CERTIFIED PARTICLE SIZE STANDARDS

SEM image of MF- particles
SEM image of MF- particles

 

Size distribution curves of three different calibration standard particles measured on the COULTER COUNTER
Size distribution curves of three different calibration standard particles measured on the COULTERTM; MULTISIZER II 		In the range of 100 nm - 250 µm our calibration standard grade polystyrene or melamine resin particles are among the best characterized particles standards currently available. The accurate diameter of these particles is determined by methods described by the National Institute of Standards and Technology (NIST, USA), like:
  • Transmission electron microscopy
  • Scanning electron microscopy
  • Differential Sedimentation (high resolution CPS disc centrifuge DC 24000)
  • Optical microscopy
  • COULTERTM MULTISIZER 3 particle size analyzer with HDF system
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The measuring instruments are calibrated using standards obtained from the Community Bureau of Reference (BCR, Belgium: Standards RM 165, 166 or 167) and from the NIST (SRM 1690, 1691 or 1692), allowing traceability of our particle standards to internationally recognized ones.
The excellent quality of the particles supplied by microparticles GmbH is demonstrated by the figures shown on the left.

The certificate of analysis of each batch includes particle diameter and standard deviation as well as some physical data (i. e. solids content, particle number per ml, specific weight, refractive index).

Certified calibration standard particles (-ST-):
(Click "Table"-buttons to view the complete particle spectrum or enter your desired particle diameter in µm)

  • MF-ST in the size range 1-10 µm
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  • PS-ST in the size range 100 nm-1 µm
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  • PS-ST in the size range 1-250 µm
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    Pack size:

  • aqueous dispersions (20 mg/ml): 10 ml, 15 ml
  • powder (100 µm and larger): 1 g
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    -> Ask for other particle diameters and pack sizes or for specifically adjusted polymer densities.

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