pyrolysis gasoline on lowox column

[jman01]

I am trying to figure out if running pyrolysis gasoline on a lowox column will cause any damage. I am running it on an agilent 7890A with a capilary column attached to a boiling column. I am kind of new at working on this type of thing, so any help is greatly appreciated.

[larkl]

It probably won't "hurt" anything. I would be cautious about co-elutions of the heavy aromatics/unsaturates with the oxygenates. If the boiling point column is set up to work as a "stripper" column, allowing backflush of the heavies after the oxygenates have eluted to the Lowox column, that'll help.

[jdezeeuw]

Lowox is a column based on adsorption chromatography. It has very low kapacity (loadability)meaning it will overload very fast. It works nicely for oxygenates in a volatile hydrocarbon matrix, but if higher hydrocarbons (and aromatics)are present, large amounts may impact the separation.

thats why often a precolumn (PDMS) is used to make sure the higher boilers are switched back

the column by itself can take these matrices as long as all peaks are eluting.