28 Advanced User Guide
3 Inlets
Standard S/SL inlet
The standard split/splitless inlet is rated to 100 psi pressure at
the inlet. It is appropriate for most columns.
Recommended source pressure is 120 psi.
Split/Splitless inlet split mode overview
During a split injection, a liquid sample is introduced into a hot
inlet where it vaporizes rapidly. A small amount of the vapor
enters the column while the major portion exits from the
split/purge vent. The ratio of column flow to split vent flow is
controlled by the user. Split injections are primarily used for
high concentration samples when you can afford to lose most of
the sample out the split/purge vent. It is also used for samples
that cannot be diluted.
The split ratio is equal to the split vent flow divided by the
column flow. If the column has been configured, the desired
split ratio can be entered directly.
The pneumatics for this inlet in split mode operation are shown
in the figure below.
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