Molecular and colloid chemical characterization

Particle electrophorese (PE)

Analyte

  • Charged polyelectrolytes, colloids and nanoparticles
  • Electrophoretic mobility (Zeta potential)
  • Size range: 0.1 nm – 3 µm
  • Concentration range: 0.001 – 40 %

 

Equipment

  • Delsa Nano +C (Beckman Coulter)
  • Delsa Nano Version 2.31

 

Evaluation methods and targets

  • Electrophoretic light scattering
  • Determination of electrophoretic mobility and calculation of zeta potential by Smoluchowski or Huckel method

 

Application examples

  • Determination of zeta potential of symplexes between cationic starch
  • Determination of zeta potential of polyelectrolytes in dependency on pH and electrolyte content of the solution
  • Evaluation of the stability of dispersions and emulsions

 

Measuring principle

  • Determination of the zeta potential of symplexes between cationic starch and anionic polyelectrolytes (→ PDF)

 

Comparative and additional methods

  • Polyelectrolyte titration