92 Advanced Operation Manual
3 Inlets
About the Cool On-Column Inlet
This inlet introduces liquid sample directly onto a capillary
column. To do this, both the inlet and the oven must be cool
at injection, either at or below the boiling point of the
solvent.
Because the sample does not vaporize immediately in the
inlet, problems with sample discrimination and sample
alteration are minimized. If done properly, cool- on column
injection also provides accurate and precise results.
You can operate the inlet in track oven mode, where the
inlet temperature follows the column oven, or you can
program up to three temperature ramps. A cryogenic cooling
option that uses liquid CO
2
or N
2
from the oven cryogenic
system can reach sub- ambient temperatures.
Valve
Frit Frit
Valve
EPC Module
Cool on Column
Inlet Weldment
PS = Pressure Sensor
PS
PS
Carrier Supply
80 PSI
Septum Purge
Column
Septum
Column Adapter
Ferrule
Column Nut
Column
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