The SEC-3010 triple detector system from Dorton Analytical performs characterisation of polymers and proteins using gel permeation chromatography/size exclusion chromatography (GPC/SEC).
The SEC-3010 is a complete GPC system comprising pump, autosampler, viscosity/refractive index detector, multi-angle light-scattering detector and Parsec Enhanced software.
The design of the SEC-3010 viscosity/refractive index detector allows the simultaneous determination of the refractive index and the intrinsic viscosity of a polymer solution.
Its technology is said to overcome the disadvantages usually encountered when using coupled detectors.
The asymmetrical bridge circuit allows 80 per cent of the sample to reach the measuring arm compared with 50 per cent in conventional instruments, thus increasing sensitivity by a factor of two.
The direct integration of the refractive index measuring cell in the analytical arm of the viscometer allows the determination of the intrinsic viscosity and the refractive index in exactly the same sample segment.
The multi-angle light-scattering detector is a modern, seven-angle detector for the characterisation of macromolecular compounds.
The sample is illuminated by a temperature-controlled laser beam.
The scattered light is collected by a CCD detector that transmits the data to the Parsec software.
Parsec Enhanced provides a complete software solution for polymer characterisation via multi-detector GPC.
The software records and evaluates the data from various combinations of GPC detectors.
It calculates the specific and intrinsic viscosity, the Mark-Houwink coefficients, the absolute molecular weights, Mn, Mw, Mz, Rg, the Mw/Mn structure coefficients and the branching parameters from the scattered light data.
All analytical methods, raw data, calibrations, results and sample information are stored in a single database, allowing simple archiving and retrieval of data.
