Expanded Line of NIST-traceable Particle Size Standards
With the beginning of 2006, microParticles GmbH offers its customers a considerably expanded line of NIST-traceable nanoscale particle size standards. Designed especially for quality assurance and calibration purposes in a variety of particle sizing instruments, the nanometer size standards possess the following features:
- Polymer matrix polystyrene (density: 1.05 g/cc; refractive index: 1.59).
- Extremely narrow size distribution (C.V.
- High colloidal stability in aqueous dispersions.
The newly available 15 size standards within the diameter range from 100 nm through 1000 nm have been characterized by a high resolution CPS disc centrifuge (DC-24000), photon correlation spectroscopy (PCS), and scanning electron microscopy (SEM). All particle size standards come as 2 % aqueous suspensions in 10 or 15 ml dropper-tipped bottles together with a Certificate of Analysis containing also selected physical data and a graph of the size distribution, and an appropriate Material Safety Data Sheet. Of course our mirometer sized standards remain available to our customers as before.