Zeta Potential in Colloid Science

The zeta potential in colloid science is the overall charge a particle acquires in a specific medium.

  • The magnitude of the zeta potential gives an indication of the potential stability of the colloidal system
  • If all the particles have a large negative or positive zeta potential they will repel each other and there is dispersion stability
  • If the particles have low zeta potential values then there is no force to prevent the particles coming together and there is dispersion instability
  • A dividing line between stable and unstable aqueous dispersion is generally taken at either +30 or -30mV
  • Particles with zeta potentials more positive than +30mV are normally considered stable
  • Particles with zeta potentials more negative than -30mV are normally considered stable

Zeta Potential in Colloid Science | Stability Chart

Click here to return to “An Introduction to Zeta Potential and its Measurement”

colloidal silver back to top