whehosting.blogg.se - Malvern zetasizer

Minimum sample volume: 150 µL (20 µL using diffusion barrier method).

Measurement range: 3.8 nm – 100 µm (diameter).

Measurement range: 0.3 nm – 10.0 µm (diameter).

From this the average molecular weight and second virial coefficient A 2can be calculated, which gives a measure of molecule solubility. In this technique, the scattering intensity of a number of concentrations of the sample is measured, and used to construct a Debye plot.

Static Light Scattering is used to determine the molecular weight of proteins and polymers.

An available surface zeta potential accessory uses tracer particles to measure electro-osmosis close to a sample surface to calculate the zeta potential of the surface.

An electric field is applied to a solution of molecules or a dispersion of particles, which then move with a velocity related to their zeta potential. Laser Doppler Micro-electrophoresis is used to measure zeta potential.Measurement of size as a function of concentration enables the calculation of k D, the DLS interaction parameter. This technique measures the diffusion of particles moving under Brownian motion, and converts this to size and a size distribution using the Stokes-Einstein relationship. Dynamic Light Scattering (DLS) is used to measure particle and molecule size.Should your needs change, your Zetasizer can adapt to new challenges.The Zetasizer Nano ZS incorporates three techniques in a single compact unit: Choose Red Label for more challenging sample types, such as proteins, surfactant solutions and low solid content samplesĪll Zetasizer Advance systems offer on-site upgradeability with minimal downtime.Choose Blue Label for routine sample investigation such as metallic colloids, metal oxides and pigments.In addition, each benefits from advances including Adaptive Correlation, M3-PALS zeta potential analysis, constant current zeta mode and our deep learning-based data quality advice system.Įach of the three models is available as a Blue Label or Red Label variant: Zetasizer Advance is the successor to the highly successful and market-leading Zetasizer Nano.Įach of the three models in the Zetasizer Advance Range offers particle size, particle charge (zeta potential) and molecular weight analysis.