YSI ScienceLine -- pHT - G - Manual (Page 9)

T 814244 04/2014 9
ScienceLine Wear parts and accessories
Cleaning Remove water-soluble contamination by rinsing with deionized water. Re-
move other contamination as follows:
Contamination Cleaning procedure
Fat and oil Rinse with water containing household
washing-up liquid
Lime and hydroxide deposits Rinse with citric acid (10 % by weight)
Proteins Immerse in pepsin cleaning solution PEP/pH
for approx. 1 hour.
Note: Make sure the level of the reference
electrolyte is above that of the cleaning
solution.
Note
Hydrofluoric acid, hot phosphoric acid and strong alkaline solutions destroy
the glass membrane.
After cleaning Rinse the combination electrode with deionized water and condition it in
reference electrolyte solution (KCl 3 mol/l, Ag
+
free) for at least 1 hour. Then
recalibrate the combination electrode.
Wear parts and accessories
Description Model Order no.
Reference electrolyte solution 250 ml
(KCl 3 mol/l, Ag
+
free)
KCl-250 109 705Y