Ultrasonic Measurements in Particle Size Analysis
Particle Size Analysis
Published Online: 15 SEP 2006
Copyright © 2000 John Wiley & Sons, Ltd. All rights reserved.
Encyclopedia of Analytical Chemistry
How to Cite
McClements, D. J. 2006. Ultrasonic Measurements in Particle Size Analysis. Encyclopedia of Analytical Chemistry. .
- Published Online: 15 SEP 2006
The particle size distribution and concentration of a colloidal dispersion can be determined by measuring its ultrasonic velocity and/or attenuation coefficient as a function of frequency and then using a suitable mathematical model to interpret the spectra. Ultrasonic spectroscopy can be used to analyze particle sizes between about 10 nm and 1000 µm, and is suitable for application to concentrated systems (often up to 50 wt%). This technique has considerable advantages over many alternative technologies because it can be applied to systems that are optically opaque without the need of any sample preparation.