Submitted by: Submitted by Patrick1Gall
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Category: Science and Technology
Date Submitted: 10/18/2016 11:42 PM
Wyatt Technology Corporation Launches the ViscoStar III
Online Viscometer for Polymer and Protein Characterization
1888 PressRelease The Next Generation of Viscometers is launched with ViscoStar III by Wyatt Technology for
unmatched sensitivity, stability, and broadest range of solvents for macromolecular characterization.
Houston, TX Wyatt Technology, the world leader in instrumentation for absolute macromolecular
characterization, announces the launch of the third generation of intrinsic viscosity detectors: the ViscoStar
III.
Used in conjunction with gel permeation chromatography (GPC) systems and multiangle light scattering
(MALS) detectors, such as the company's DAWN and miniDAWN, the ViscoStar III can determine the molar
mass, size and conformation of all types of macromolecules, including polymers and proteins. The ViscoStar
III's sensitivity, dynamic range, resolution and stability surpass other GPC viscometers by at least an order of
magnitudeall while retaining robustness, easeofuse and serviceability.
Advanced Technology
All contemporary online viscometers utilize a capillary bridge for highly sensitive measurement of
differential pressures arising from the differences in viscosity of solutions passing through the capillaries.
The four arms of the bridge must be perfectly balanced in order to make the most sensitive measurements;
however, even a wellbalanced bridge is inherently susceptible to systematic noise due to dynamic pressure
pulses generated by the chromatography pump. At the heart of the ViscoStar III are two key advances for
overcoming these issues: thermal bridge tuning and complete impedance matching.
Thermal bridge tuning performs rapid, nonmechanical balancing of the capillary resistances to ensure
perfect bridge balance on every GPC run, even after material has accumulated on the capillary walls and
skewed the original bridge symmetry. Complete impedance matching goes beyond simple resistive bridge ...