Page 239 - Applied Pharmacognosy
P. 239
Stationary phase:
GSC:
* Adsorbents
- activated alumina
-activated charcoal
-silica gel, porous silica
- molecular sieve ( alumino silicate = zeolites )
*Room temperature
GLC :
A – Support
1-diatomaceous ( celite , kieselguhr, chromosorb p , w ,-- )
silanol group (SiOH) (active adsorptive sites)
peak tailing problem ? reason ?
238
