Waters Xevo G2-XS QTof Overview And Maintenance Manual page 134

6 Maintenance Procedures
1. If the sample cone contains debris, place a drop of formic acid on its
orifice.
2. Immerse the sample cone, cone gas nozzle, and cone gas nozzle handle in
separate glass vessels containing 1:1 methanol/water.
If the components are obviously contaminated, use 45:45:10
Tip:
methanol/water/formic acid.
3. Place the vessels in the ultrasonic bath for 30 minutes.
4. If you used formic acid in the cleaning solution, do as follows:
a. Rinse the components by immersing them in separate glass vessels
containing water and then placing the vessels in the ultrasonic bath
for 20 minutes.
b. Remove any residual water from the components by immersing
them in separate glass vessels containing methanol and then
placing the vessels in the ultrasonic bath for 10 minutes.
Notice:
chemical-resistant, powder-free gloves for the rest of this
procedure.
5. Carefully remove the components from the vessels, and blow dry them
with inert, oil-free gas.
6. Inspect each component for persisting contamination. If contamination
is present, do as follows:
a. Use the wash bottle containing 1:1 methanol/water to rinse the
component over the large beaker.
b. Blow dry the component with inert, oil-free gas.
7. Inspect each component for persisting contamination.
Requirement:
contamination is still present, dispose of the component, according to
local environmental regulations, and obtain a new one before
reassembling the sampling cone assembly.
134 April 2, 2015, 715004496 Rev. B
To avoid recontaminating the components, wear clean,
To avoid contaminating uncontaminated
Warning:
surfaces with biologically hazardous, toxic, or corrosive
materials, dispose of components according to local
environmental regulations.
If contamination is present, clean the component again. If