Band Broadening Function in Size Exclusion Chromatography of Polymers
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Band Broadening Function in Size Exclusion Chromatography of Polymers
Gregorio Meira, Milos Netopilík, Martin Potschka,
Irene Schnöll-Bitai, Jorge Vega
Macromolecular Symposia 2007, 258, 186–197
doi: 10.1002/masy.200751221
This article reviews some recent developments on the determination of the Band Broadening Function (BBF) in Size Exclusion Chromatography (SEC) of polymers. The correction for band broadening (BB) is important for quantitative determinations of the molar mass distribution (MMD) of narrow-distributed (or highly multimodal) polymers, and of derived variables such as kinetic parameters. In the narrow range of a molar mass standard, the BBF is uniform and of positive skewness. In a broad chromatographic range, the BBF is non-uniform and skewed; and it can be adequately represented by an exponentially-modified Gaussian function (EMG) of 2 parameters that vary slightly with elution volume: an increasing Gaussian variance and a decreasing exponential decay. Additionally, the total BBF variance remains almost constant if not close to the total exclusion limit. The following methods for determining BBF parameters are reviewed: a) a direct method based on assuming Poisson-distributed MMDs; b) a direct method based on measuring the mass- and molar mass chromatograms of narrow standards; c) a theoretical method based on a stochastic model that is equivalent to the Gidding-s-Eyring model; and d) a theoretical method based on a deterministic model obtained through an extension of the classical van Deemter expression. Ideally, the correction for BB requires a robust numerical inversion algorithm. However, alternative simplified solutions are also possible.
This article is the final report of the IUPAC project 2003-023-2-400.
www.iupac.org/projects/2003/2003-023-2-400.html
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Articles in the same Issue
- Masthead
- From the Editor
- Contents
- The Role of ICTNS in the Project System
- The Father of Toxicology?
- Chemistry for Biology
- Scientifiques Sans Frontières Australia
- Three Decades of IUPAC Initiatives
- Goals and Outcomes of the Flying Chemist Program
- Council Round Table Discussions: Actions Arising from Torino
- Solubility Data Compilations for the Practicing Chemist
- Water in the Gaza Strip
- Luis Oro to become EuCheMS President
- On the Environmental Impact of Altered Pesticide Use on Transgenic Crops
- Future Energy: Improved, Sustainable, and Clean Options for Our Planet
- Green Book: Abridged Version
- Postgraduate Course in Polymer Science
- Chemical Issues in Biomass Burning in Sub-Saharan Africa
- Green Chemistry, Sustainable Development, and Social Responsibility of Scientists
- Provisional Recommendations
- Acetonitrile: Ternary and Quaternary Systems
- Band Broadening Function in Size Exclusion Chromatography of Polymers
- Green-Sustainable Chemistry
- Biophysico-Chemical Processes of Heavy Metals and Metalloids in Soil Environments
- Functional and Biological Gels and Networks: Theory and Experiment
- Polychar-15 World Forum on Advanced Materials
- Heterocyclic Chemistry at a Glance
- Compendi De Nomenclatura De Química Analitica
- Greenhouse Gases: Mitigation and Utilization
- Mendeleev Congress on General and Applied Chemistry
- Novel Materials and Fine Chemistry
- Public Health Applications of Human Biomonitoring
- Vanadium
- Solubility and Equilibria
- Humic Substances
- Macromolecules and Materials
- Chemistry for Sustainable Development
- Thermophysical Properties
- Mark Your Calendar
