Waters Xevo G2 QTof Operator's, Overview And Maintenance Manual page 111

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.
Caution:
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.
Warning:
biohazardous and/or toxic materials. Dispose of them
according to local environmental regulations.
7. Inspect each component for persisting contamination.
If contamination is present, clean the component again. If
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.
To avoid recontaminating the components, wear clean,
The components can be contaminated with
Cleaning the sampling cone assembly 5-35