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