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Dispersion in gel permeation chromatography. A rapid numerical solution to Tung's integral equation
Author(s) -
Smit J. A. M.,
Hoogervorst C. J. P.,
Staverman A. J.
Publication year - 1971
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1971.070150615
Subject(s) - polystyrene , dispersion (optics) , logarithm , elution , gel permeation chromatography , calibration , volume (thermodynamics) , chromatography , molar mass distribution , materials science , analytical chemistry (journal) , calibration curve , chemistry , thermodynamics , mathematics , physics , optics , mathematical analysis , statistics , detection limit , polymer , composite material
A rapid iteration method has been developed to correct the molecular weight averages calculated from raw GPC data for dispersion. Though simple in its performance, it covers the general case that the instrumental spreading characteristics (Tung's resolution factor h ) depend on the elution volume. Moreover, it is irrelevant whether the calibration curve, being the logarithmic plot of the molecular weight versus the elution volume, is linear or not. The method has been applied to a number of well‐characterized polystyrene mixtures and yields molecular weight averages which agree with those predicted theoretically. The effect of asymmetry exerted by the dispersion on both molecular weight averages M̄ n and M̄ w is also discussed.