GB/T 19077-2024: Particle size analysis - Laser diffraction methods

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Scope

This Document provides guidance on instrument qualification and size distribution
measurement of particles (e.g. powders, sprays, aerosols, suspensions, emulsions and gas
bubbles in liquids) in many two-phase systems 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).

Basic Data

Standard ID	GB/T 19077-2024 (GB/T19077-2024)
Description (Translated English)	Particle size analysis - Laser diffraction methods
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	A28
Classification of International Standard	19.120
Word Count Estimation	53,529
Date of Issue	2024-10-26
Date of Implementation	2025-05-01
Older Standard (superseded by this standard)	GB/T 19077-2016
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration