Powdered substances are produced and sold in large quantities for a wide range of applications. Nano forms are also used, for example as pigments, fillers or in matrix materials, which requires corresponding registration.

However, the characterisation of the granulometric properties of nano powders is often difficult due to their tendency to agglomerate or aggregate. Moreover, in contrast to nanoforms in suspension, e.g. for medical applications, these powders usually have a broad particle size distribution and their shape is not spherical. The consequences this can have in practice will be explained by way of introduction, both from a metrological and a regulatory point of view.

The calculation of the volume-specific surface area (VSSA) is based on the mass-specific (BET) surface area of the powder and the pure density of the substance. The measurement procedures are described in OECD Test Guideline 124 and are the focus of our event.

For examples from (industrial) practice and their experiences with the registration of nano powders, we have invited a speaker.

We also want to include your questions and your use case. If you have specific questions or constellations, please send them to us at akademie@bam.de by 18.01.2024. We will then address them in detail. You are also welcome to submit your questions spontaneously during the lecture.