Merck Patent Gesellschaft MIT Beschrankter Haftung

Merck Patent Gesellschaft MIT Beschraenkter Haftung

Herbert Halpaap

Karl-Friedrich Krebs

Johannes Ripphahn

Manfred Eckle

Hans Heinz

Walter Reich

Hubert Rossler

A separating material for thin-layer chromatography, comprising a substrate material coated with a thin sorbent layer, wherein the sorbent layer optionally contains a binder, an indicator, or both, is improved in that the sorbent layer has a surface modified by reacting the sorbent layer with a silanizing agent without the exclusion of moisture.

Separating materials for thin layer chromatography and their preparation

Magnesium, calcium, strontium, barium, zinc and/or cadmium tungstate and/or calcium molybdate are good fluorescent indicators for use in sorption agents for chromatography. They are especially useful because of the stability of their fluorescent properties to acidic treatment.

Fluorescent indicators for chromatography and sorption agents containing

TLC plates having a concentrating zone located adjacent to and before a chromatography layer are improved by using as the layer for the concentrating zone a silicon dioxide of medium pore volume (e.g., 0.5-1.5 ml/g) and a pore width of 2-15 .mu.m.

Coated carrier materials for thin layer chromatography having a

A separating material for thin layer chromatography comprising an inert substrate coated with a sorption agent consisting essentially of silica gel particles about 3 to 8 .mu.m in diameter in a layer 100-300 .mu.m thick.

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Jugenheim, Germany

Herbert Halpaap