ISO 20998-2:2013 PDF

Scope: This part of ISO 20998 describes 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 part of ISO 20998. 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 % volume fraction up to 5 % volume fraction, depending on the density contrast between the solid and liquid phases,the particle size,and the frequency range.

ISO 20998-2:2013 Referenced Document

ISO 14488:2007 Particulate materials - Sampling and sample splitting for the determination of particulate properties
ISO 20998-1:2006 Measurement and characterization of particles by acoustic methods - Part 1: Concepts and procedures in ultrasonic attenuation spectroscopy

2022 ISO 20998-2:2022 Measurement and characterization of particles by acoustic methods — Part 2: Linear theory
2013 ISO 20998-2:2013 Measurement and characterization of particles by acoustic methods.Part 2: Guidelines for linear theory