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Electrophoretic Light Scattering (ELS) is a technique used to measure the electrophoretic mobility of particles in dispersion, or molecules in solution. This mobility is often converted to Zeta potential to enable comparison of materials under different experimental conditions.

The fundamental physical principle is that of electrophoresis. A dispersion is introduced into a cell containing two electrodes. An electrical field is applied to the electrodes, and particles or molecules that have a net charge, or more strictly a net zeta potential will migrate towards the oppositely charged electrode with a velocity, known as the mobility, that is related to their zeta potential.

Malvern Instruments offer leading instrumentation for the measurement of electrophoretic mobility. The Zetasizer Nano provides a simple, fast and accurate way to measure zeta potential, and uses a unique disposable capillary cell to ensure that there is no cross contamination between samples. The NanoSight NS500 measures electrostatic potential particle-by-particle to produce number-weighted, not intensity-weighted, data, avoiding any bias towards larger particles.

Related products

Zetasizer range The world's most widely used system for nanoparticle, colloid and protein size, zeta potential and molecular weight measurements. Zetasizer range - particle size, dynamic light scattering, zeta potential, protein aggregation
Measurement
Molecular size, Particle size, Molecular weight, Zeta potential
Temperature range
90°C
Particle size range
0.3nm to 10µm
Dispersion type
Wet
Technology
Dynamic Light Scattering, Static Light Scattering, Size Exclusion Chromatography, Electrophoretic Light Scattering
More information
NanoSight NS500 Single particle zeta potential platform with integrated fluidics for automation. NanoSight NS500 single particle size distribution, fluorescence, zeta potential measurment
Measurement
Particle size, Particle concentration, Protein aggregation, Zeta potential
Particle size range
10nm to 2000nm
Technology
Nanoparticle Tracking Analysis, Electrophoretic Light Scattering
More information
 
 

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The Importance of Zeta Potential in Water Treatment Process Control Webinar - Recorded (English)

Control of the flocculation process and adjustment of coagulant dose during the course of water and waste water treatment is often a challenging step in the water treatment process. Zeta potential is a measure of the electrical potential between part...

Product:
Zetasizer WT
Date recorded:
March 17 2016
Language:
English


Demo at your desk: Zetasizer Webinar - Recorded (English)

This online demo is designed to provide you with a virtual hands-on introduction to the Zetasizer Nano. You will be able to take a look at the Zetasizer Nano and some of its accessories via webcam. We will screen-share the software with you so that y...

Product:
Zetasizer Nano range
Date recorded:
February 25 2016
Language:
English


Introducing the New On-line Zetasizer WT - Zeta Potential Clarifies Coagulant Dosing Webinar - Recorded (English)

This webinar organised by IChemE's Water Special Interest Group introduces the Zetasizer WT to the water treatment community. The Zetasizer WT is a robust and practical on-line measurement system that enables optimized coagulant dosing during the wat...

Product:
Zetasizer WT
Date recorded:
January 13 2016
Language:
English


Orthogonal and complementary nanoparticle characterization techniques Whitepaper (English)

How can I trust my data? Is it affected in any way by the measurement technology, or  by the user through sample preparation or the analysis parameters employed? Independent and orthogonal measurement modalities should be used to provide measurement ...



Colloidal Stability & Conformational Changes in β-Lactoglobulin: Unfolding Unfolding to Self-Assembly Article (English)

A detailed understanding of the mechanism of unfolding, aggregation, and associated rheological changes is developed in this study for β-Lactoglobulin at different pH values through concomitant measurements utilizing dynamic light scattering (DLS), o...


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