6 Maintaining the Purged Packed Inlet
To Clean the Purged Packed Inlet
90 Maintaining Your GC
To Clean the Purged Packed Inlet
1 Gather the following:
• Replacement O-ring, see “Consumables and Parts for the Purged Packed Inlet” on
page 74.
• Replacement glass liner
• Replacement septum
• Solvent that will clean the type of deposits in your inlet
• Compressed, filtered, dry air or nitrogen
• Beaker
• Cleaning brushes—The FID cleaning kit (part number 9301-0985) contains appropriate
brushes
• Lint-free gloves
2 Manually set the inlet and oven temperature to < 40 °C, and wait for the inlet, oven, and
other parts you might come into contact with inside the oven, to cool before continuing.
Alternately, place the GC in maintenance mode: Maintenance > Instrument > Perform
Maintenance > Maintenance Mode > Start Maintenance.
Be careful! The oven and/or inlet may be hot enough to cause burns. If the inlet is hot, wear
heat-resistant gloves to protect your hands.
3 Remove the column.
4 Remove the septum nut and septum.
5 Remove the top insert assembly.
6 Remove the glass liner and O-ring.
7 If used, remove the adapter.
8 Ultrasonically clean the septum nut, top insert assembly, and adapter (if used) in a suitable
solvent.
9 Place a beaker in the oven under the inlet to catch the solvent.
Wear clean, lint-free gloves to prevent contamination of parts with dirt and skin oils.
10 Soak a cleaning brush with the solvent and vigorously scrub the interior walls of the inlet.
11 Blow the inside of the inlet dry with compressed air or nitrogen.
12 Install the adapter, if used. See “To Install an Adapter on the Purged Packed Inlet” on
page 86.
13 Install the glass liner and O-ring. See “To Change the Glass Liner on the Purged Packed
Inlet” on page 88.
14 Install the top insert assembly and finger-tighten.
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