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suspension

Dynamic light scattering (DLS) is a technique for determining the size of particles in a liquid suspension.

Such particles undergo random or Brownian motion, the speed of which is directly related to the size of the particles; the smaller the particles, the faster they move. When light passes through a particle suspension, the movement of the particles produces fluctuations in the intensity of scattered light. Detection and analysis of the light-scattering fluctuations allows us to calculate the particles’ radius.

Polymer latex spheres can be used to verify DLS performance because they are available as well-characterised dispersions of near-perfect spheres.

While DLS is a well-established technique for determining the average radius of a monodisperse sample, it is a significant challenge to distinguish particles with different sizes in a single suspension. The ability to resolve multiple particle sizes depends on several factors, including the sizes of the particles, their relative scattering intensities, the polydispersity of their size distributions, the quality of the sample preparation, and the quality of the data.

Download the application report from Anton Paar to find out how to resolve multiple particle sizes in suspensions of two and three different-sized particles by using DLS.

Anton Paar Ltd

Anton Paar develops, produces and distributes highly accurate laboratory instruments and process measuring systems, and provides custom-tailored automation and robotic solutions.

Anton Paar develops, produces and distributes highly accurate laboratory instruments and process measuring systems, and provides custom-tailored automation and robotic solutions.

It is the world leader in the measurement of density, concentration and CO2 and in the field of Rheometry. Other areas of specialty are: Viscometry, Polarimetry, Refractometry, Microwave Sample Preparation & Synthesis, Chemical and Mechanical Surface and Nanostructure Analysis.

With over 2200 employees at the headquarters in Graz (Austria) and the 25 sales subsidiaries worldwide, Anton Paar ensure that their products live up to their excellent reputation. The core competence of the company – high-precision production – and close contact to the scientific community form the basis for the quality of Anton Paar’s instruments.

A strong sales network in more than 110 countries guarantees customers rapid support and answers to their application and service queries.

Innovation is the basis for progress and every year Anton Paar invests more than 20 percent of the annual turnover in R&D.

Anton Paar Limited, a subsidiary of Anton Paar GmbH, provides sales, application support and service to users across the UK and Ireland.

With an office in St Albans (UK) and Dublin (Ireland) and a team of over 30 dedicated employees, Anton Paar Limited aims to provide first-class service at every stage in the customer relationship, ensuring our products live up to their excellent reputation.

Anton Paar Ltd
Unit F, The Courtyard
St Albans
AL4 0LA
UK

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