Abstract
An electrokinetic flow field in a microchannel was investigated by a PIV system using a microscope and sub-micron fluorescent particles. The present study focused on quantitative measurements of electroosmotic flow eliminating velocities of tracer particles induced by electrophoresis, which was calculated by measurement velocity in a cell, comprised of electroosmotic flow and electrophoresis. Quantitative velocity profiles of electroosmotic flow were obtained subtracting velocities of tracer particles induced by electrophoresis from measured velocities. It was observed that velocity profiles of electroosmotic flow had a reverse parabolic shape in the center region of the microchannel and were uniform near the wall.
