Particle Sizing

Particle Size Analysis of Materials for Industry and Research

Particle size analysis of materials can be performed between 40 nm to 2000 microns (using laser diffraction on liquid samples) and 1 nm to, say, some microns (system dependent) using PCCS (photon cross correlation spectroscopy). Image analysis can be performed on images from TEM or SEM or Optical microscopes.

Methods

• Disc Centrifuge - High resolution particle size distribution of nano and sub-micron particles.
• Enhanced Laser Diffraction - Coulter LS230. Optical modelling allows full Mie theory implementation
• PCCS (photon cross correlation spectroscopy) is performed using a Sympatec 'NanoPhox' instrument - useful for nano-dispersions
• Image analysis - the size of particles analysed is dependent on the magnification of the microscope or lens used.

Applications of Particle Sizing

• A knowledge of the particle size distribution can help assess the processability of materials.
• Attrition/coagulation or other processes can be followed to ensure that products are within specification.
• Analysis gives confidence to results of trials aimed at monitoring process changes
• Allows product specifications to be assigned to achieve correct technical performance
• Laser diffraction is a UKAS-accredited technique.  Membership of Proficiency Testing Schemes means our customers can have confidence in the results generated

The MSG advantage

• Bubbles and emulsions may be sized unlike other methods
• In Laser Diffraction, modeling enables full distribution data to be obtained including sub-micron particles
• Large numbers of particles are analysed ensuring representative data
• Laser Diffraction is a UKAS-accredited technique
• Theory and possible artifacts are well understood by the laser diffraction method
• Parallel microscopy with image analysis work regularly undertaken to further understand the size data obtained