Lab Manager | Run Your Lab Like a Business

Product News

Highly Stable DRI Detector Improves GPC/SEC Results

The baseline signal stability of any liquid chromatography detector is very important, as it is a limiting factor in peak determination

by Testa Analytical Solutions
Register for free to listen to this article
Listen with Speechify
0:00
5:00
The Differential Refractive Index (DRI) detector from Testa Analytical Solutions e.K.
Testa Analytical Solutions e.K.

The Differential Refractive Index (DRI) detector from Testa Analytical Solutions e.K. offers unmatched accuracy and reliability for determination of absolute concentration and total mass balance in gel permeation chromatography / size exclusion chromatography (GPC/SEC) applications.

The baseline signal stability of any liquid chromatography detector is very important, as it is a limiting factor in peak determination. Detector stability gains even more importance where analysis time is long, such as is commonly encountered in high resolution GPC/SEC applications.

Get training in Materials and Substance Tracking and earn CEUs.One of over 25 IACET-accredited courses in the Academy.
Materials and Substance Tracking Course

Use of multiple columns is common in GPC/SEC as a technique to increase resolution and also to increase the available dynamic range in terms of molecular weight. As such, high resolution GPC/SEC measurements can often take 30 to 60 minutes for a single separation. As a result, most HPLC detectors adapted for use in GPC/SEC will show a significant baseline drift between the beginning and end of the chromatogram thus negatively influencing the ability to accurately determine the beginning and end of sample peaks and therefore to calculate the correct polydispersity.

Operating from room temperature up to 80°C with high thermal stability, TESTA Analytical's DRI detector has been designed with particular attention to eliminating drift. As a consequence of its unmatched baseline stability, the DRI detector delivers excellent performance for chromatographic separations of any duration.

For further information on the Differential Refractive Index (DRI) detector, please visit https://www.testa-analytical.com/gpc-sec-chromatography.html or contact Testa Analytical Solutions on +49-30-864-24076 / info@testa-analytical.com.

Testa Analytical Solutions

Testa Analytical Solutions