Laser Doppler micro-electrophoresis is used to measure zeta potential by applying an electric field to the solution causing the particles to move in suspension. The velocity of the particles is measured and the electrophoretic mobility is calculated. From this value the zeta potential is determined.For Molecular Weight – Static Light ScatteringStatic light scattering is used to determine the molecular weight of proteins and polymers using several solutions at different concentrations.(Figure right: Figure 3: Schematic of charged nanoparticle. It arises from the surface charge and the concentration and types of ions in the solution.)See Malvern ZetaSizer Nano Series Manual ApplicationsProteins, Polymers, Micelles, Carbohydrates, Nanoparticles, Colloidal dispersions, Emulsions Sample Requirements The charge acquired by a particle or molecule in a medium is called the zeta potential.
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