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6 results on '"Held Daniela"'

3. Efficient Validation of GPC/SEC Instruments with EasyValid.

Author

Held, Daniela

Subjects
GEL permeation chromatography, CHROMATOGRAPHIC analysis equipment, SCIENTIFIC apparatus & instruments, DETECTORS, MANUFACTURED products
Abstract

Validation is a time consuming process, consisting of many steps. OQ/PV for GPC/SEC systems can be efficiently done with PSS EasyValid, a tool that ensures fast and accurate validation and provides typical GPC/SEC results. It is suitable for all GPC/SEC systems, independent on instrument model, detector type and system manufacturer. [ABSTRACT FROM AUTHOR]

Published
2009

4. Automated USP and EP GPC/SEC Analysis of Low Molecular Weight Heparin (LMWH).

Author

Held, Daniela

Subjects
MOLECULAR weights, HEPARIN, GEL permeation chromatography, EQUIVALENT weights (Chemistry), MOLAR mass
Abstract

The article discusses an automated analysis of low molecular weight heparin (LMWH). The method that was chosen was gel permeation chromatography/size exclusion chromatography (GPC/SEC) to measure the molecular weight. It is noted that a true molar mass distribution was shown by WinGPC Unity with a w(log M) axis.

Published
2010

5. Quick and Easy Membrane Characterization with GPC/SEC.

Author

Held, Daniela

Subjects
GEL permeation chromatography, CHROMATOGRAPHIC analysis, MOLECULES, CHROMATOGRAMS, GAS chromatography
Abstract

Describes the use of size exclusion chromatography for the characterization of molecules differing in size and molar mass. Determination of molar mass distributions and molar mass averages; Comparison of the chromatograms of a stock solution; Measurement of filtrate on a conventional gas chromatography system/gel permeation chromatography.

Published
2005

6. Structure Elucidation with Molar Mass Sensitive Detectors.

Author

Kilz, Peter and Held, Daniela

Subjects
POLYMERS, DETECTORS, VISCOSIMETERS, CHROMATOGRAMS, CHROMATOGRAPHIC analysis, MOLECULAR weights
Abstract

GPC coupled with molar mass sensitive detectors s a powerful method to investigate polymer structures and branching. This brief application note describes what kind of information you can expect. [ABSTRACT FROM AUTHOR]

Published
2004

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