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Conditioning the column
1 Using the GC Control Module, load prep_run.m or a similar column
conditioning method with GC parameters appropriate for the column to be
used.
Make sure that the MSD interface temperature is set to off during column
conditioning.
2 With carrier gas flow through the column, check the inlet column nut for
leaks. Tighten as needed.
3 Program the oven temperature slowly (5° C per minute) to 10° C above
your highest analytical temperature.
Do not exceed the upper temperature limit recommended for the column.
4 Once the oven temperature exceeds 80° C, inject 5 uL of methanol.
5 Repeat step 4 two more times at 15 minute intervals.
6 Hold the oven temperature at the upper limit for several hours.
7 Return the GC oven temperature to a low standby value.
3 Operational Differences
Conditioning the column
71
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