2 Installing 7890/7820/6890/6850 GC Columns
5975/5977 Series MSD Operating Manual 33
Procedure
1 Cool the oven and inlet to room temperature.
2 Wearing clean gloves, press the column through the septum (this takes a bit
of pressure). Then slide the column nut and conditioned ferrule onto the free
end of the column. (See Figure 3.) The tapered end of the ferrule should point
away from the column nut.
3 Use the column cutter to score the column 2 cm or more from the end.
4 While holding the column, break the column end off at the score.
5 Inspect the end for jagged edges or burrs. If the break is not clean and even,
repeat steps 3 and 4.
6 Wipe the outside of the free end of the column with a lint-free cloth
moistened with methanol.
Always wear clean gloves while handling any parts that go inside the GC or
analyzer chambers.
Figure 3. Preparing a capillary column for installation
Capillary column
Column cutter
Ferrule, taper up
Inlet column nut
Septum
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