The electrokinetic potential measurements of biocolloids particles

There the ways of measurements of an electrokinetic potential (zeta-potential) of colloid particles and, in particular, a problem assotiated with use of the classical electrophoresis are briefly discussed in the article. The methods and devices based on measurements of a light scattering of particles and became a frequent practice now are analyzed most extensively. It is shown that the Doppler spectroscopy of the light scattered by particles is accompanied by difficulties not only by the analyse of particle sizes, in particular, for polydisperse colloids, but also, first of all, while measuring the zeta-potential because it is defined not so much by the size, as totality of peripheral parameters of the particles. The way of measurement near to a classical electrophoresis is offered, where the sign-variable electric field is used, the drift length of the particles and a difference of electric potentials are minimized.