7 General Maintenance
To Clean the EI XTR Source
174 7000/7010 Series TQ GC/MS Operating Manual
To Clean the EI XTR Source
Materials needed
• Abrasive paper (5061-5896)
• Alumina abrasive powder, 100 g (393706201)
• 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
Preparation
1 Disassemble the EI XTR source. (See “To Disassemble the EI XTR
Source” on page 168.)
2 Collect the following parts to be cleaned for an EI XTR source: (See Figure 55
on page 175.)
• Repeller
• Repeller block insert
• Entrance lens
• Ion focus lens
• Extractor lens
• Source body
These are the parts that contact the sample or ion beam. The other parts
normally should not require cleaning.
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