15
Addendum 1: Preparation of the zero oxygen solution
Dissolve 500mg of sodium sulfate (Na
2
SO
3
) reagent and a small amount of cobalt(II) chloride hexahydrate (CoCl
2
•
6H
2
O) in the 250mL distilled water, mix the
solution until the reagent is completely dissolved.
Addendum 2: Preparation of the air-saturated water
Use an air-pump to blow air into distilled water at least 60 minutes, while stirring the solution.
DO901 Portable Dissolved Oxygen Meter
Addendum 3 : Sofware instruction ( see next page)
