Published 23 Apr 2019
What is the standard for dynamic light scattering? How can we ensure compliance with recommended light scattering quality standards? Is there an international standard for light scattering? Recently an interesting question arrived at our help desk about the validity of…READ MORE >
Tags: 13321, 22412, DLS, International Standards, ISO
Published 31 May 2018
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 >
Tags: Au, citrate, colloid, DLS, godl standard
Published 23 Oct 2017
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 >
Tags: dispersity, DLS, dynamic light scattering, gel permeation chromatography, GPC
Published 21 Jul 2016
“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 >
Tags: correlation, DLS, DLS for beginners, dynamic light scattering, PCS
Published 26 Jan 2016
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 >
Tags: correlation, DLS, field, intercept, QELS
Published 21 Jan 2016
How do I know the minimum concentration needed for measuring the size of my protein? Zetasizer sensitivity is quite relvant for protein researchers. We are asked this question all the time when we are demonstrating the Zetasizer. Happily, if the…READ MORE >
Tags: ASEC, DLS, Mark Houwink, mass-size relationship, minimum concentration
Published 2 Jun 2015
Are you aware that the Zetasizer microV as well as the Zetasizer Nano ZSP can easily acquire molecular size data in flow? Here, ‘in flow’ means: continuously during a chromatography elution profile. So while in standard “batch” mode a cuvette…READ MORE >
Tags: DLS, dts, gel permeation chromatography, GPC, nanometrics
Published 9 Mar 2015
While at the Malvern exhibit at Pittcon quite a few visitors to our booth have asked where to find the latest software version for the Malvern Zetasizer Nano series. And we also encountered a similar question at the Short Course #…READ MORE >
Tags: 7.13, BIOS, classic, DLS, download