4 Installing 7890 GC Columns
To Install a Capillary Column in a Split/Splitless Inlet
5977B Series MSD Operating Manual 81
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 19.) 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.
7 Position the column so it extends 4 to 6 mm past the end of the ferrule. (See
Figure 20.)
Figure 19. Preparing a capillary column for installation
Capillary column
Column cutter
Ferrule, taper up
Inlet column nut
Septum
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