Tag Archives: ISO13321


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 >

Tags: , , , ,

Published 31 Mar 2015

PDI from an individual peak in DLS

Can one calculate a PDI value excluding a small aggregation peak? For example if the main particle species is ~100nm and there is a small contribution (2% by intensity) from a peak at 5 microns, is it possible to recalculate…READ MORE >

Tags: , , , ,

Published 10 Jul 2014

FAQ: Peak size or z-average size – which one to pick in DLS?

In dynamic light scattering (DLS) the intensity autocorrelation function of the scattered light is measured. This function is then fit to obtain a size. There are two main fitting algorithms which may confuse users: Cumulant (or z-average) size and polydispersity…READ MORE >

Tags: , , , ,

Subscribe