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Applications and Articles Applications and Articles


MOLECULAR WEIGHT DETERMINATION


Why is Flow Rate Important in GPC/SEC?

To obtain reliable data from your GPC/SEC instrument - each run should be related to a calibration curve obtained by measuring appropriate chromatographic standards. Calculations from GPC/SEC experiments are based on elution volume, which is a product of time and flow rate...Read More


Static Light Scattering of Biomacromolecules

Static Light Scattering (SLS) is capable of measuring the average molecular weight of polydisperse materials, as well as of samples with discrete aggregation numbers, such as proteins. Synthetic polymers are intrinsically polydisperse and are well-suited to direct analysis using this technique, thus the meaning of an average molecular weight is more direct...Read More


How Enhanced Detector Stability Leads to Improved GPC/SEC Results

GPC (Gel Permeation Chromatography) or SEC (Size-Exclusion-Chromatography is widely acknowledged as one of the most useful characterization methods in polymer science. The technique offers the possibility to determine molecular weight distribution and its averages, to provide a complete picture of the polymer sample under investigation...Read More


Light Scattering: a key Tool for Performance Polymer Characterisation

The majority of modern performance polymers are designed to enhance a particular material property. A number of high-profile engineering plastics, resins, and gels are made from these kinds of precursors. Light scattering can be used to solve many of the unique problems encountered when working with unusual functional plastics and associated polymeric precursors...Read More


High Performance GPC/SEC System

Gel-permeation chromatography (GPC) coupled with Multi-Angle Static Light Scattering (SLS) is a modern and powerful technique for determining absolute molecular weight values without the need to rely on traditional column calibration... Read More


Determination of specific refractive index increment (dn/dc)

The specific refractive index increment (dn/dc) is a fundamental parameter for the determination of molecular weight with Static Light Scattering... Read More


Common detectors for GPC/SEC Chromatography

This article provides an overview about the detectors most commonly used in GPC/SEC applications, explains differencies... Read More