Project Description

size standard particles

EPRUI Biotech supplies three different matrixes of particle size standards: Polystyrene, PMMA and Silica.

The particle size ranges from 100nm to 50um. EPRUI Biotech supplies a full range of size standard microspheres based on patented particle technology. All of our particles standards are determined by Coulter Counter, DPS Disk Centrifuge, Dynamic Light Scattering, TEM, SEM, and Optical Microscope against Standard Reference Materials (SRMs) from the National Institute of Standards and Technology, U.S. Department of Commerce (NIST).  The particle sizes of these microspheres are therefore traceable to globally recognized primary standards of NIST SRMs.

All particle size standards supplied from EPRUI are either cross-linked polymer or silica microspheres.  The polymer particle size standards >1um in diameter are based on highly crosslinked polystyrene or poly(methyl methacrylate) for improved physical and chemical stability.

  1. Broad size range available from nanometer to micron
  2. Diverse matrix selection from polymers to silica
  3.  Perfect spherical morphology
  4. Narrow particle size distribution
  5. Stable physical and chemical properties

Item Polystyrene PMMA Silica
Size range 100nm-50um 100nm-50um 100nm-50um
C.V. <3% <3% <3%
Density

Noncrosslinked:1.05g/cm3

crosslinked:1.08g/cm3

1.18g/cm3 2.20g/cm3
Refractive Index 1.59 1.49 1.45
Storage

Room temperature or store in the refrigerator above 0℃。

Keep the cap closed and prevent from pollution

Shelf Life 12 months 12 months 12 months

  1. Nano Standard Particle Size
Item Particle Size Matrix
EPRUI-N-PS60 60nm Polystyrene
EPRUI-N-PS90 90nm Polystyrene
EPRUI-N-PS160 160nm Polystyrene
EPRUI-N-PS190 190nm Polystyrene
EPRUI-N-PS225 225nm Polystyrene
EPRUI-N-PS240 240nm Polystyrene
EPRUI-N-PS260 260nm Polystyrene
EPRUI-N-PS360 360nm Polystyrene
EPRUI-N-PS455 455nm Polystyrene
EPRUI-N-PS530 530nm Polystyrene
EPRUI-N-PS710 710nm Polystyrene
EPRUI-N-PS800 800nm Polystyrene
EPRUI-N-PS950 950nm Polystyrene
EPRUI-N-Si300 300nm SiO2
EPRUI-N-Si500 500nm SiO2

2. Micro Particles Standards

Item Particle Size Matrix
EPRUI-M-PS001 1um PS/DVB
EPRUI-M-PS002 2um PS/DVB
EPRUI-M-PS003 3um PS/DVB
EPRUI-M-PS004 4um PS/DVB
EPRUI-M-PS005 5um PS/DVB
EPRUI-M-PS006 6um PS/DVB
EPRUI-M-PS007 7um PS/DVB
EPRUI-M-PS008 8um PS/DVB
EPRUI-M-PS009 9um PS/DVB
EPRUI-M-PS010 10um PS/DVB
EPRUI-M-PS015 15um PS/DVB
EPRUI-M-PS020 20um PS/DVB
EPRUI-M-PS030 30um PS/DVB
EPRUI-M-PS040 40um PS/DVB
EPRUI-M-PS050 50um PS/DVB
EPRUI-M-PM001 1um PMMA
EPRUI-M-PM002 2um PMMA
EPRUI-M-PM003 3um PMMA
EPRUI-M-PM004 4um PMMA
EPRUI-M-PM005 5um PMMA
EPRUI-M-PM006 6um PMMA
EPRUI-M-PM007 7um PMMA
EPRUI-M-PM008 8um PMMA
EPRUI-M-PM009 9um PMMA
EPRUI-M-PM010 10um PMMA
EPRUI-M-PM015 15um PMMA
EPRUI-M-PM020 20um PMMA
EPRUI-M-PM030 30um PMMA
EPRUI-M-PM040 40um PMMA
EPRUI-M-PM050 50um PMMA
EPRUI-M-Si001 1um SiO2
EPRUI-M-Si002 2um SiO2
EPRUI-M-Si003 3um SiO2
EPRUI-M-Si004 4um SiO2
EPRUI-M-Si005 5um SiO2
EPRUI-M-Si006 6um SiO2
EPRUI-M-Si007 7um SiO2
EPRUI-M-Si008 8um SiO2
EPRUI-M-Si009 9um SiO2
EPRUI-M-Si010 10um SiO2
EPRUI-M-Si015 15um SiO2
EPRUI-M-Si020 20um SiO2
EPRUI-M-Si030 30um SiO2
EPRUI-M-Si040 40um SiO2
EPRUI-M-Si050 50um SiO2