Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1980-02-26
1982-04-13
Konopka, P. E.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
2101982, B01J 2030, B01J 2022, B01D 1508
Patent
active
043246893
ABSTRACT:
A reverse-phase chromatographic packing having a carbon content of over 20% by weight is prepared by hydrolyzing silica gel with a mixture of sulfuric and nitric acid, washing the treated silica gel and drying it, reacting the hydrolyzed silica gel with an alkylchlorosilane, washing the product, and drying it all under conditions which maintain a moisture content in the silica.
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Howard, G.A. et al., The Separation of the C.sub.12 -C.sub.18 Fatty Acids by Reversed-phase Partition Chromatography, Biochem. J., vol. 46, 1950, pp. 532-538.
Majors, R. E. et al., Studies of Siloxane Phases Bonded to Silica Gel for Use in High Performance Liquid Chromatography, J. Chromatog., vol. 12, 1974, pp. 767-778.
Kingston, David et al., Preliminary investigation of the use of high-pressure liquid chromatography for the separation of indole alkaloids, J. Chromatog., vol. 104, 1975, pp. 431-437.
Kingston, David et al., Preparation of octadecyl Porasil for reversed-phase _liquid chromatography, J. Chromatog., vol. 116, 1976, pp. 182-183.
Scott, R. P. W. et al., Examination of Five Commercially Available Liquid Chromatographic Reversed Phases (Including Nature of the Solute-Solvent-Stationary Phase Interactions Associated with Them), J. Chromatog., vol. 142, 1977, pp. 213-232.
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