Restrictor
6. Remove the O-ring from the restrictor.
7. Clean the components (see Cleaning the source components (Page 38)).
Note: In addition to the ion block and restrictor, you can use the same procedure to clean
the sample cone.
3.9.2 Cleaning the source components
Required tools and materials
• Chemical-resistant, powder-free gloves
• Appropriately sized glass vessels in which to completely immerse components when
cleaning. Use only glassware not previously cleaned with surfactants.
• HPLC-grade (or better) methanol
• HPLC-grade (or better) water
• Formic acid
• Ultrasonic bath
• Source of oil-free, inert gas (nitrogen or argon) for drying (air-drying optional)
• Wash bottle containing HPLC-grade (or better) 1:1 methanol/water
• Large beaker
Warning: To avoid personal contamination with biologically hazardous or toxic compounds,
wear clean, chemical-resistant, powder-free gloves when performing this procedure.
Warning: To avoid injury when working with formic acid, which is extremely corrosive and toxic,
take extreme care handling it, and use a fume hood and suitable protective equipment.
To clean the source components:
1. Remove any O-rings from the source components.
Important: If an O-ring is visibly damaged, replace it.
2. Immerse the ion block, restrictor, and sample cone in separate glass vessels containing 1:1
methanol/water.
Note: Do not clean the consumable components such as the aperture disc or O-rings.
Instead, replace these consumables when performing general maintenance, when the
August 20, 2021, 715005003 Ver. 04 (Previously released as Revision C)
Page 38
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