8
Maintenance
Maintaining the API Source Interface
Thermo Scientific Orbitrap Fusion Series Hardware Manual 77
2. For 30 minutes, sonicate the component in a 50:50 solution of methanol/water that
contains 20% formic acid.
3. Rinse the component thoroughly with water.
4. For 15 minutes, sonicate the component in deionized water.
5. Rinse the component with methanol.
6. For 15 minutes, sonicate the component in methanol.
7. Dry the component with nitrogen gas until it is dry.
Replace the ion transfer tube if the bore becomes corroded or blocked.
To clean the ion sweep cone
1. Soak lint-free tissues or chamois-tipped swabs in a 50:50 solution of methanol/water, and
then clean both sides of the ion sweep cone.
2. For 10 minutes, sonicate the component in either a 50:50 solution of methanol/water or
a 1% solution of Liquinox in water.
3. Rinse the component thoroughly with water.
4. Sonicate the component in water for 10 minutes.
5. Sonicate the component in methanol for 10 minutes.
6. Rinse the component with methanol.
7. Dry the component with nitrogen gas to make sure that all the solvent evaporates.
8. Using a magnification device, inspect the component for any residual lint or particulates.
After you clean and reinstall these components, turn on the nonvacuum system voltages by
placing the mass spectrometer's electronics service switch in the Operating Mode (up)
position.
CAUTION When you reinstall the ion transfer tube into the heater block, take these
precautions:
• Put on a new pair of lint- and powder-free gloves.
• Verify that everything is properly aligned to prevent stripping the threads on the ion
transfer tube.
• Do not bend the ion transfer tube. Rotate it as you insert it.
Tip If you successfully unblocked the ion transfer tube, check that the Source Pressure
reading has increased to a normal value (approximately 1.5–2.5 Torr). If trying this
method does not clear the blockage, replace the ion transfer tube.
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