By analysing responses from two concentration detectors, the system corrects the limitations of a single detector to deliver rapid determination of copolymer concentration and concentration profile
Viscotek has introduced a new fully functional GPC/SEC system for characterising copolymers.
Bringing together its triple detector array (TDA), GPCmax integrated pump, autosampler and degasser module and powerful OmniSec software, the new system is able to cope with even the most demanding copolymer analyses.
The TDA harnesses the power of RI, UV and viscometry or light scattering detectors acting together, with each detector providing complementary but different information.
By analysing the ratios of the responses from the two concentration detectors, the system corrects the limitations of using a single detector - delivering rapid determination of copolymer concentration and a true concentration profile.
Through adding the viscometry or light scattering detector, the TDA enables users to obtain molecular weight, molecular size, intrinsic viscosity, conformation, structure and branching data from their copolymer sample.
Maintained in a thermostatically controlled environment, the TDA has the sensitivity and stability to repeatably characterise copolymers even at low concentrations.
Specifically designed for GPC/SEC applications the GPCmax integrates optimised pump, autosampler and degasser modules in a compact benchtop instrument and is fully controllable from OmniSec software.
Benefiting from Viscotek's experience of providing leading edge solutions for polymer characterisation, the GPCmax delivers the superior performance normally expected only from a top-of-the-range system, claims Viscotek.
Incorporating a programmable variable loop autosampler, the GPCmax provides reproducible sample injection and eliminates the need for sample transfer.
The in-line degasser removes dissolved gases, ensuring optimum performance from concentration, viscosity or light scattering detectors.
The GPCmax's robust isocratic pump provides constant and smooth solvent flow to ensure precise, repeatable results.
Data from the TDA and the GPCmax is collected and processed seamlessly in the OmniSec software.
OmniSec is said to be the first fully 21CFR Part 11 compliant GPC/SEC software to provide an integrated software solution that helps maximise the information extraction and efficiency of copolymer characterisation experiments.
The software's advanced facility for calculating dn/dc for every slice of copolymer data greatly enhances analytical accuracy and is particularly advantageous when using light scattering detection, says Voscotek.
The ability to graph copolymer percent as a function of elution volume and store calibration tables for different copolymer types further increases operational versatility and ease of use.
Sample types that will benefit most from the new software module include synthetic polymers such as styrene-butadiene copolymers, pegylated proteins, and natural copolymers such as protein polysaccharides.
