A method and device for determining the charge zero point of electrically charged colloidal and / or suspended particles

摘要

A method for determining the charge zero point of electrically charged colloidal and / or suspended particles in a fluid, and for determining a until the attainment of the charge zero point required amount of neutralizing agent, comprising:(a) adding a charge to the fluid by means of neutralizing;(b) applying an electrostatic field on the particles in the fluid;(c) determining the local time change in density of the particles of the fluid located within the electrostatic field;(d) receiving the course of the local time change of density as a function of the added amount of neutralizing agent into the region in which the local variation over time of the change in density approaches the value zero; and(e) extrapolating the characteristic of the local time change of density to the value zero and determined by the up to complete neutralization of the particles can be added to the amount of neutralizing agent.