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Archimedes
Sub-micron particle metrology
Archimedes is a new, innovative instrument that uses the technique of resonant mass measurement to
detect and accurately count particles in the size range 50nm - 5µm, and reliably measure their buoyant
mass, dry mass and size. Particularly useful for
the characterization of protein aggregates in
formulation or buffer, Archimedes is also able to
distinguish between proteinaceous material and
contaminants such as silicone oil by means of
comparing their relative resonant frequencies
and buoyant masses as seen in the slide below.
Biolin:
Attension
Tensiometry
Attension is the Biolin Scientific brand of tensiometers for all types
of surface measurements. Tensiometry is the measurement of the
surface tension of liquids, and can be performed optically on a pen-
dant or sessile drop as with bench top Theta tensiometers shown in
the photo or on a force system such as the Sigma series shown on
next page.
All Theta models offer Contact Angle measurements on surfaces to
assess the wetting or wettability; where a
< 90 degrees indicates
good wetting and >90 is poor wet-
ting; also adsorption studies and
techniques from static and dynamic
contact angles to surface / interfacial
tensions, drop volume and surface
free energy.