Xylem ISE Electrodes CN 60 - Handbuch (Seite 13)

13
Commissioning
Danger
When dealing with acidic solutions that contain
hydrocyanic acid, there is danger of poisoning by
released hydrocyanic acid. You must add the alkaline
reagent MZ/NH3/CN to each sample to increase the pH
value of the sample to > 10 and thus prevent the
hydrocyanic acid from being released. Only perform
cyanide measurements in acidic media under a
functioning fume hood.
The combination electrode is now ready to measure.
Always leave the refilling opening of the reference
electrode open while measuring.
Note Using a magnetic stirrer may cause interferences. If the
measured values strongly fluctuate we recommend to switch
off the magnetic stirrer while measuring.