Electrophoretic light scattering.

Under a microscope, electrophoretic mobilities of visible particles can be determined in a free solution without any boundary or zonal separation. Electrophoretic light scattering based on the Doppler velocimetry can be taken as a nanometer-scale version of the above traditional electrophoresis. An electrophoretic light scattering apparatus was developed to enable mobility determination of proteins and surfactant micelles which have been outside the range of the electrophoresis.