ISO 19749:2021
Nanotechnologies - Measurements of particle size and shape distributions by scanning electron microscopy

Standard No.

ISO 19749:2021

Release Date

2021

Published By

International Organization for Standardization (ISO)

Latest

ISO 19749:2021

Scope

This document specifies methods of determining nanoparticle size and shape distributions by acquiring and evaluating scanning electron microscope images and by obtaining and reporting accurate results. NOTE 1 This document applies to particles with a lower size limit that depends on the required uncertainty and on the suitable performance of the SEM, which is to be proven first -according to the requirements described in this document. NOTE 2 This document applies also to SEM-based size and shape measurements of larger than nanoscale particles.

ISO 19749:2021 Referenced Document

• ISO 13322-1 Particle size analysis - Image analysis methods - Part 1: Static image analysis methods
• ISO 16700 Microbeam analysis - Scanning electron microscopy - Guidelines for calibrating image magnification
• ISO 26824 Particle characterization of particulate systems — Vocabulary*， 2022-08-08 Update
• ISO 9276-1 Representation of results of particle size analysis — Part 1: Graphical representation TECHNICAL CORRIGENDUM 1
• ISO 9276-2 Representation of results of particle size analysis - Part 2: Calculation of average particle sizes/diameters and moments from particle size distributions
• ISO 9276-3 Representation of results of particle size analysis - Part 3: Adjustment of an experimental curve to a reference model
• ISO 9276-5 Representation of results of particle size analysis - Part 5: Methods of calculation relating to particle size analyses using logarithmic normal probability distribution
• ISO 9276-6 Representation of results of particle size analysis - Part 6: Descriptive and quantitative representation of particle shape and morphology
• ISO/IEC 17025 General requirements for the competence of testing and calibration laboratories [Standard in French]
• ISO/IEC Guide 99 
• ISO/TS 24597:2011 Microbeam analysis - Scanning electron microscopy - Methods of evaluating image sharpness
• ISO/TS 80004-1 Nanotechnologies - Vocabulary - Part 1: Core terms
• ISO/TS 80004-2 Nanotechnologies - Vocabulary - Part 2: Nano-objects
• ISO/TS 80004-3 Nanotechnologies - Vocabulary - Part 3: Carbon nano-objects
• ISO/TS 80004-4 Nanotechnologies - Vocabulary - Part 4: Nanostructured materials
• ISO/TS 80004-6 Nanotechnologies - Vocabulary - Part 6: Nano-object characterization

ISO 19749:2021 history

• 2021 ISO 19749:2021 Nanotechnologies - Measurements of particle size and shape distributions by scanning electron microscopy