156 Maintaining Your GC
9 Maintaining the PTV Inlet
6
Score the column using a glass scribing tool. The score
must be square to ensure a clean break.
7 Break off the column end by supporting it against the
column cutter opposite the scribe. Inspect the end with a
magnifying loupe to make certain that there are no burrs
or jagged edges.
8 Wipe the column walls with a tissue dampened with
isopropanol to remove fingerprints and dust.
9 Position the column so it extends 17 mm above the end of
the ferrule. Mark the column behind the ferrule with
typewriter correction fluid or a marker. Slide the nut over
the column.
10 Insert the column into the adapter and finger- tighten the
column nut. Looking through the slot in the nut, adjust
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