IKA AOD 1 - Manual (Page 61)

6 Carrying out Decomposition Tests
IKA  -WERKE AOD 1 Ver. 01 01.03
Page 6-8
6.8 Cleaning the decomposition vessel
If there is a suspicion that a sample, or the residues or gaseous products of
combustion could present a health hazard, then protective clothing (e.g.
gloves, breathing mask) must be worn. Combustion residues which are a haz-
ard to health or the environment must be disposed of as hazardous waste. We
refer you explicitly to the valid regulations.
For accurate results, it is absolutely essential that the decomposition vessel is clean
and dry. After every test, the inner walls of the vessel, the internal fittings (mount-
ings, electrodes etc.) and the combustion crucible (internally and externally!) must
be thoroughly cleaned.
The inner walls of the vessel and internal parts should be cleaned with distilled wa-
ter or dilute nitric acid, and then carefully wiped out with an absorbent lint-free cloth.
If the decomposition vessel cannot be properly cleaned using the measures de-
scribed (e.g. due to burning, pitting, corrosion etc.), do not attempt to clean it me-
chanically. In such cases, contact our Technical Service!
Combustion residues in the crucible, e.g. carbon or ash, must also be wiped off
carefully with an absorptive, lint-free cloth.
Inner walls of
vessel
Crucible