Colloidal systems ISO 13099-3

Colloidal systems — Methods for zeta potential determination —Colloidal systems — Methods for zeta potential determination —Colloidal systems — Methods for zeta potential determination —

Colloidal systems — Methods for zeta potential determination —

ISO 13099-3

Zeta potential is a parameter that can be used to predict the long term stability of suspensions and
emulsions, and to study surface morphology and surface adsorption of particles and other surfaces
in contact with a liquid. Zeta potential is not a directly measurable parameter. It can be determined
using appropriate theoretical models from experimentally determined parameters, which depend on
electric charge separation at interfaces. “Electrokinetic phenomena” encompass such experimentally
observed effects. A group of electrokinetic phenomena at high frequency on MHz scale is referred to
as “electroacoustics”.[1] Each classical electrokinetic phenomenon at DC or low AC conditions has
electroacoustic analogue. These electroacoustic phenomena have been widely used to determine
electrophoretic mobility of various concentrated particulates without sample dilution. The purpose of
this part of ISO 13099 in methods for Zeta potential determination is description of general features
of such electroacoustic methods that should be common for all instrumental implementation for
measuring electrophoretic mobility using electroacoustics and following calculation of zeta potential

of particulates

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