TypeofContamination CleaningAgent SoakingTime
Alkaline coatings
Apera Electrode Cleaning
Solution (SKU: AI1166)
5 – 10 minutes
Acidic coatings 0.1M NaOH solution 5 – 10 minutes
Sulde-containing
substances
Thiourea
30– 60 minutes, leave until
junction discoloration
disappears.
Unknown substances
Apera Electrode Cleaning
Solution (SKU: AI1166)
30 – 60 minutes
Use a soft brush to help thoroughly clean o the contaminants. After the cleaning
procedure, the pH electrode should always be soaked in 3M KCl solution for 12-24 hours
for rehydration. A re-calibration is also necessary before a new pH measurement.
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