Perkin-Elmer TITAN MPS, User Manual

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102
Maintenance
Oven Chamber
The oven should be wiped out with a moist cloth at regular intervals as well as
whenever a rupture disc vents. All relevant safety measures should be observed for
the acids used. Careful attention should be used when dealing with hydrofluoric
acid.
Allow the oven to thoroughly dry before again using it!
Display
Use only a dry cloth to wipe off the display.
PFA Gas Containment Manifold Exhaust Tube
After a rupture disc vents the PFA exhaust tube will be contaminated with acid. To
disassemble the tube unscrew the fittings on both ends. Flush the tube with water
and dry with pressurized air. Reattach the tube using the screw fittings, ensuring a
tight seal.
Vessels
Since the vessels exhibit practically no memory effects it is generally sufficient to
thoroughly rinse out the vessels with distilled water after each digestion procedure
that results in complete sample digestion.
If discoloration is noted or if carry over is suspected, the vessels are cleaned by a
digestion using clean acid with no sample. The Application Notebook has the
vessel cleaning method included.
When running samples that have large differences in analyte concentrations it is
advisable to perform a cleaning digestion prior to of the next set of digestions. (for
example when the analyte concentration changes from % to ppm, ppb, or b ppb).
Cleaning Methods
The necessary cleaning method depends on the degree of the previously performed
digestion and its further use.