To Bakeout Contaminants From The Split/Splitless Inlet - Agilent Technologies 5975T LTM GC Operation Manual

To Bakeout Contaminants from the Split/Splitless Inlet

This procedure is used to bakeout inlet contaminants mostly through the split
vent line.
Materials needed
• Gloves, clean, lint-free
• Pliers, long-nose (8710-1094)
• Guard column
• Column nut (5020-8292)
• Ferrules (Vespel)
Procedure
1 Put the inlet into split mode.
2 Set the column flow to the normal operating value, or set the capillary
3 Set the inlet split vent flow to 200 mL/min.
4 Purge the column with carrier flow for at least 10 minutes before heating
5 Set the inlet temperature to 300 °C or 25 °C above the normal operating
6 Set the guard column enclosure temperature to the column manufacturer's
7 Set the LTM column to 25 °C above the method final column temperature to
8 Hold these system temperatures and flows for 30 minutes.
9 Restore the analytical method.
5975T LTM GC/MSD Operation Manual
• Large (8650-0030)
• Small (8650-0029)
• 0.40-mm id, for 0.25-mm id columns (5181-3323)
• 0.5-mm id, for 0.32-mm id columns (5062-3514)
column gas velocity to 30 cm/s.
the LTM column.
temperature.
maximum column temperature.
bake contaminants from the column. Do not exceed the column
manufacturer's maximum temperature limit.
General Maintenance
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