About The Cool On-Column Inlet - Agilent Technologies 7890 Series Advanced Operation Manual

3
Inlets

About the Cool On-Column Inlet

Carrier Supply
80 PSI
Frit
Valve
PS
Ferrule
PS = Pressure Sensor
92
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
system can reach sub- ambient temperatures.
EPC Module
Valve
Septum
Cool on Column
Inlet Weldment
Column Adapter
Column Nut
Column
Column
or N from the oven cryogenic
2 2
Septum Purge
Frit
PS
Advanced Operation Manual