Inlets 3
Advanced Operation Manual 123
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.
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