The COMBO-ONE Viscometer/DRI detector from TESTA Analytical is designed for demanding GPC/SEC applications such as those focused on investigating the structure and branching of polymers.
The dual detector is designed to eliminate ‘sample breakthrough’ to allow more rapid sample sequencing and reduce the amount of solvent required for each measurement. Developer Carlo Dessy said: “The result of our design innovation is to increase the total daily throughput of a GPC/SEC System by a factor of two.
“Another benefit of the COMBO-ONE detector is its high sensitivity and resolution. This is achieved as our differential refractometer is an integral part of the viscometer – therefore both concentration and viscosity are measured at the same time on the very same sample segment. When branching calculations and structure investigations are the goal of GPC/SEC analysis, resolution and sensitivity are the most important parameters users must optimise for useful results.”