International Standard
ISO 13320:2020
Particle size analysis — Laser diffraction methods
Reference number
ISO 13320:2020
Edition 2
2020-01
International Standard
Read sample
ISO 13320:2020
69111
Published (Edition 2, 2020)

ISO 13320:2020

ISO 13320:2020
69111
Language
Format
CHF 194
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Abstract

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).

General information

  •  : Published
     : 2020-01
    : International Standard published [60.60]
  •  : 2
     : 59
  • ISO/TC 24/SC 4
    19.120 
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