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Homepage>ISO Standards>ISO 22412:2017-Particle size analysis-Dynamic light scattering (DLS)
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download between 0-24 hoursReleased: 2017
ISO 22412:2017-Particle size analysis-Dynamic light scattering (DLS)

ISO 22412:2017

ISO 22412:2017-Particle size analysis-Dynamic light scattering (DLS)

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Standard´s number:ISO 22412:2017
Pages:34
Edition:2
Released:2017
Language:English
DESCRIPTION

ISO 22412:2017


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.