2 Installing 7890/7820/6890/6850 GC Columns
5975/5977 Series MSD Operating Manual 35
To Condition a Capillary Column
Materials needed
• Carrier gas, (99.9995% pure or better)
• Wrench, open-end, 1/4-inch and 5/16-inch (8710-0510)
Procedure
1 Install the column in the GC inlet. (See“To Install a Capillary Column in a
Split/Splitless Inlet” on page 32.)
2 Set a minimum velocity of 30 cm/s, or as recommended by the column
manufacturer. Allow the carrier gas to flow through the column at room
temperature for 15 to 30 minutes to remove air.
3 Program the oven from room temperature to the maximum temperature
limit for the column.
4 Increase the temperature at a rate of 10 to 15 °C/min.
5 Hold at the maximum temperature for 30 minutes.
6 Set the GC oven temperature to 30 °C, and wait for the GC to become ready.
7 Attach the column to the GC interface. (See“To Install a Capillary Column in
the GC/MS Interface Using the Self-Tightening Column Nut” on page 36.)
Do not condition your capillary column with hydrogen. Hydrogen accumulation
in the GC oven can result in an explosion. If you plan to use hydrogen as your
carrier gas, first condition the column with ultrapure (99.999% or better) inert
gas such as helium, nitrogen, or argon.
The GC operates under high temperatures. Do not touch any GC parts unless
you are certain they are cool.
Never exceed the maximum column temperature, either in the GC/MS
interface, the GC oven, or the inlet.
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