Developing of Standard Reference Materials of the Electrokinetic (Zeta) Potential of Nanoparticles

Resumo

The experimental results on the development of standard reference materials of the electrokinetic (Zeta) potential of nanoparticles based on silicon dioxide are presented. Standard reference materials are used for the metrological assurance of the Zeta potential measurements by the method of electrophoretic light scattering. The certified characteristics of the standard reference materials are the value of the Zeta potential and its extended uncertainty. The reference characteristic of standard reference materials is the distribution of the value of electrokinetic (Zeta) potential. The method of synthesizing silicon dioxide nanoparticles with a stable for a long time value of the Zeta potential is described. The possibility of creating standard reference materials on the basis of such particles with combined reproducibility of the geometrical and electrokinetic parameters of nanoparticles is considered.