academy of Sciences. This document is under the jurisdiction of the National Technical Committee on Nanotechnology Standardization (SAC/TC 279). This document was drafted by. National Center for Nanoscience and Technology, China Institute of Metrology, Beijing Academy of Science and Technology Analysis and Testing Research Institute (Beijing Physical and Chemical Analysis and Testing Center), Zhuhai Zhenli Optical Instrument Co., Ltd., Dandong Better Instrument Co., Ltd., South China Normal University Jinan Micro-Nano Particle Instrument Co., Ltd., Zhuhai OMEC Instrument Co., Ltd., Hefei Hongmeng Standard Technology Research Institute Co., Ltd., Guangzhou Special Pressure Equipment Testing Institute, Shanghai Spectris Instrument Systems Co., Ltd., Cold Energy (Guangdong) Technology Co., Ltd., China Metrology University, Shandong University of Technology, Beijing Xinlifang Technology Development Co., Ltd., Chengdu Jingxin Powder Testing Equipment Co., Ltd., Antai Technology Co., Ltd., Anton Paar (Shanghai) Trading Co., Ltd., China National Accreditation Service for Conformity Assessment, Beijing Powder Technology Association, China Particle Society. The main drafters of this document are. Zhu Xiaoyang, Gao Jie, Liu Junjie, Huang Lu, Gao Yuan, Zhang Fugen, Dong Qingyun, Ning Hui, Han Peng, Ren Fei, Xingzhi Shen, Xiaoliang Dou, Zongjie Yin, Xiaoyu Li, Bin Liu, Mingzhou Yu, Wei Liu, Yawei Niu, Yixin Zhou, Yanping Li, Xudong Song, Li Xiao, Xu Yan, Wang Ning, Zhou Suhong, and Han Xiuzhi. Nanotechnology Dynamic Light Scattering Particle size analyzer technical requirements

1 Scope

This document gives the principle of dynamic light scattering particle size analyzer, and specifies its performance, power supply voltage adaptability, environmental adaptability, safety and other aspects. It specifies the technical requirements for safety, mechanical structure, test conditions, etc., and describes the test methods for accuracy and repeatability. This document is applicable to the testing and inspection of particle size analyzers that measure the average particle size, particle size distribution and other parameters of nano- and submicron-sized particles. Testing, operation and maintenance.

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. document. GB/T 29022-2021 Particle size analysis Dynamic light scattering (DLS) GB/T 30544.6-2016 Nanotechnology Terminology Part 6.Characterization of Nanoobjects JJG 1104-2015 Dynamic Light Scattering Particle Size Analyzer

3 Terms and definitions

The terms and definitions defined in GB/T 29022-2021, GB/T 30544.6-2016 and the following apply to this document. 3.1 Average hydrodynamic diameter xDV The hydrodynamic diameter reflects the median of the particle size distribution. Note 1.The average particle size can be directly determined without calculating the particle size distribution, or from the intensity-weighted distribution, volume-weighted distribution or number-weighted distribution, and The exact meaning of the average particle size is related to the calculation method. Note 2.The cumulant method gives the harmonic mean particle size weighted by the scattered light intensity, sometimes also called the Z-mean particle size. Note 3.According to ISO 9276﹘2, arithmetic, geometric and harmonic means can also be calculated from the particle size distribution. NOTE 4 The mean values calculated from the density function (linear coordinates) and the transformed density function (logarithmic coordinates) may differ significantly (see ISO 9276﹘1). xDLS Note 5.Dependent on particle shape and scattering vector (and hence on detection angle, laser wavelength and refractive index of the suspension medium). Note 6.Also known as average particle size. [Source. GB/T 29022-2021, 3.2] 3.2 Polydispersity index; PI A dimensionless quantity used to describe the width of the particle size distribution. Note. For monodisperse spherical particle samples, the PI is usually less than 0.07. [Source. GB/T 29022-2021, 3.3]

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