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separation of sulfoxides and 3.5-dinitrobenzoates uia high-pressure liquid chromatography on silica-bound 2,2,2-trifluoro-l-(9-anthryl)ethanol); M Mintas, A. Mannschreck, J. Chem. SOC. Chem. Commun. 1979, 602 (separation of trans-1.2-diphenylcyclopropane on cellulose triacetate). B. Feringa. W. Wynberg, Rec. Trav. Chlm. Pays-Bas 97. 249 (1978) (separation of arenes on silica gel impregnated with ( + )-TAPA).Many technically interesting porous solids, e. g. ion exchangers or adsorbents for catalysis, are swellable polymers, i. e. the pore structure depends on the solvent medium. A method based on exclusion chromatography, permits determination of the pore size and pore size distribution in the swollen state.-Size exclusion chromatography, also referred to as gel permeation, gel filtration, or molecular sieve chromatography, is a widely employed method for the separation of dissolved substances-mostly polymer mixtures-according to their molecular size. Porous solids are used as stationary phase. Conversely, pore sizes and other structural data can be determined by exclusion chromatography. This application requires a series of standards (polymer samples) of known molecular weight. As a simple and rapid method, it has already proven valuable for such determinations in the case of rigid solids; in the case of swellable solids, this constitutes the sole method by which the pore structure can be characterized: classical methods require dry samples. __ [ "I Part of the Ph. D. Thesis by P. Vogfel, Universitat Saarbrucken 1977.limited information value.

Sulfoxiden und 3,s-Dinitrobenzoylderivaten durch Hochdruckfliissigkeitschromatographie an Silicagel-gebundenem 2,2,2-Trifluor-1-(9-anthryl)ethanol): M. Mintus, A. Mannschreck, J. Chem. SOC. Chem. Commun. 1979,602 (Trennung von fruns-1,2-Diphenylcyclopropan an Triacetylcellulose); B. Feringa, W. Wynberg, Rec. Trav. Chim. Pays-Bas 97, 249 (1978) (Trennung von Arenen an ( + )-TAPA-impragnierlem Silicagel).