The new SZ-100
series instruments analyze key particle physical properties including size,
zeta potential, molecular weight, and second virial coefficient (A2). Particle size analysis is performed by dynamic
light scattering (DLS). Zeta potential is measured by electrophoretic light
scattering. Molecular weight and A2 are analyzed by static light scattering
using a Debye plot.
The SZ-100 is the
only instrument available capable of performing size measurements at both 90° and backscatter (173°). This unique feature provides maximum sensitivity
and allows the user to optimize measurement conditions for all possible sample
types. Particle size measurements are performed in a variety of cells at
volumes down to 12 µL. Zeta potential measurements are made in either
disposable cells for aqueous samples or dip cells for organic and biological
samples. The unique disposable cells using carbon electrodes can typically
measure hundreds of samples before requiring replacement.
An automatic
titrator is available for iso-electric point determinations of zeta potential
vs. pH, or studies investigating optimum surfactant concentration for
formulation or processing.
Particle size
measurements can be made from 0.3 nm - 8 µm at concentrations from 0.1 mg/mL
(lysozyme) to 40 wt percent depending on sample properties. Zeta potentials
from -200 to +200 mV can be analyzed manually or with the auto titrator.
Molecular weight of small particles (<100 nm) is measured from 1x10
3
to 2x10
7 g/mol. Typical applications include nanoparticles,
colloids, proteins, biomolecules, and emulsions.
For more information or for demonstration click here
info-sci.fr@horiba.com or
click here to visit our website.
