Tag Archives: sec-mals


Published 7 Jul 2021

OMNISEC consumables on the eStore!

A GPC/SEC system contains a lot of parts!  In addition to columns and standards, there are a number of consumable items required to actually use the instrument.  Since I didn’t get to them in my last post, this one will…READ MORE >

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Published 10 Jun 2021

The importance of the post-column filter

I began this post with the intention of discussing the most popular GPC/SEC consumables available from the Malvern Panalytical eStore.  As with my previous posts on columns and standards, my goal was to provide a list of consumables to keep…READ MORE >

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Published 6 May 2021

Aggregates! And what they look like in GPC/SEC data

One of the pleasures of working in the Applications Lab is that I get to analyze a variety of GPC/SEC sample types.  I can be finishing up a set of biodegradable polyesters, currently running low molecular weight oligomers, while getting…READ MORE >

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Published 20 Apr 2021

What can compositional analysis do for me?

A few days ago, my colleague Dr. John Stenson previewed the upcoming launch of the OMNISEC software’s newest feature: compositional analysis!  Amidst your excitement at the great content headed your way, you might be wondering, “what can compositional analysis do…READ MORE >

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Published 10 Mar 2021

GPC/SEC standards from the eStore!

In my last post, I highlighted the most common GPC/SEC columns available from the Malvern Panalytical eStore.  Just like with columns, scientists rely on the selection of appropriate GPC/SEC standards to generate reliable methods and obtain quality results.  In order…READ MORE >

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Published 25 Sep 2019

Rh or Rg: Which is best for my GPC/SEC samples?

The primary goal when employing gel permeation / size exclusion chromatography (GPC/SEC) is often to determine the molecular weight of a macromolecular sample.  Multi-detector systems, such as Malvern Panalytical’s OMNISEC and TDAmax systems, are able to offer a range of…READ MORE >

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Published 13 Aug 2019

Can my GPC/SEC chromatogram be trusted?

You’ve done the hard parts to get your GPC/SEC instrument ready: prepared the mobile phase, stabilized the detector baselines, and prepared your sample.  After injection and completion of your sample sequence, you have acquired data.  Congrats!  Now, before you even…READ MORE >

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Published 19 Sep 2018

Which light scattering detector is best for me?

Determining which gel permeation/size exclusion chromatography (GPC/SEC) system is best for your needs can be a daunting task. Even after you’ve decided to include a light scattering detector to obtain absolute molecular weight data you’re still left to choose between…READ MORE >

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Published 22 Aug 2018

What is a dn/dc value and why is it important for GPC/SEC?

The most common detector in any GPC/SEC instrument is a refractive index (RI) detector.  There are multiple reasons for this, but the most important is because the difference in refractive index between that of a sample solution and that of…READ MORE >

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