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Wallis

Wallis

Wallis – Zeta Potential Analyser

WallisTM is an innovative high resolution Zeta potential analyser purely dedicated to nanoparticle and colloidal charge characterisation. Based on a modern version of Laser Doppler Electrophoresis (LDE) technique. Ideal tool for studying colloidal suspension’s stability and nanoparticles’ electrophoretic properties.

Key benefits No electro-osmosis ? Artifact-free measurements Improved LDE technology ? Efficient, reliable & simple High-resolution measurement ? Accurate & repeatable Zeta potential analysis High durability electrodes ? robustness & cost-effectiveness Designed for standard disposable and quartz cuvette ? Easy-to-fill, compatible with organic solvents and high-pH suspensions Advanced software functionalities (Time, pH, Temperature kinetic modes, SOPs, reporteditor, etc.) Easy-to-use and intuitive Graphical User Interface (GUI) software

Technologies & Innovations Dip cell : simple, robust, artifact-free Simple and easy sample preparation ; no risk of bubble Robust : high durability vitreous carbon electrodes Artifact-free : optimized dip cell electrodes design ? no electro-osmosis bias High resolution measurements : sampling frequency 30 times higher than competitors / significantly improving measurement resolution down to 0,1 mV

Main Characteristics Zeta potential measurement range: -200mV to +200 mV High resolution measurement: better than 0.1 mV Dip cell with unique high durability amorphous carbon electrodes ZetaQ proprietary software (lien vers onglet ZetaQ) Compliant with ISO 13099-2 Colloidal system – methods for Zeta potential determination – Part 2

Zeta potential (?) Is a fundamental property of colloidal suspension related to the effective surface electrical charges of particles immersed in a solvent.

? measurement is very important because it gives an indication on formulation stability and electrophoretic properties of NPs. Zeta potential is measured by the well-known technique of Laser Doppler Electrophoresis

Wallis - Meritics - Zeta Potential Laser Doppler Electrophoresis principle: An alternative electrical field/voltage is applied between two electrodes immersed deeply in the colloidal suspension; the charged particles are forced into a translation motion (electrophoresis) with a speed (?) proportional to the applied electrical field. The electrophoretic mobility is defined by the ratio between the particle speed and the applied field amplitude.

For more information on  Wallis  talk to  Meritics Ltd

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