Member since: 2018
Organization: The George Washington Univeristy
Makes titration experiments easy and automated. Could be more robust.
Application Area: Characterizing colloidal suspensions as a function of pH
"The tool works well for aqueous samples but will not work for other, higher viscosity liquids. It would be really nice to be able to perform titration experiments with liquids like ethylene glycol. Given the limited power of the pump, the system is very sensitive to creases in the tubing."
The MPT-2 is an accessory for the Zetasizer Nano that provides extensive automation for a number of measurements that are routinely required when characterizing the size and zeta potential of dispersed particles and molecules.
Both the size and zeta potential can be measured in sequence as part of the automated titration.
pH is one of the main influences of the zeta potential of materials, so measuring zeta potential as a function of pH, and the determination of the isoelectric point are often required. Automating this improves productivity by proving a complete measurement using a stored method.
Conductivity is also measured, and automation can speed up the determination of whether ions in a formulation are specifically or non-specifically bound.
The same automation can be extended to study the effect of the concentration of additives such as surfactants and polyelectrolytes, and there is a dilution function to study the effect of dilution on the size and zeta potential of the sample.