10 bottle set.
Available in 5 different weight options.

Background
The Polydisperse Particle Standards were formally known as the BCR 'Mirror' Standards because they mirrored the size ranges of an official set of spherical reference standards that were being developed for the European Community (Community Bureau of Reference - BCR).

The 'Mirror' Standards were made both to assess the performance of the analytical laboratories and to augment a limited supply of the official standards.  Although sub-divided, the BCR samples were never certified, which leaves these new Polydisperse Particle Standards as the most comprehensively analysed set of spherical particle size reference standards available.

• Traceability through NIST, BCR and NPL standards
• Calibration for any method of particle size analysis
• One of the largest international teams ever assembled
• Unambiguous primary methods used - microscopy, sieving, sedimentation and the Coulter method

DISPERSION NOTES:
The standards may contain some agglomerates but, providing they are well dispersed in liquid medium, the resuls will not be affected. The contents of each bottle should be emptied into a small container of capacity 50-100ml and 50ml water added (de-ionised preferably, but not essential). Please the container with sample in an ultrasonic bath for 20 minutes. Alternatively, an ultrasonic probe will give an excellent dispersion in about 10 seconds. There is no evidence of particle breakdown with excessive ultrasonics.

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For more technical information click here