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4
Installing 7890 GC Columns
To Install a Capillary Column in the GC/MS Interface Using the Self-Tightening Column Nut
7000/7010 Series TQ GC/MS Operating Manual
83
10
Adjust the column so it extends this specified distance from the end of the
transfer line. (See
For an EI XTR or CI Source Installation,
the column extends about 1 to 2 mm.
(See
.)
For an EI HES Installation,
the column extends about 4 to 5 mm. (See
.)
Use the flashlight and magnifying loupe, if necessary, to see the end of the
column inside the analyzer chamber. Do not use your finger to feel for the
column end.
Figure 20.
Installing a capillary column in the GC/MS interface for an
EI XTR
or a
CI
source
Column extends 1-2 mm
Tip seal
GC/MS interface
Figure 21.
Installing a capillary column in the GC/MS interface for an
EI HES
Column extends 4-5 mm
Tip seal holder
GC/MS interface