User guide

216 Advanced User Guide
8 Inlets
These results were compared with a splitless analysis of the
same sample, which should produce 100% recovery of all
analytes. The data showed that, under these conditions,
compounds above C
20
were completely recovered and that the
recovery was independent of injection size. Compounds lower than
C
20
were partially vented with the solvent.
Possible adjustments
Depending on what you are trying to accomplish, you have a
number of possible adjustments available.
To eliminate more solvent
• Increase the vent end time, inlet initial time, and purge time.
This will not affect analytes that are quantitatively trapped
but will eliminate more of the solvent peak.
• Increase the vent flow to sweep the liner more rapidly with
the same inlet timing. Increasing vent flow raises vent
pressure if it is set to 0. This puts more solvent onto the
column.
C20