Separation materials for thin layer chromatography

Details Separation materials for thin layer chromatography Separation materials for thin layer chromatography

1987-02-11

1988-05-03

Therkorn, Ernest G.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210658, 2101983, 2105021, 436162, 502401, 502402, 502439, B01D 1508

Patent

active

047418303

ABSTRACT:
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.

REFERENCES:
patent: 4029583 (1977-06-01), Chang et al.
patent: 4276061 (1981-06-01), Nestrick
patent: 4295968 (1981-10-01), Halpaap et al.
patent: 4324689 (1982-04-01), Shah
patent: 4544485 (1985-10-01), Pinkerton et al.
Colloid Chemistry of Silica and Silicates by Iler, Cornell University Press, Ithaca, N.Y. 1955, pp. 36-38 relied on.
Patent Office Translation of German Patent No. 2,809,137, PTO-5291 Sep. 1987.
"Recent Developments in the Evaluation of Chemically Bonded Silica Packings for Liquid Chromatography", Journal of Chromatography, 125 pp. 115-127 (1976) by Unger et al.

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