Tag Archives: QELS


Published 23 Apr 2019

Light scattering ISO standard anyone [ISO13321, ISO22412]?

What is the standard for dynamic light scattering? How can we ensure compliance with recommended light scattering quality standards? Recently an interesting question arrived at our help desk about the validity of data in the classic Zetasizer Nano software: “Hello…READ MORE >

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Published 31 May 2018

Polydispersity from a Gold Standard

How good can a gold standard be?   When performing dynamic light scattering (DLS) measurements, we sometimes encounter especially nice data. An interesting issue to consider is the level of data quality one can expect to achieve. What is the…READ MORE >

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Published 23 Oct 2017

Polydispersity – what does it mean for DLS and chromatography?

The term polydispersity (or more recently dispersity without the poly, as per IUPAC recommendation) is used to describe the degree of “non-uniformity” of a distribution.  In the field of molecular/nanoparticular characterization, there are in principle two different definitions of polydispersity,…READ MORE >

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Published 21 Jul 2016

Dynamic Light Scattering Primer (4m:22s)

“What is dynamic light scattering?” Find out in less than 5 minutes! Although we’ve gone into deeper detail in previous posts , every once in a while it’s nice to recap on the basics. A few years ago, our presentation “Dynamic Light…READ MORE >

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Published 26 Jan 2016

Intensity or Field correlation function?

In the Malvern Zetasizer software we measure the intensity auto-correlation function. This is obtained from correlating the scattering intensity with itself. The resulting intensity auto-correlation function is often denoted by the symbol G2(τ) in its normalized form. For Gaussian scattering,…READ MORE >

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