Maintaining Capillary Columns 3
Maintaining Your GC 33
8 Set the column flow to the normal operating value, or set the
capillary column gas velocity to 30 cm/s.
For Split/Splitless inlets, select split mode and set the split
vent flow to 200 mL/min.
9 Purge the column with carrier flow for at least 10 minutes
before heating the oven.
10 Set the inlet temperature to 300 °C or 25 °C above the
normal operating temperature.
11 Set the column oven 25 °C above the GC method final oven
temperature to bake contaminants out of the inlet, mostly
through the split vent. Do not exceed the column
manufacturer’s maximum temperature limit.
12 Bakeout for 30 minutes.
CAUTION
Wear clean, lint-free gloves to prevent contamination of parts with
dirt and skin oils.
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