Inverse phase gas chromatographic study on non-extractable modifiers for silica gel. II- solubility and surface parametersAuthor(s): N.E.Moustafa
The silica gel was modified with non-extractable thin film of polyethylene glycol-20M, polyethylene glycol-4000 and linear polyethylene of low density. The pretreatment methods: hydrothermal treatment and calcinations at 800 and 11000C were used to get on more homogenous surfaces more suitable for non-extractable thin film formations. Physicochemical characteristics of this layer and its influence on the modified silica gel properties were characterized by inverse phase gas chromatography via the calculation of both surface and solubility parameters. The influence of solubility and surface parameters on probes retentions were presented and discussed.