ISO 13320:2009 Preview

Particle size analysis -- Laser diffraction methods

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 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 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).


General information

  • Status :  Published
    Publication date : 2009-10
    Corrected version (en) : 2009-11
  • Edition : 1
    Number of pages : 51
  • :
    ISO/TC 24/SC 4
    Particle characterization
  • 19.120
    Particle size analysis. Sieving

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