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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
2
Collect the following parts to be cleaned for an EI XTR source: (See
•
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.