Patent ID: 7295311

Claim:
A device for electrophoretic mobility determination using light scattering phase analysis comprising: a laser emitting laser light along a path; a beam splitter positioned along the path to transmit a first portion of the laser light and to reflect a second portion of the laser light; an oscillating mirror positioned to deflect one of the first and second portions of the laser light in response to a drive signal; a cuvette holding a sample disposed to output a composite light wave based on input of at least one of the first and second portions of the laser light, the cuvette having at least two electrodes disposed along sides of the cuvette to create an electric field; a scattered light detector disposed to output a photopulse signal based on input of the composite light wave; and a processor for measuring the electrophoretic mobility of the sample based on a phase shift analysis using cross-correlation of the photopulse signal with the drive signal, and outputting values capable of being stored in a computer memory for display of results based on the electrophoretic mobility measurements.