Titration of concentrated dispersions using electroacoustic zeta-potentialprobe

Electroacoustic measurement with a zeta -potential probe offers a quick and accurate determination of the optimal dispersant dose required for prevent ing aggregation. The most important advantage of this method is its applica bility to concentrated dispersions which eliminates dilution. Traditional m ethods based on the dilution protocol are often inadequate because dilution affects the g-potential value. It is shown experimentally how this method works on the example of various kaolin slurries at 40 wt %. In combination with acoustic spectroscopy, this method yields a complete and consistent ch aracterization of the aggregation stability.