System and method for determining molecular weight and intrinsic viscosity of a polymeric distribution using gel permeation chromatography
US6064945A · kind A · utility
15Cited by
1References
18Claims
0Family size
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Key dates
| Filing date | Feb 20, 1998 |
| Grant date | May 16, 2000 |
| Priority date | — |
| Expiry date | Feb 20, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/885
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and method for analyzing data from a gel permeation chromatography (GPC) or size exclusion chromatography (SEC) system for determining a polymeric sample's molecular weight distribution (MWD) and intrinsic viscosity law (IVL). Data from two or more detectors is used with a least-squares minimization fit. A novel method includes the simultaneous determination of a sample's MWD and IVL using data from two or more detectors. Detectors include a Light Scattering (LS) detector, viscometer (V) and a refractive index (RI) detector. The present invention is insensitive to detector noise in the baseline regions of the peak curve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.