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New analyser for polymer and protein characterisation

31st July 2018


The BI-MwA Molecular Weight Analyser from Testa Analytical Solutions is a high-performance tool for studying synthetic and natural polymers in solution as well as investigating protein aggregation, oligomerization, and complex formation

Employing a 30mW, 660nm diode laser, the BI-MwA uses seven angles to determine the intensity of scattered light as a function of angle and polymer concentration. Using this information, the system software is able to quickly produce Zimm, Berry and Debye plots from which weight average molecular weight (Mw), radius of gyration (Rg), and second viral coefficient (A2) data are calculated.

The BI-MwA can be used in batch or flow mode, as part of a multi-detector GPC/SEC system, or for following the kinetics of polymerisation using the time-dependent static light scattering (TDLAS) technique.

Compactly designed, the flow path of the BI-MwA is vertical avoiding trapped bubbles - a problem commonly associated with horizontal light scattering systems. The robust cell inside the BI-MwA has no sharp corners, only conical shapes meaning previously analysed samples are much more easily flushed out. 

The BI-MwA is simple to use but incorporates sophisticated features. Inject the sample into the low-volume, seven-angle flow cell. The sample is illuminated by a temperature stabilised, precision power-controlled diode laser. The ultra-stable, high-sensitivity, low-noise CCD detector automatically collects the scattered light. Then, the software extrapolates the data to zero angle for the absolute molecular weight determination.

For further information on BI-MwA Multiangle Light Scattering (MALS) detector please visit www.testa-analytical.com/Datasheets/BI-MwA.pdf or contact Testa Analytical Solutions on +49-30-864-24076 / info@testa-analytical.com.

Testa Analytical Solutions e.K. is a company dedicated to supplying the best possible instrumental solutions for characterization of polymers, particles, nanomaterials and proteins. Drawing upon over 30 years experience of technologies serving these markets, the staff at Testa Analytical are happy to share their knowledge with researchers worldwide to help provide them with a working solution for even the most demanding applications.





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