122 Operation Manual
6 General Maintenance
To Clean the Ion Source
To Clean the Ion Source
Frequency of cleaning
Because the CI ion source operates at much higher pressures
than the EI ion source, it will probably require more frequent
cleaning than the EI ion source. Cleaning of the source is not a
scheduled maintenance procedure. The source should be
cleaned whenever there are performance anomalies that are
associated with a dirty ion source. See the 7200 Q-TOF GC/MS
Troubleshooting and Maintenance Manual for symptoms that
indicate a dirty ion source.
Visual appearance is not an accurate guide to cleanliness of
the CI ion source. The CI ion source can show little or no
discoloration yet still need cleaning. Let analytical
performance be your guide.
Materials needed
• Abrasive paper (5061-5896)
• Alumina abrasive powder (8660-0791)
• Aluminum foil, clean
• Cloths, clean (05980-60051)
• Cotton swabs (5080-5400)
• Glass beakers, 500 mL
• Gloves, clean, lint-free
• Large (8650-0030)
• Small (8650-0029)
• Solvents
• Acetone, reagent grade
• Methanol, reagent grade
• Methylene chloride, reagent grade
• Ultrasonic bath
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