Merck Patent Gesellschaft MIT Beschrankter Haftung

Willi Jost

Heinz E Hauck

Karin Cabrera

Heinz-Emil Hauck

Karl-Friedrich Krebs

Andrea Junker-Buchheit

Coded thin layer chromatography support

In adsorption and chromatography proceseses for the separation of at least one substance from a mixture of substances, silicon carbide is used as the adsorbent and as a support material in such processes.

Adsorbents for chromatography and adsorption processes

New separation materials for thin layer chromatography are based on carrier materials coated with an adsorbent silica gel layer which has been surface-modified by a silanizing agent after the coating step. The degree of covering of the modifying reagent can be adjusted in a defined an controllable manner, e.g., from 0.15 to 0.8 .mu.mol/m.sup.2 in the case of reversed phase materials and 1.2 to 2.5 .mu.mol/m.sup.2 in the case of hydrophilic materials. A process for the preparation of these separation materials is also provided.

Separation materials for thin layer chromatography

New separation materials for thin layer chromatography are based on carrier materials coated with an adsorbent silica gel layer which has been surface-modified by a silanizing agent after the coating step. The degree of covering of the modifying reagent can be adjusted in a defined and controllable manner, e.g., from 0.15 to 0.8 .mu.mol/m.sup.2 in the case of reversed phase materials and 1.2 to 2.5 .mu.mil/m.sup.2 in the case of hydrophilic materials. A process for the preparation of these separation materials is also provided.

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Postfach, Germany

Willi Jost