Electroacoustics Tutorial 2

? Colloidal Dynamics 1999 Electroacoustics TutorialsParticle Size DistributionsAbstractDescribes methods of measuring and analyzing the Particle Size Distribution (PSD)in a colloidal suspension or emulsion.Table of Contents1 Introduction.....................................................................................22 Measuring the Particle Size Distribution.............23 Plotting the Particle Size Distribution.................................................3Colloidal Dynamics Pty Ltd, Australian Technology Park, Eveleigh (Sydney) NSW 1430 AustraliaColloidal Dynamics Inc, 11 Knight Street, Building E18, Warwick, RI 02886 USA www.colloidal-dynamics.com Page 1? Colloidal Dynamics 1999 Electroacoustics Tutorials1 IntroductionThe particles in a colloidal suspension or emulsion are seldom all of the same sizeand they often have varying shapes. Describing the size and shape is therefore asignificant problem. Emulsion droplets can usually be assumed to be spherical (solong as the distances between the droplets is large enough). For solid particles we often have to make do with general descriptions of shape likespheroidal, rod- or disk-shaped, even when the system contains individual particleswith other shapes.The particle size may also vary over quite a wide range. It is not unusual for theparticles of a suspension produced in a grinding operation, for example, to vary by afactor of 100 from the smallest to the largest size. To describe such ...