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Standard
ISO 33405
First edition
Reference materials — Approaches
2024-05
for characterization and assessment
of homogeneity and stability
Matériaux de référence — Approches pour la caractérisation et
l’évaluation de l’homogénéité et la stabilité
Reference number
ISO 33405:2024(en) © ISO 2024
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ISO 33405:2024(en)
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© ISO 2024
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Published in Switzerland
© ISO 2024 – All rights reserved
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ISO 33405:2024(en)
Contents Page
Foreword .vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 2
5 Conventions . 3
6 Overview of reference material production . 3
6.1 General .3
6.2 Summary of project design . . .3
6.3 Acquisition of starting material .5
6.4 Feasibility studies .6
6.5 Reference material processing .6
6.6 Homogeneity assessment .6
6.7 Stability assessment .6
6.8 Choice of measurement procedures .7
6.9 Metrological traceability .7
6.10 Characterization and uncertainty evaluation .
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