Standard Number | ČSN EN ISO 19749: 2023 |
---|---|
Organization |
Czech Standardization Agency
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Level | National |
Category | Test Method | Characterization | Measurement |
Status |
|
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.