GB/T 42208-2022 in English

VALID

Nanotechnologies—Measurement of nanoparticle size in multiphase system—Image method of transmission electron microsopy

Issued on:2022-12-30
Implemented on:2023-07-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $250.00
$243.00

Standard No:	GB/T 42208-2022
Document status:	VALID
Title in English:	Nanotechnologies—Measurement of nanoparticle size in multiphase system—Image method of transmission electron microsopy
Title in Chinese:	纳米技术多相体系中纳米颗粒粒径测量透射电镜图像法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2022-12-30
Implemented on:	2023-07-01
ICS Classification:	17.180.01-Optics and optical measurements in general
Chinese Classification:	N33-Electron optics and other physical optics instrument
Professional Classification:	GB-National Standard
Related Keywords:	multiphase system image method transmission electron microscope image method image method particle size measurement image acquisition
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《GB/T 42208-2022纳米技术多相体系中纳米颗粒粒径测量透射电镜图像法》由TC279（全国纳米技术标准化技术委员会）归口，主管部门为中国科学院。

Introduction

1. Standard Overview

This standard (GB/T 42208-2022) specifies the method for measuring the particle size of nanoparticles in multiphase systems using the transmission electron microscope image method, which is applicable to the measurement of nanoparticles in solid phases, colloids and biological tissues. The standard elaborates on sample preparation, test steps, particle size measurement and uncertainty analysis.

2. Background of Standard Formulation

With the rapid development of nanotechnology, nanomaterials have been widely used in many fields. However, the particle size measurement of nanoparticles has always been a difficult point, especially in multiphase systems. This standard solves this problem through the transmission electron microscope (TEM) image method, providing unified technical specifications for scientific research and industrial applications.

3. Comparison of standard frameworks

Standard dimensions	GB/T 42208-2022	Comparison of international standards
Scope of application	Measurement of nanoparticles in multiphase systems	ISO/TS 23096:2017 (Nanotechnology - Determination of particle size distribution)
Core methods	Transmission electron microscopy imaging method	Small angle X-ray scattering (SAXS), dynamic light scattering (DLS)
Measurement accuracy	±5% (particle size range 1-100nm)	±10% (SAXS method), ±8% (DLS method)

4. Implementation Suggestions

4.1 Notes on sample preparation

During the sample preparation process, pay attention to the following points:

Ensure that the sample structure maintains the original state of the multiphase system;
The thickness of the transmission electron microscope sample is generally 50-100nm;
Avoid oxidation and contamination, and store in a dry place.

4.2 Recommendations for image acquisition and processing

During image acquisition and processing, the following steps are recommended:

Choose appropriate imaging technology (bright field, dark field, or high-angle annular dark field) according to the sample type;
Ensure image clarity and contrast, and take multiple images of different areas;
Use automated thresholding to reduce user bias and improve measurement accuracy.

More samples: JGJ 94-2008 JC/T 2453-2018 JJG 21-2008

Sample only — not a preview of GB/T 42208-2022

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