BS ISO 19749:2021

This standard BS ISO 19749:2021 Nanotechnologies. Measurements of particle size and shape distributions by scanning electron microscopy is classified in these ICS categories:

• 07.120 Nanotechnologies

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.