The instrument that is used for Zeta potential analyses through the streaming potential technique is an Anton Paar SurPASS 3 Electrokinetic Analyzer. The SurPASS 3 employs the classic streaming potential and streaming current method to directly analyze the surface zeta potential of solid materials. The surface Zeta potential is related to the surface charge at a solid/liquid interface and is a key parameter for understanding surface properties and developing new specialized materials. Understanding the surface Zeta potential is vital to study the charge and adsorption behavior of solid surfaces. Automatic pH scans, isoelectric point determinations, and time-dependent recording of adsorption kinetics allow for a deep understanding of the surface chemistry, allowing investigators to confirm or identify the surface chemistry of their materials.

Typical Experimental Results

Streaming potential results for the paintbrush fibers (red), nitrocellulose membrane (blue), and garnet particles (green).
A demonstration of paintbrush fibers resistance to bleaching; Yellow line: Untreated paintbrush fibers; Blue line: Paintbrush fibers treated with bleach. The isoelectric point is minimally affected, providing a good indication that the fibers are bleach-resistant.

Applications

Automobile IndustryBinding Kinetics Catheters
CoatingsFoilsFormulations Testing
FibersGeological Isoelectric Point
Laminate Polymers Medical Devices Membranes
Metal OxidesMetal PowdersOil and Gas
ParticlespH ScanningPharmaceuticals
PlasticsPolymersPolymer Blends
PowdersSurface Charge Surface Conductivity
Surface Zeta Potential Surfactants Thin Films

For more information, please see our application notes.

Instrument: Anton Paar Electrokinetic Analyzer

Key Specifications

Streaming Potential Range± 2000 mV
Streaming Current Range± 2 mA
Cell Resistance5 Ω – 20 MΩ
Pressure Measurement 3500 mbar
pH ValuepH 2 -12
Conductivity0.1 – 1000 mS/m
Sample Size: Planar Solids20 mm x 10 mm
Sample Size: Powders and Fibers>25 µm
Sample Size: Disks14-15 mm
Sample Size: Flexible Tubing6 mm OD
10 cm length
Temperature20