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Mobility and effects due to surface charge
Mobility and effects due to surface charge
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机译：表面电荷导致的流动性和影响
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摘要
PROBLEM TO BE SOLVED: To remove the effect of an electroosmotic flow in a method for measuring the velocity distribution of particles using a capillary cell.;SOLUTION: In a method and an equipment for automatically calculating the charge related characteristics or the charge induced parameters of particles (78) in a dispersion liquid (76) or on the wall of a cell, a dispersion liquid (76) containing particles is fed into a cell (52) and irradiated with light from a light source and a light scattered from the particles is detected in a detection space. The dispersion liquid (76) is applied with an electric field at a first field direction switching frequency and then applied with an electric field at a second field direction switching frequency. A first value related to the velocity distribution of particles is obtained using a signal detected from the light scattered upon application of the electric field at the first frequency. The velocity distribution of particles is corrected using a second velocity related signal or value derived from the light scattered during application of the electric field at the second frequency. The first frequency is low enough to obtain a resolution allowable for the distribution of particle velocity related value.;COPYRIGHT: (C)2002,JPO
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