ZETA POTENTIAL MEASUREMENTS OF IRREGULAR SHAPE SOLID MATERIALS

An instrument is described to measure the electrokinetic potential of solid bodies whose size and/or shape precludes determination by either conventional electrophoresis, or electroacoustic, techniques. Based on the established principles of streaming potential/current, and using specially designed measuring cells, the zeta potential of fibres and films is calculated from two simple methods. Examples of measurements are presented to demonstrate the straightforward use of the instrument for the investigation of industrially important applications.