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Full Description

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 um to 3 mm. With special instrumentation and conditions, the applicable size range can be extended above 3 mm and below 0,1 um.

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).

 

Document History

  1. ISO 13320:2009

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    Particle size analysis - Laser diffraction methods

    • Most Recent
  2. ISO 13320-1:1999


    Particle size analysis -- Laser diffraction methods -- Part 1: General principles

    • Historical Version