van deemter
Posted: Fri Oct 28, 2005 8:30 pm
by chembot
What's the optimized linear velocity and corresponding minimum H for capillary GC and packed bed GC? Trying to do some theoretical seps
optimization. Thanks!
Mike
linear velocity
Posted: Mon Oct 31, 2005 8:41 pm
by chromatographer1
optimized for separation or separation per time?
for separation using helium carrier, the general concensus is about 20cc/min linear flow.
for GLC with packed columns it is a difficult question, but I thinik most would say that 20cc/min for a packed 2mm ID column, 80cc/min for a 4mm ID column, with 5cc/min for a 1mm ID column is optimum.
Gas solid packed column chromatography is another matter altogether.