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Gel permeation chromatography: Physical characterization and chromatographic properties of porasil
Author(s) -
Cooper A. R.,
Barrall Edward M.
Publication year - 1973
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.1973.070170419
Subject(s) - porosimetry , gel permeation chromatography , chromatography , permeation , adsorption , porosity , size exclusion chromatography , polystyrene , materials science , chemical engineering , silica gel , scanning electron microscope , chemistry , desorption , porous medium , membrane , polymer , organic chemistry , composite material , biochemistry , engineering , enzyme
Porasil Porasil is the Water Associates registered trademark for a powdered porous silica chromatographic substrate. porous silica has been characterized by the methods of gas adsorption–desorption isotherms, mercury porosimetry, and electron microscopy. The pore structure has been shown to be quite heterogeneous, particularly at the surface of the particles. From the same sample of Porasil, columns were packed and calibrated in a gel permeation chromatograph. The availability of high molecular weight fractions of polystyrene allowed the exclusion limit of these materials to be determined for the first time. The heterogeneous pore structure did not seem to affect the effectiveness of these materials for macromolecular separation.