GB/T 19077-2016: Particle size analysis -- Laser diffraction methods

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Scope

This Standard 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 Standard is applicable to particle sizes ranging from approximately 0.1μm to 3 mm. With
special instrumentation and conditions, the applicable size range can be extended above 3 mm
and below 0.1μm.
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).

Basic Data

Standard ID	GB/T 19077-2016 (GB/T19077-2016)
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	47,494
Date of Issue	2016-02-24
Date of Implementation	2016-06-01
Older Standard (superseded by this standard)	GB/T 19077.1-2008
Quoted Standard	ISO 9276-1; ISO 9276-2; ISO 9276-4; ISO 14887; ISO 14488
Adopted Standard	ISO 13320-2009, IDT
Regulation (derived from)	National Standard Announcement No
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This standard specifies a method for the analysis of particle size distributions, including powders, sprays, aerosols, suspensions, emulsions, and bubbles in liquids, by analyzing the light scattering properties of the particles in a variety of biphasic systems. This standard applies to particle size range of 0.1��m ~ 3 mm particle size distribution measurement, suitable for the performance evaluation of related instruments. The particle size distribution can be extended to 0.1 ��m or less or 3 mm or more using some specially designed instruments and some auxiliary conditions. The technique assumes that the particles are spherical in the optical model, and therefore the reported particle size distribution for non-spherical particles is well matched by the theoretical value of the spherical particle scattering pattern volume and the measured scattering pattern values, and the result of the particle size distribution may be related to Based on other physical principles such as settlement, screening and so on