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ISO 20998-2:2022

Measurement and characterization of particles by acoustic methods - Part 2: Linear theory
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ISO 20998-2:2022

Measurement and characterization of particles by acoustic methods - Part 2: Linear theory

PUBLISH DATE 2022
ISO 20998-2:2022

This document specifies requirements for ultrasonic attenuation spectroscopy methods for determining the size distributions of a particulate phase dispersed in a liquid at dilute concentrations, where the ultrasonic attenuation spectrum is a linear function of the particle volume fraction.

In this regime particle-particle interactions are negligible. Colloids, dilute dispersions, and emulsions are within the scope of this document.

The typical particle size for such analysis ranges from 10 nm to 3 mm, although particles outside this range have also been successfully measured.

For solid particles in suspension, size measurements can be made at concentrations typically ranging from 0.1 % by volume up to 5 % by volume, depending on the density contrast between the solid and liquid phases, the particle size, and the frequency range[9],[10].

For emulsions, measurements can be made at much higher concentrations.

These ultrasonic methods can be used to monitor dynamic changes in the size distribution.

SDO ISO: International Organization for Standardization
Document Number ISO 20998
Publication Date Aug. 1, 2022
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO/TC 24/SC 4
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