• 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
To clean the sample cone and cone gas nozzle:
Warning: To avoid personal contamination with biohazardous 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 maintain the source components:
1. Remove any O-rings from the source components and replace the calibration pin at the top
of the ion block.
Important: If the O-ring is visibly damaged, replace it.
Figure 3–7: Ion block and calibration pin
Calibration pin
Ion block
2. Immerse the sample cone, entrance-aperture carrier, and ion block in separate glass
vessels containing 1:1 methanol/water.
June 15, 2017, 715003956 Rev. F
Page 37
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