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Each standard is supplied with
a Certificate of Calibration and Traceability,
a description of the calibration method, a table
of its chemical and physical properties and a
Materials Safety Data Sheet (MSDS) with handling
and disposal instructions.
3000
Series Nanosphere Size Standards 20 – 900nm
Uniform polystyrene microspheres in a range of
different mean sizes, each packaged as an aqueous
suspension in 15mL dropper-tipped bottles. The
concentration is optimised for ease of dispersion
and colloidal stability. The microspheres have
a density of 1.05 g/cm3 and refractive
index (589nm) of 1.59.
Nanosphere Size Standards are used for a wide
variety of applications including calibration
in electron microscopy, laser light scattering
and colloid research.
4000
Series Polymer Microsphere Size Standards 1 –1000µm
With the same composition and physical properties
as the 3000 Series, these polystyrene microsphere
standards are supplied as aqueous suspensions
in 15mL dropper-tipped bottles (1 – 160µm)
or in dry form in 1g screw capped bottles (200µm
and larger).
To
download a brochure in Adobe Acrobat
format giving full details of the 3000 and 4000
Series Standards, including individual sizes available,
click here.
NEW
- ChromoSphere-T Coloured
Certified Size Standards
ChromoSphere-T
polymer microspheres are internally dyed with
deeply coloured red or black dyes giving them
very high contrast and visibility against most
backgrounds. They are supplied as dry powders
easily suspendable in liquid media and come in
seven different mean diameters from 50 to 500µm.
(A
similar range of ChromoSpheres is also available
uncertified for general
purpose use.)
To
download a brochure in Adobe Acrobat
format giving full details of ChromoSphere-T Size
Standards, including individual sizes available,
click here.
8000
Series Silica Microspheres 0.5 – 1.6µm
Designed for applications requiring monodisperse
inorganic microspheres, these particles have a
higher density than polystyrene and provide more
contrast than polymer microspheres in optical
and electron beams. They are packaged as aqueous
suspensions at 2% solids in dropper tipped bottles.
The silica spheres have a density of 1.8 –
2.2 g/cm3 and an index of refraction
of 1.40 – 1.46 at 589nm.
To
download a brochure in Adobe Acrobat
format giving full details of the 8000 Series
Silica Size Standards, including individual sizes
available, click
here.
9000
Series Glass Particle Size Standards 2 –2000µm
This range consists of borosilicate glass microspheres
(certified mean diameters from 2 to 20µm)
and soda lime glass microspheres (30 to 2000µm)
all with narrow size distribution and NIST traceable
mean diameters. They are packaged in 1g quantities
of dry microspheres having a density of 2.50 –
2.55 g/cm3 and refractive index of
1.56 at 589nm.
The
soda lime glass of the larger microspheres contains
trace amounts of metallic elements making them
easily detectable by non-dispersive x-ray methods
and improving their contrast and reflectivity
in optical, ultrasonic and electron beams. Soda
lime microspheres have a density of 2.4 –
2.5 g/cm3 and index of refraction of
1.51 at 589nm. Their softening temperature is
7200C and the dielectric constant is
7.3 at 1KHz and 200C.
To
download a brochure in Adobe Acrobat
format giving full details of the 9000 Series
Glass Microsphere Size Standards, including individual
sizes available, click
here.
2000
Series Uniform Polymer Microspheres 5 – 40µm
First introduced in 1971, this range of certified
microsphere size standards continue to find application
where moderate uniformity of particle size is
required rather than the very narrow distributions
(CV <5%) of the other standards. They are widely
used with laser diffraction and light blockage
instruments, acoustical imaging, electrolyte displacement
(e.g. Coulter principle) and other methods often
used to characterise coarse distributions.
Like
the 3000 and 4000 Series microspheres, they are
composed of polystyrene making them durable and
chemically stable. Their density is 1.05 g/cm3
and refractive index 1.59 at 589nm. They are packaged
in 15mL dropper tipped vials and supplied with
certificate of NIST traceable mean diameter.
To
download a brochure in Adobe Acrobat
format giving full details of the 2000 Series
Uniform Polymer Microspheres range, including
individual sizes available, click
here.
Additional certified particle size standards
are described in the section on Standards
for Particle Counting Methods.
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