Zeta potential

Zeta potential is a scientific term for electrokinetic potential in colloidal dispersions. In the colloidal chemistry literature, it is usually denoted using the Greek letter zeta (ζ), hence ζ-potential. From a theoretical viewpoint, the zeta potential is the electric potential in the interfacial double layer (DL) at the location of the slipping . This potential, which is measured in MilliVolts, may arise by any of several mechanisms. Among these are the dissociation of ionogenic groups in the particle surface and the differential adsorption of solution ions into the . Its measurement brings detailed insight into the causes of dispersion, aggregation or flocculation, and can be applied to improve the formulation .

It depends on the properties of liquid as well as on properties of the surface. Electrostatic repulsion between particles depends on the value of zeta potential. The zeta potential (ζ-potential) is the potential difference across phase boundaries between solids and liquids.

Since zeta potential is not equal to the electric surface potential in a double layer or to the Stern potential, it is . Definition of zeta potential and application in filters. In other words, zeta potential is the . Measurement techniques are based on indirect readings obtained during electrokinetic experiments. Typically, the magnitude of the zeta potential varies between .

It is concept of Zeta Potential in Suspension and Emulsion for stability purpose. Large zeta potentials predict a more stable dispersion. Fast and accurate measurement of the zeta potential with the SZ-1can enhance understanding of aggregation and flocculation in samples and speed up the process of . This video explains zeta potential in suspension formulation. Learn about Zeta Potential in this excerpt from the Coagulation and Flocculation lecture found in our Water.

It can be used to optimize the formulations of suspensions and emulsions. Knowledge of the zeta potential can reduce the time needed to produce trial formulations. Colloidal particles dispersed in a solution are electrically charged due to their ionic characteristics and dipolar attributes.

Each particle dispersed in a solution is surrounded by oppositely charged ions called the fixed layer. Outside the fixed layer, there are varying compositions of ions of opposite polarities, forming a . Particles within a colloidal dispersion carry charges that contribute to the net charge of a particle. Each particle is surrounded by oppositely charged ions in what is called a fixed or stern layer.

Beyond the fixed layer there are both positive and negative. TRPS is the only available technology that provides detailed particle size and zeta potential measurement. Measurement is done a particle-by-particle basis, guaranteeing accuracy and certainty, particularly for polydisperse samples. Size vs zeta potential plots are provided and required for proper analysis.

In addition to existing zeta potential and particle size measurement, molecular weight analysis function is newly added.

Electro-osmosis measurement enables high precision analysis of zeta potential using micro-volume (130ul) disposable cell.