Hydrated Silica Gel Research Articles

Proton nuclear magnetic resonance technique for determining the surface hydroxyl content of hydrated silica gel

Proton nuclear magnetic resonance technique for determining the surface hydroxyl content of hydrated silica gel

Etude de structures peptidiques à l'aide du phénylisothiocyanate VI[1]. Chromatographie sur couche mince de phénylthiohydantoïnes dérivées d'acides aminés

AbstractTwo substrates, hydrated silica gel and alumina, have been used to separate phenylthiohydantoines derived from amino acids, using thin layer chromatography.

Adsorption of aliphatic amines on aluminum oxide and silica

1. Absolute adsorption isotherms have been obtained for n-butylamine and diethylamine vapor along with absorption from solutions in n-heptane on silica gel and aluminum oxide. 2. Either in the vapor form or from solutions in n-heptane, the amines are to a considerable extent irreversibly adsorbed on hydrated silica gel and aluminum oxide surfaces. 3. The amine molecules are more densely adsorbed from liquid solutions than from vapors, the area occupied by a molecule in the dense adsorbed layer being 20–25 A2 for adsorption from solutions, and 35–45 A2 for adsorption from vapors.