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Zeta potential is a measure of the magnitude of the electrostatic or charge repulsion/attraction between particles, and is one of the fundamental parameters known to affect stability. Its measurement brings detailed insight into the causes of dispersion, aggregation or flocculation, and can be applied to improve the formulation of dispersions, emulsions and suspensions.

Speed of introduction of new formulations is the key to product success. Measurement of zeta potential is one of the ways to shorten stability testing by reducing the number of candidate formulations, hence reducing the time and cost of testing as well as improving shelf life.

In water treatment, monitoring dosage using zeta potential measurements can reduce the cost of chemical additives by optimizing the dosage control.

The measurement of zeta potential has important applications in a wide range of industries including; ceramics, pharmaceuticals, medicine, mineral processing, electronics and water treatment.

Malvern Instruments offer leading instrumentation for the measuring of zeta potential, or 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 single particle zeta potential distributions which can be measured simultaneously with particle size, concentration and when operating in fluorescence mode.

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
Molecular size, Particle size, Molecular weight, Zeta potential
Temperature range
Particle size range
0.3nm to 10µm
Dispersion type
Dynamic Light Scattering, Static Light Scattering, Size Exclusion Chromatography, Electrophoretic Light Scattering
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NanoSight NS500 Single particle zeta potential platform with integrated fluidics for automation. NanoSight NS500 single particle size distribution, fluorescence, zeta potential measurment
Particle size, Particle concentration, Protein aggregation, Zeta potential
Particle size range
10nm to 2000nm
Nanoparticle Tracking Analysis, Electrophoretic Light Scattering
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Silver colloids and invisible ink Webinar - Live (English)

In the early history of cryptography and ciphers then invisible inks using silver salts and other chemicals were used. Silver colloids were regularly used and abused in this area. Silver colloids are now finding application (and legislation) as bater...

September 2 2015

Non-aqueous zeta potential measurements of carbon black powders Application Note (English)

The measurement of the zeta potential of non-aqueous suspensions is challenging as the electrophoretic mobility of the particles is very small. Here we describe how the Zetasizer Nano in combination with a universal dip cell accessory gives excellent...

Suspension properties Masterclass 4: Using rheology to assess suspension stability Webinar - Recorded (English)

This presentation discusses the importance of particle size, zeta potential and rheology for a functional suspension, and demonstrates how these properties can be manipulated to induce dispersion stability.

Kinexus range,Zetasizer Nano range,Mastersizer range
Date recorded:
April 10 2013

Keywords: Suspensions, slurries and pastes English Kinexus range Mastersizer range Particle size Rheology and viscosity Zeta potential Dynamic Light Scattering Electrophoretic Light Scattering Webinar - Recorded Greenwich Time Zetasizer Nano range 

Introducing the new ON-LINE Zetasizer WT! – zeta potential clarifies coagulant dosing Webinar - Recorded (English)

Zeta potential or particle charge is the driving force responsible for the stability and flocculation of particles in a water treatment plant. Neutralization of this charge by oppositely charged coagulants is key for formation of stable, easily filte...

Zetasizer WT
Date recorded:
June 17 2015

Keywords: English Zeta potential Electrophoretic Light Scattering Plant optimization Water treatment Webinar - Recorded Eastern Time Zetasizer WT Water 

Measuring Zeta Potential - Laser Doppler Electrophoresis Explained Technical Note (English)

This technical note describes the technique used to measure zeta potential and discusses the technology used in the market leading range of Zetasizer instruments, the Nano series.

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Silver colloids and invisible ink
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