Zeta Potential Is Quick And Simple
Meritics offers a range of scientific analysis equipment featuring zeta potential capabilities, allowing quick, easy and accurate measurement of samples.
The Beckman Coulter DelsaNano range is available as just zeta potential or combining both Zeta Potential measurement and particle size measurement. It is the only ELS system available for sample measurement without the need for dilution for most cases.
The patented optical technology allows the zeta potential distribution, not just the average, to be determined on suspended materials and surfaces. And SOP-based software makes routine analysis quick and simple while the optional 3 burette titrator means stability and additive studies are straightforward while potential contamination or carryover is minimised.
By using photon correlation spectroscopy (PCS), particle size is determined by measuring the rate of fluctuations in laser light intensity scattered by particles as they diffuse through a fluid. For size analysis measurements or electrophoretic dynamic light scattering (ELS), the determination of electrophoretic movement of charged particles under an applied electric field from the Doppler shift of scattered light is used for zeta potential determination.
This range has many capabilities and can measure zeta potential of a flat sample or surface.
The first in the industry to measure zeta potential of flat surfaces or samples using ELS, the Delsa Nano seires can measure particles as small as 6 Angstrom and as large a 7 micron, with molecular weight as small as 267 Dalton in a concentration range from 1 ppm to 40%.
The Matecs' Zeta range uses the patented Electrokinetic Sonic Amplitude (ESA) technology to measure the electrokinetic and surface charge properties of concentrated colloidal dispersions.
When combined with standard potentiometer titration, the electrophoretic mobility, surface charge density and iso-electric points of colloidal particles can be determined.
Both aqueous and non-aqueous systems can be measured, as well as pH, conductivity, temperatures and particle size on still, flowing and stirred samples.
Using the ESA system, remarkable electro kinetic measurements can be achieved while severe limitations and restictions of traditional techniques are eliminated.
Aqueous and non-aqueous dispersions in the concentration range of 0.5% to over 40% by volume of the dispersed phase can be measured, and particles up to 50 microns in size can be analysed without difficulty. Particle setting is not a problem as samples can be vigorously stirred or mixed, and no optical alignment is required.
Date added: 2015-05-25 11:34:33