These documents describe the benefits of obtaining electroacoustics data with different materials, in different industrial processes, and in solving various problems relating to colloids.

Using the ZetaProbe to control particle agglomeration (PDF 59Kb)

Some processes require flocculated suspensions while others require the particles to be well dispersed. In this article we show how the ZetaProbe can be used for controlling the state of aggregation of a colloid.

Determining the Isoelectric point (PDF 105Kb)

The isoelectric point (iep) is one of the most important characteristics of a colloid. The ZetaProbe is the ideal instrument for determining the iep because it is fast, accurate, and there is no need to make a separate background measurement.

Monitoring the Effect of Dispersing Agents (PDF 59Kb)

In this note we show how the AcoustoSizer and ZetaProbe can be used for determining the optimum amount of dispersant to add to a colloid.

Studying Titania Coatings (PDF 52Kb)

Describes the use of the ZetaProbe and AcoustoSizer in monitoring the type and quality of the surface coating on titania particles.

Measuring Particle Size and Stability of Emulsions (PDF 1009Kb)

The ZetaProbe and AcoustoSizer II allow the direct measurement of particle size and zeta potential without the need for sample dilution. In this document we present two applications of this technology.

Electroacoustic Behavior of Calcium Carbonate (PDF 44Kb)

The optical devices for measuring particle size and zeta only work on very dilute samples. The dilution takes time and it must be carried out very carefully to avoid changing the zeta potential. But for some colloids even the most careful dilution will alter zeta. Here we present measurements on one such colloid.

Non-dilute Systems (PDF 59Kb)

One of the principal advantages of the electroacoustic and attenuation methods we use is their ability to provide direct characterization of concentrated colloidal dispersions, without the need for dilution. This note discusses the value of such measurements compared to the alternative techniques that require the sample to be extensively diluted.