Electrokinetic analyzer for solid surface analysis SurPASS 3

The zeta potential describes the surface charge and the interaction of charges on the surface with charged species in the aqueous phase. It is affected by functional groups, their dissociation on the surface and adsorbed ions.  It is dependent on the surface properties as well as on the composition of the aqueous solution (e.g. pH, ion concentration). In order to determine the zeta potential the instrument measures the streaming potential or streaming current which arises from the motion of the liquid relative to the surface.

Determination of:
Zeta potential
Surface characterization
Isoelectric point
Adsorption on surfaces

Solid and flat samples with size of min. 2x1cm
Particles > 100 µm

Various sample holders for flat samples, fibers and powders with different sizes and filling contents

Acknowledgement guidelines

In publications, use of the Somapp Lab facilities might be acknowledged as follows:

'The authors would like to acknowledge use of the Somapp Lab, a core facility supported by the Austrian Federal Ministry of Education, Science and Research, the Graz University of Technology, the University of Graz and Anton Paar GmbH.’