Waters Xevo TQ MS Operator's, Overview And Maintenance Manual page 116

4 Maintenance Procedures
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 extraction cone by immersing
it in a glass vessel containing methanol and then placing the vessel
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.
7. Inspect each component for persisting contamination. If contamination
is present, dispose of the component, and obtain a new one before
reassembling the sampling cone assembly.
116 February 11, 2013, 71500130002 Rev. D
To avoid recontaminating the components, wear clean,