SPI Supplies Brand Uniform Polystyrene DVB Microspheres, 20 µm, 15 ml Dropped Tipped Vial
Uniform Polystyrene DVB Microspheres in Suspension
Styrene and divinylbenzene monomers polymerized in aqueous solution to form uniform spherical latex microspheres. Products are packaged ad aqueous suspensions in 15 ml vials. These spheres are known for their stability in the electron beam, are very durable, are nonionic and also, chemically inert. Polymer density 1.05g/ml; RI 1.59 @ 540nm. Use with confidence for all forms of microscope instrument calibration. Products are all NIST traceable.
- Diameter Nominal µm: 20
- Diameter Median µm: 19.9
- Standard Deviation µm: 1.4
- Standard Deviation %: (7.6)
- Number/Pkg: 3.0 x 107
The number of particles per unit of measure given on the website is all of the available information. These particles are sold as reference materials for size, not particle count, and the number of particles per unit of measure in a particular batch or lot number is not controlled or measured.