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Electrophoretic Light Scattering (ELS) is a technique used to measure the electrophoretic mobility of particles in dispersion, or molecules in solution. This mobility is often converted to Zeta potential to enable comparison of materials under different experimental conditions.
The fundamental physical principle is that of electrophoresis. A dispersion is introduced into a cell containing two electrodes. An electrical field is applied to the electrodes, and particles or molecules that have a net charge, or more strictly a net zeta potential will migrate towards the oppositely charged electrode with a velocity, known as the mobility, that is related to their zeta potential.
Malvern Instruments offer leading instrumentation for the measurement of electrophoretic mobility. The Zetasizer Nano provides a simple, fast and accurate way to measure zeta potential, and uses a unique disposable capillary cell to ensure that there is no cross contamination between samples. The NanoSight NS500 measures electrostatic potential particle-by-particle to produce number-weighted, not intensity-weighted, data, avoiding any bias towards larger particles.
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This presentation discusses the importance of particle size, zeta potential and rheology for a functional suspension, and demonstrates how these properties can be manipulated to induce dispersion stability.
Zeta potential or particle charge is the driving force responsible for the stability and flocculation of particles in a water treatment plant. Neutralization of this charge by oppositely charged coagulants is key for formation of stable, easily filte...
We demonstrate the surface zeta potential measurement of pig skin, a human skin analogue used in medicine, pharmaceutical and cosmetic development and cellulose filter paper, used primarily for sterile filtration
In this work we demonstrate latex measurements up to 4M KCL using the Diffusion Barrier Technique, thereby demonstrating sample-limited, rather than instrument-limited characterization of high conductivity samples.
Why particle size, zeta potential and rheology are important. This poster discusses the importance of particle size, zeta potential and rheology for dispersion stability and how they can be manipulated to enhance stability
(Webinar - Recorded)
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