Dynamic light scattering (DLS), sometimes referred to as Quasi Elastic Light Scattering (QELS), is a non-invasive, well-established technique for measuring the size and size distribution of molecules and particles typically in the submicron region, and with the latest technology, lower than 1nm.

Typical applications of dynamic light scattering are the characterization of particles, emulsions or molecules which have been dispersed or dissolved in a liquid. The Brownian motion of particles or molecules in suspension causes laser light to be scattered at different intensities. Analysis of these intensity fluctuations yields the velocity of the Brownian motion and hence the particle size using the Stokes-Einstein relationship.


Dynamic Light Scattering technology from Malvern Panalytical offers the following advantages:

  • Accurate, reliable and repeatable particle size analysis in one or two minutes.
  • Multi-Angle Dynamic Light Scattering (MADLS®) improves the resolution of DLS and provides angular independent size results.
  • Simple, material independent measurement of per peak particle concentration.
  • Mean size only requires knowledge of the viscosity of the liquid.
  • Simple or no sample preparation, high concentration, turbid samples can be measured directly using NIBS.
  • Size measurement of sizes from <1nm to >10um
  • Size measurement of molecules from MW < 1000Da.
  • Low volume requirement (as little as 3µL).
  • At-line process systems available for control of nanoparticle manufacture.
  • Compliance with regulatory standards ISO 13321, ISO 22412, 21 CFR Part 11. 

Zetasizer range

Zetasizer range

The world’s most widely-used systems for nanoparticle, colloid and biomolecular particle sizing and particle charge measurements

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Measurement Molecular size, Molecular weight, Particle size, Zeta potential
Temperature range 0°C - 120°C
Particle size range 0.3nm - 10µm
Technology Light Scattering, Dynamic Light Scattering, Electrophoretic Light Scattering, Static Light Scattering
Dispersion type Wet
Sample cell type Cuvette
Molecular measurement type Chromotography, Batch measurement

Zetasizer range

Zetasizer range

The world’s most widely-used systems for nanoparticle, colloid and biomolecular particle sizing and particle charge measurements

More details
Measurement Molecular size, Molecular weight, Particle size, Zeta potential
Temperature range 0°C - 120°C
Particle size range 0.3nm - 10µm
Technology Light Scattering, Dynamic Light Scattering, Electrophoretic Light Scattering, Static Light Scattering
Dispersion type Wet
Sample cell type Cuvette
Molecular measurement type Chromotography, Batch measurement

Zetasizer Advance Range

Zetasizer AT

Zetasizer Advance Range Zetasizer AT

Light Scattering for every application

On-line particle size analyzer for nano-scale processes

More details More details
Technology
Dynamic Light Scattering
Electrophoretic Light Scattering
Static Light Scattering
Measurement type
Particle size
Zeta potential
Molecular weight
Particle size range 0.3nm - 10µm