Waters Xevo TQ MS, Operator And Maintenance Manual, Page: 78 / 184

4-30 Maintenance Procedures
5. If the O-ring shows signs of deterioration or damage, dispose of it in
accordance with local environmental regulations.
6. Unscrew and remove the PEEK cone gas nozzle handle from the cone
gas nozzle.
Cleaning the sample cone and cone gas nozzle
Required 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:
The O-ring can be contaminated with
biohazardous and/or toxic materials. Dispose of it according
to local environmental regulations.