Hardware manual

Maintenance 4
Agilent 7500 Series ICP-MS Hardware Manual 4-113
Cleaning the Reaction Cell Lenses
The parts of the Reaction cell that need to be cleaned are the Cell Entrance,
Cell Focus, Exit, QP Focus, and Plate Bias Lens. Remove the O- rings from the
Cell Entrance and QP Focus lenses when cleaning.
It is possible to clean the lenses separately, but it is more efficient to clean
them together.
There is normally no need to clean the spacers and screws. Be careful not to
touch the spacers and screws with your bare hands.
Perform the following procedure when cleaning the lenses.
1 Polish with polishing paper (#400).
The polishing paper can be used either wet or dry. Wet polishing paper is
easier to use when polishing the surfaces.
Polish the inner and outer surfaces of the lenses. Be careful not to deform
the inside of the lens. Deformation will affect instrument performance. Pay
particular attention to the hole in the plate bias lens as this is where the ion
beam passes through.
2 Polish with polishing paper (#1200).
3 Polish the lenses with an alumina powder slurry.
Use a mixture of alumia powder and pure water as a polishing solution.
Dip a cotton swab in the polishing solution and clean the inner and outer
surfaces of the lenses. Pay particular attention to the holes.
4 Rinse with pure water after cleaning.
5 Ultrasonic the lenses in a 2% detergent solution for 5 minutes after
cleaning.
6 Rinse with pure water.
7 Ultrasonic the lenses in pure water for an additional 5 minutes.
8 Dry on a clean surface.
Allow the lenses to air dry, do not wipe.
WARNING
Do not clean with methanol or acetone. Using these in an ultrasonic bath presents a
fire hazard.