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ISO 13320:2020

Current Revision

Particle size analysis - Laser diffraction methods

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This document provides guidance on instrument qualification and size distribution measurement of particles in many two-phase systems (e.g. powders, sprays, aerosols, suspensions, emulsions and gas bubbles in liquids) through the analysis of their light-scattering properties. It does not address the specific requirements of particle size measurement of specific materials.

This document is applicable to particle sizes ranging from approximately 0,1 µm to 3 mm. With special instrumentation and conditions, the applicable size range can be extended above 3 mm and below 0,1 µm.

For spherical and non-spherical particles, a size distribution is reported, where the predicted scattering pattern for the volumetric sum of spherical particles matches the measured scattering pattern. This is because the technique assumes a spherical particle shape in its optical model. For non-spherical particles the resulting particle size distribution is different from that obtained by methods based on other physical principles (e.g. sedimentation, sieving).


SDO ISO: International Organization for Standardization
Document Number ISO 13320
Publication Date Not Available
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO/TC 24/SC 4
Publish Date Document Id Type View
Not Available ISO 13320:2020 Revision