MAS Zeta-APS
Particle Size
As sound travels through a slurry or colloid, it becomes attenuated. The
attenuation level is affected by the particle size. The Zeta-APS measures very
accurately acoustic attenuation over the 1-100 MHz frequency range. Because
sound travels through most media, Zeta-APS acoustic attenuation measurements
can be made on high-concentration and/or opaque samples. Particle settling is
not a problem since samples can be stirred or pumped during the measurement.
Zeta-APS sample analysis is quick and easy without requiring particle dilution
which is time consuming, error prone, and may alter the actual sample PSD.
Simply pour, or pump if so desired, your sample in the Zeta-APS sample cell and
the Zeta-APS' intuitive software does the rest in less than 10 minutes.
The Zeta-APS uses software developed and patented to calculate detailed PSD
data without the need for assumptions regarding the PSD shape. Typically,
ensemble-type instruments require that either the software or the operator assume
or guess whether the PSD is unimodal, bimodal, lognormal or Gaussian. Such
assumptions render the data unreliable.
The Zeta-APS' innovative patented hardware design simplifies operation while
minimizing maintenance. This platform is thus suitable for R&D, as well as, repetitive
QC measurements. The Zeta-APS is also ideal for process online operation.
Zeta Potential
The Zeta-APS measures Zeta potential by the Electrokinetic Sonic Amplitude (ESA)
Electro-acoustic method invented and patented by Matec Applied Sciences.
ESA, which does not need to use optical/laser means, consists of applying a high-
frequency electric field to the sample and measuring the resulting sound wave
amplitude and phase angle.
The ESA measurement is being used worldwide, in both academic and industrial
institutions, for the measurement of a wide variety of opaque, translucent,
aqueous, and non-aqueous samples without the need to perform sample dilution.
ESA applications include QC/Plant/R&D automated Iso-Electric Point (IEP)
determination (used in conjunction with the ESA automatic titrator),
surfactant/dispersant/flocculant effect studies, surface modifications, core-shell
systems, and many others
