What is ISO/TS 21357 - Mean size of nano-objects about?
Dispersions of nanoparticles in liquids are widely used in industry. ISO/TS 21357 describes a standardized method for evaluating the mean equivalent particle diameter in various sample types (including as-received samples) having a wide range of concentrations using the static multiple light scattering (SMLS) ) techniques.
ISO/TS 21357 provides guidance and requirements for the determination of the mean (spherical) equivalent diameter of nano-objects (i.e. particles, droplets or bubbles) dispersed in liquids. The technique in ISO/TS 21357 is applicable to a wide range of materials and does not require dilution of concentrated samples.
Who is ISO/TS 21357 - Mean size of nano-objects for?
ISO/TS 21357 on the mean size of nano-objects is useful for:
- Nanotechnologies researchers
- Nanotechnology companies
- Nanotechnology supply chains
- The global market of nano-enabled products
- Test centres for nanotechnology
- Regulatory authorities
Why should you use ISO/TS 21357 - Mean size of nano-objects?
Nanoparticles dispersed in liquids interact via a variety of weak and strong forces, which can lead to aggregation or agglomeration of objects (primary particles, agglomerates, aggregates, etc.). As a result, the dispersion state and the apparent mean particle size and size distribution can differ from those determined during product manufacturing, storage, and processing, particularly when using measurements requiring sample dilution or extensive preparation. Sample preparation can result in the breaking or formation of aggregates or agglomerates and some cases can also affect the morphology of primary particles.
ISO/TS 21357 discusses terms, definitions, symbols and abbreviated terms that depict a user-friendly idea of nano-objects and the SMLS technique. ISO/TS 21357 also provides users with the principles and measurement procedures that contribute to the performance characteristics of nano-objects.
The guidelines in ISO/TS 21357 help you evaluate the mean size of nano-objects that enables you to provide a superior quality product to your users.