10.5 Colloid, Dispersion phase and dispersion medium · Part 3

this method for the preparation of non aqueous inflammable liquids like pentane, ether and benzene, etc using high frequency alternating current which prevents the decomposition of liquid. (iii) Ultrasonic dispersion Sound waves of frequency more than 20kHz (audible limit) could cause transformation of coarse suspension to colloidal dimensions. Water Oil Mercury Quartz generator Electrical oscillator Figure : . Ultrasonic dispersion Claus obtained mercury sol by subjecting mercury to sufficiently high frequency ultrasonic vibrations.