Thermal and Hydrothermal Treatment of Silica Gels as Solid Stationary Phases in Gas Chromatography

Table 1

List of the studied surface modified silica gels obtained by different techniques.

Sample no.	Notation	Treatment
1	Si	Acid-washed silica gel (60–80 mesh)
2	SiC500	Silica gel calcined at 500°C
3	SiC1000	Silica gel calcined at 1000°C
4	SiHT	Hydrothermally treated silica gel
5	SiCHT	Calcined silica gel followed by hydrothermal treatment