88 Advanced Operation Manual
3 Inlets
About the Packed Column Inlet
This inlet is also known as the purged packed inlet (PP). It
is used with packed columns when high- efficiency
separations are not required. It can also be used with
wide- bore capillary columns, if flows greater than
10 mL/min are acceptable.
If the columns are not defined (packed columns and
undefined capillary columns), the inlet is usually
flow- controlled. If capillary columns are used and the
columns in the flow path are defined, the inlet is normally
pressure- controlled but can be put into the flow control
mode.
The figure shows the inlet in the capillary column mode,
with the column defined and the flow controlled by
pressure.
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