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ISO 13320:2009

Particle size analysis -- Laser diffraction methods

General information
Withdrawn from 06.01.2020
Directives or regulations
None
Standard history
Status
Date
Type
Name
06.01.2020
Main
18.09.2009
Main
Main
ISO 13320-1:1999
ISO 13320:2009 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. ISO 13320:2009 is applicable to particle sizes ranging from approximately 0,1 �m to 3 mm. With special instrumentation and conditions, the applicable size range can be extended above 3 mm and below 0,1 �m. For 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. The resulting particle size distribution is different from that obtained by methods based on other physical principles (e.g. sedimentation, sieving).
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