Tag Archives: refractive index


Published 28 Jan 2021

Laser Diffraction for Particle Sizing – Theory Simply Explained in One Figure

Of course. We have very well written notes and instructions. And with our help on method developments, cases are rare when we ponder on the fundamental theories behind the technology of Mastersizer 3000. Nevertheless, we will need to troubleshoot, to…READ MORE >

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Published 20 Jun 2019

How does multi-detector GPC/SEC work?

Whether your samples are synthetic polymers, natural materials such as polysaccharides, or proteins, antibodies, or other biological samples, gel permeation / size exclusion chromatography (GPC/SEC) is the ideal technique for characterizing those and other types of macromolecules.  The information offered from…READ MORE >

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Published 12 Sep 2018

The added value of a Malvern Panalytical OMNISEC purchase

When thinking about a reason to purchase a particular piece of scientific equipment, you want to know not only that you are getting the best piece of kit, but also that you’ll be maximizing the return on your investment.  Manufacturers…READ MORE >

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Published 7 Mar 2017

Can I use DLS for xyz?

How can I use DLS for sample xyz? What is the best sample concentration / refractive index for reliable DLS size measurements? Has it been done before? In Dynamic Light Scattering (DLS) we analyze intensity fluctuations in the sample to…READ MORE >

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Published 17 Nov 2014

Tips and Tricks for Nanoparticles

Nanoparticle Characterization A few days ago we hosted a live webinar titled “Nanoparticle Size Characterization: Tips & Tricks with the Zetasizer Nano.”  This seems to have been a topic of interest for many of you, since – with apologies –…READ MORE >

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Published 5 Aug 2014

How important is the refractive index of nanoparticles?

Do refractive index and absorption matter for nanoparticles? Abstract: We discuss the refractive Index of Gold, Silver, Titanium and Other NanoParticles. In this post we also point out refractive index of some polymers. Finally, we look at whether the refractive…READ MORE >

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Published 9 Jan 2014

The Chromatogram Series: Polyvinylpyridine PVP

Lithium/iodine-PVP batteries were invented over 40 years ago. While the design has improved over the years, the same concept is still in reliable use in implanted pacemakers today. With clinical data covering decades the performance of these batteries is well…READ MORE >

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Published 25 Oct 2013

Customer GPC school in Houston

Yesterday marked the end of yet another great GPC school in Houston. It was the third one of its kind that we have hosted in our main Viscotek office in 2013, and I hope it was of value to all…READ MORE >

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Published 18 Jun 2013

Refractive index increment dn/dc values

Refractive index increment dn/dc values when you need them? In light scattering a crucial parameter that appears together with the Rayleigh Ratio RΘ is the refractive index increment, also known as “dn/dc”. Typically, Kc/RΘ is plotted versus concentration to extrapolate…READ MORE >

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