The Gc/Ms Interface - Agilent Technologies 7200 Operation Manual

The GC/MS Interface

See also
WARNI NG
Operation Manual

The GC/MS interface

for the capillary column. The interface is bolted onto the right
side of the front analyzer chamber and has an O-ring seal. It has
a protective insulated cover that should be left in place.
One end of the GC/MS interface passes through the side of the
gas chromatograph and extends into the GC oven. This end is
threaded to allow connection of the column with a nut and
ferrule. The other end of the interface fits into the ion source.
The last 1 to 2 mm of the capillary column extend past the end
of the guide tube and into the ionization chamber. When
changing the removable ion source, the interface is
automatically retracted from the ion source by the MassHunter
software. This allows the ion source to slide freely in and out of
the analyzer chamber.
The GC/MS interface is heated by an electric cartridge heater.
Normally, the heater is powered and controlled by the Thermal
Aux #2 heated zone of the GC. The interface temperature can be
set from the MassHunter Workstation or from the gas
chromatograph keypad. A sensor (thermocouple) in the
interface monitors the temperature.
The GC/MS interface generally operates in the 250 to 350 C
range. Subject to that restriction, the interface temperature
should be slightly higher than the maximum GC oven
temperature, but never higher than the maximum column
temperature.
"To Install a Capillary Column in the GC/MS Interface"
page 35.
The GC/MS interface operates at high temperatures. If you touch it
when it is hot, it will burn you.
Operating in Electron Impact (EI) Mode
The GC/MS Interface
(Figure 10) is a heated conduit into the MS
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on
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