ISO 22412:2017

Particle size analysis — Dynamic light scattering (DLS)

Standard Details

ISO 22412:2017 specifies the application of dynamic light scattering (DLS) to the measurement of average hydrodynamic particle size and the measurement of the size distribution of mainly submicrometre-sized particles, emulsions or fine bubbles dispersed in liquids. DLS is also referred to as "quasi-elastic light scattering (QELS)" and "photon correlation spectroscopy (PCS)," although PCS actually is one of the measurement techniques.

ISO 22412:2017 is applicable to the measurement of a broad range of dilute and concentrated suspensions. The principle of dynamic light scattering for a concentrated suspension is the same as for a dilute suspension. However, specific requirements for the instrument setup and specification of test sample preparation are required for concentrated suspensions. At high concentrations, particle-particle interactions and multiple light scattering can become dominant and can result in apparent particle sizes that differ between concentrated and dilute suspensions.

General Information

Status : Published

Standard Type: Main

Document No: ISO 22412:2017

Document Year: 2017

Pages: 34

Edition: 2

Section Volume:
ISO/TC 24/SC 4. Particle characterization

ICS:
19.120 Particle size analysis. Sieving

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ISO 22412:2017

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ISO 22412:2008

ISO 22412:2017

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