Certain features of will be down for maintenance the evening of Friday August 18th starting at 8:00 pm CDT until Saturday August 19th at 12:01 pm CDT.   Please note that you still have telephone and email access to our local offices. We apologize for any inconvenience.


Microparticle Quality Assurance

Our polymer particles undergo rigorous quality control to measure particle size, particle size distribution, surface charge and surface charge density, surface chemical composition, porosities, and others. For characterization of the particles, the following techniques are used:

  • transmission electron microscopy
  • scanning electron microscopy
  • optical microscopy
  • photon correlation spectroscopy (PCS, CoulterTM N4 Plus Submicron Particle Sizer)
  • CoulterTM Counter (Multisizer II)
  • conductometry
  • potentiometry
  • Zeta-potential measurements