Anton Paar SurPASS 3 surface charge analysis system

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Anton Paar has launched the SurPASS 3 surface charge analysis system. The product determines the zeta potential at the surface of a macroscopic solid in contact with an aqueous solution. The compact instrument design, with plug-in sample holders, gives easy access to material surface charge.

The laboratory space occupied by the unit is said to be significantly reduced in comparison to previous streaming potential analysers. The instrument does not contain any moving parts, unnecessary tubing or cables, which may be subject to measuring artefacts. It is a real plug-and-measure instrument: simply plug in the measuring cell and hit the start button.

The device gives access to zeta potential data in less than 3 min. The high time resolution for data acquisition and the sensitive measurement of streaming potential improve the reproducibility of zeta potential, even in the range below 3 mV.

The operating software offers the selection of single zeta potential data, the analysis of the surface isoelectric point or a full pH scan. The operation modes are complemented by the investigation of solute effects on the solid surface to characterise adsorption and desorption processes.

Independent of sample geometry, size and origin, the system determines reproducible zeta potential values. Elaborate measuring cells for individual sample materials offer the user flexibility for quality control. The measuring cell in use is automatically detected by the software.

The lean structure of the operating software helps the user to focus on the analysis of the surface zeta potential of their sample. The software remains intuitive, even if the user does not care about the physical background of the surface zeta potential. Together with the product’s enhanced measuring principle, the software facilitates a fast route to the zeta potential of macroscopic solids.