|Standard Number||DS/ISO 19749:2021|
|Category||Test Method | Characterization | Measurement|
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 also applies to SEM-based size and shape measurements of larger than nanoscale particles.