Published
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.
PUBLISHED
ISO 19749:2021
90.20
Standard under periodical review
Jul 15, 2026
Nanotechnologies - Measurements of particle size and shape distributions by scanning electron microscopy (ISO 19749:2021)
60.60 Standard published
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