Waters Xevo TQD Overview And Maintenance Manual page 143

Warning:
toxic materials, and to avoid spreading contamination to
uncontaminated surfaces, wear clean, chemical-resistant,
powder-free gloves when handling the differential pumping
aperture, and throughout this procedure.
To clean the differential aperture:
1. Use the glass-fiber pen to remove gross contamination from the
differential aperture by gentle abrasion.
2. Using 1:1 methanol/water from the wash bottle, flush the differential
aperture.
Doing so removes residual fibers displaced from the
Rationale:
glass-fiber pen.
3. Completely immerse the differential aperture in a glass vessel
containing 1:1 methanol/water.
Requirement:
using the glass-fiber pen, use 45:45:10 methanol/water/formic acid.
4. Place the vessel in the ultrasonic bath for 30 minutes.
5. If you used formic acid in the cleaning solution, rinse the differential
aperture by immersing it in a glass vessel containing water and then
place the vessel in the ultrasonic bath for 20 minutes
Notice:
clean, chemical-resistant, powder-free gloves for the following
step.
6. Carefully remove the differential aperture from the vessel, and blow it
dry using inert, oil-free gas.
To avoid personal contamination with biohazards or
If the differential aperture is still contaminated after
To avoid recontaminating the differential aperture, wear
Cleaning the ion guide assembly
.
March 14, 2014, 715004387 Rev. B 143