The Viscotek 270 detector from Malvern Panalytical can be used in a modular and advanced GPC/SEC unit. It is offered as a separate module for linking to other chromatography components such as the Viscotek GPCmax, other types of GPC/SEC system, or as a part of the 270max unit.
The Viscotek 270 detector can be provided as a single detector i.e. viscometer or light scattering, or as a dual detector i.e. combination of light scattering and viscometer.
The Viscotek 270, in its full dual detector form, comprises a differential viscometer detector and a low angle light scattering detector.
The triple detection system can also be integrated with an RI detector and can provide advanced chromatography where the complementary data on the sample molecule can be gathered from all the detectors.
The results from the Viscotek 270 may include data associated with molecular size (Rh and Rg), molecular weight distribution, intrinsic viscosity, concentration and branching data. Supplementary compositional data can be obtained if a photodiode array UV detector is added.
The main features of the Viscotek 270 detector are as follows:
- Central viscosity detector provides polymer structure data
- Molecular size in terms of hydrodynamic radius (Rh) and Rg
- Numerous calibration and GPC/SEC calculation types
- Right angle light scattering establishes sensitive absolute molecular weight of small polymers
- Low angle light scattering offers absolute molecular weight of polymers without extrapolation
- 21 CFR part 11 compliant
As experts in polymer characterization, offering over 30 years of experience in the field, Jordi Labs use Viscotek GPC systems for routine quality control, failure analysis, and product deformulation. The ability to compare polymer molecular weight, intrinsic viscosity and molecular size in a single measurement is powerful for identifying subtle differences in a polymer system. We especially like the ability to prepare and evaluate the Mark Houwink plots to compare branching in polymer systems. Two high temperature systems are also used extensively for polyethylene and polypropylene characterization.
Dr Mark Jordi, President, Jordi Labs LLC