GB/T 29022-2021 Active National standards

GB/T 29022-2021 Particle size analysis—Dynamic light scattering (DLS)

Publish Date: 2021-12-31 Implement Date: 2022-07-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 29022-2021

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Screening, sieve plates, and sieve nets

ICS Name: Granularity analysis and sieving

Publish Date: 2021-12-31

Implement Date: 2022-07-01

Pages: 31 pages

Scope

This document specifies the method of using dynamic light scattering (DLS) to measure the average hydrodynamic diameter and particle size distribution of submicron-sized particles, emulsions, or fine bubbles dispersed in liquids. DLS is also known as "quasi-elastic light scattering (QELS)" and "photon correlation spectroscopy (PCS)", although photon correlation spectroscopy is actually one of the measurement techniques. This document is applicable to the measurement of dilute and concentrated suspensions over a wide concentration range. When measuring high and low concentration samples, DLS uses the same measurement principle, but high concentration samples have special requirements for instrument construction and sample preparation. In the high concentration state, the dominant effects of particle-particle interaction and multiple scattering will appear, resulting in significant differences in the particle size measurement results of high and low concentration samples.