Molecular and colloid chemical characterization

Analyte

• Polymers, colloids and nanoparticles in solutions (aqueous and organic solutions)
• Particle sizes (hydrodynamic radius)
• Size range: 0.1 nm – 3 µm
• Concentration range: 0.001 – 40 %

Equipment

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

Target

• Determination of the diffusion coefficient by dynamic light scattering
• Mathematical determination of particle sizes by cumulate, contin, Marquardt and NNLS methods
• Determination of intensity, volume and number distribution functions

Application

• Determination of the hydrodynamic radius of polymers and polyelectrolytes as dependent on the solvent, electrolyte content and pH value
• Investigation of symplex formation between cationic starch and anionic polyelectrolytes

Measurement method

• Studies on symplex formation between cationic starch and anionic polyelectrolytes (see PDF)

Methods of comparison and supplementation

• Analytical ultracentrifugation
  
• Particle size analysis