Dissolved oxygen, O2

Last changed: 18 February 2018

Measurements are made according to the Winkler method (reduction of O2 by Mn(II) followed by iodometric quantification of oxidised Mn). The endpoint is determined potentiometrically.

Known issues in the databases

Current method of measurement

Valid since March 2008
Method: Karlgren, L. 1961, Vattenkemiska analysmetoder (Hydrochemical Analytical Methods, In Swedish). Instruments: Metrohm Titrator Titrino 785 DMP. Metrohm electrode 6.0451.100, Pt/5-80 degrees.

Previous methods

1987-08 – 2008-02
Method: Karlgren, L. 1961, Vattenkemiska analysmetoder (Hydrochemical Analytical Methods, In Swedish).
Instrument: Metrohm Titrator Dosimat 665.

1965-01 – 1987-07
Method: Karlgren, L. 1961, Vattenkemiska analysmetoder (Hydrochemical Analytical Methods, In Swedish).


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