A Basic Introduction to Electrophoretic Light Scattering (ELS)

Electrophoretic Light Scattering (ELS) is a technique used to measure the electrophoretic mobility of particles or molecules in solution. This measurement is used to determine Zeta potential, which is a measure of the electrostatic or charge repulsion/attraction between particles and is a predictor of emulsion and dispersion stability. Zeta potential is a function of both the particle surface and the dispersant. It provides information that is critical to formulators during the design of multi-component products.

What is the importance of Zeta potential measurements for colloidal dispersions?
How is it determined using ELS?

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