Identifying three different particle sizes in one sample with DLS

Particle suspensions often contain more than one size of particle. However, many particle analyzers cannot resolve particle mixtures, instead they detect an average of all sizes.

Particle size and size-distribution ranges are specially designed for materials to meet their end-use requirements. For example, in medical applications, particles must be the right size to pass through vessels or cell walls. More than one particle size in such a sample may show the presence of contaminants or aggregates, which can pose a serious health risk.

For coatings such as polymer latexes, on the other hand, the presence of more than one particle size can improve the viscosity, which has a great impact on how the coating is applied.

Thus, it’s important to know what particle sizes are present in a sample.

Dynamic light scattering (DLS) is a convenient and non-destructive way to measure particle sizes. Distinguishing even two particle sizes in one sample is challenging, detecting three different sizes is extremely difficult.

Click here to download the application flash from Anton Paar to find out how their Litesizer™ 500 can detect three sizes in one sample.

Anton Paar Ltd

Tel: +44(0)1992514730info.gb@anton-paar.comwww.anton-paar.com