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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 webinar organised by IChemE's Water Special Interest Group introduces the Zetasizer WT to the water treatment community. The Zetasizer WT is a robust and practical on-line measurement system that enables optimized coagulant dosing during the wat...
How can I trust my data? Is it affected in any way by the measurement technology, or by the user through sample preparation or the analysis parameters employed? Independent and orthogonal measurement modalities should be used to provide measurement ...
A detailed understanding of the mechanism of unfolding, aggregation, and associated rheological changes is developed in this study for β-Lactoglobulin at different pH values through concomitant measurements utilizing dynamic light scattering (DLS), o...
The measurement of the zeta potential of non-aqueous suspensions is challenging as the electrophoretic mobility of the particles is very small. Here we describe how the Zetasizer Nano in combination with a universal dip cell accessory gives excellent...
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.
(Webinar - Recorded)
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