|
 
| Dip Probe in the
sample like pH probe |
or Place a cup on the top of the
probe and fill with as little as 0.1 ml of the sample
|
Zeta potential
Probe yields information on following parameters:
-
zeta potential
in concentrated dispersions and emulsions (vfr>1%)
-
zeta potential
in porous bodies (Model DT-330 and DT-350)
- electric surface charge density
- iso-electric point
- optimum dose of surfactant
- sedimentation stability of the sample
- presence of small amounts of large sedimenting particles
Advantages over micro-electrophoresis
and ELS:
- no dilution, volume fraction up to 50%
- less sensitive to contamination
- higher precision (± 0.1 mV)
- low charges (down to 0.1 mV)
- electro-osmotic flow is not important
- convection is not important
- accurate for non-aqueous dispersions
|
|
