TOPwave
Operating
33
6.2
Performing a Digestion Procedure
WARNING
Use only digestion vessels and spare parts authorized Analytik Jena for use with the
TOPwave. These can be obtained either from your local dealer or directly from Analytik
Jena.
Always wear safety glasses/goggles and protective gloves when working with the pres-
sure vessels!
Note any changes in the appearance of the pressure vessel which could indicate possible
material fatigue, e.g., deformation of the vessel, difficulty screwing on lids, etc. even
when the vessel is cold and not under pressure. All such vessels should be immediately
returned to Analytik Jena for inspection.
Never attempt to use force to open the vessels. Never use tools to open the vessels!
The pressure vessels are equipped with a rupture disc which produces a spontaneous
pressure release upwards through the screw-on tube connections in case of excessive
vessel pressure. In some cases, such a spontaneous pressure release may occur after the
vessel has been removed from the microwave oven.
Hot gases and vapors may be released from the digestion vessel when it is opened! Al-
ways make sure the vent opening on pressure vessels faces away from both yourself and
other individuals!
Only open the digestion vessel under a fume hood or other exhaust system. Particular
care is required when working with hydrofluoric acid (HF). Observe all relevant data
sheets and safety instructions!
Never use more than one rupture disc per vessel!
Only use rupture discs which are designed for the respective vessel!
WARNING
Always wear safety glasses/goggles and protective gloves during work which may in-
volve contact with chemicals, that is, when working with acids, pressure vessels, during
cleaning, etc.
WARNING
Never operate the microwave without supervision, e.g. overnight.
CAUTION
Renew the vessels after around 10,000 digestions to maintain reliable operating condi-
tions and to prevent negative influences on your analysis results (e.g. memory effects
etc.). Analytik Jena includes its digestion vessels in the warranty coverage. Nevertheless
all of the vessels are subject to a certain aging process, which also depends on the type
and frequency of the application. Typically the service life is 10,000 digestion processes
or at least 3 years.