A-96.250.211 / 171121
AMI Sodium P
Maintenance
63
Mix the etching
solution
WARNING
Health hazard
Diluted acidic fluoride solutions are harmful and irritating. Harmful
if ingested, irritates skin and eyes. Contains less than 0.5% hy
-
drofluoric acid. Contains less than 1% acetic acid. For laboratory
use only.
Short contact with skin is harmless, nevertheless wash with
lots of water.
Note:
Only use the original etching solution from SWAN.
The etching solution is delivered in two bottles, one containing the
acidic solvent, the other containing the fluoride salt.
Dissolve the salt in the solvent before use and mark the date of
mixing.
Note:
Once the fluoride salt is dissolved, the life time of the
solution is limited to 6 months.
Cleaning and
etching
1
Remove adhered iron deposits by wiping the electrode gently
with a paper tissue.
2
Rinse the electrode with distilled water.
3
Insert the electrode for 2 minutes into the etching solution.
4
Rinse the electrode with distilled water again.
Do not dry the sensing glass bulb.
Install
See
Installing the Sodium Electrode, p. 25
Replace the
sodium elec
-
trode
1
Proceed according to
Remove the sodium electrode, p. 62
.
2
Insert the new electrode for 2 minutes into the etching solution.
3
Rinse the electrode with distilled water again.
Do not dry the sensing glass bulb.
4
Install the sodium electrode, see
Installing the Sodium Electrode,
.
