Chemical oxygen demand, CODMn

Known issues with the parameter and/or important method changes

Since January 2019 are the results reported as COD_Mn i.e. in the unit mg O/l.

Until December 2018 was only the amount of oxidant used (permanganattal) is given in our database. A conversion between the amount and COD_Mn is done according to:

Amount of oxidant used (permanganattal) = 3.95 * COD_Mn

Current method of measurement

Valid since March 2008
Method: Fd. SS 02 81 18, utg1, mod
Instruments: Metrohm Titrator Titrino 785
Note: Water samples conserved with H₂SO₄. Until December 2018 were the results reported as amount of oxidant (permanganattal). Since January 2019 are the results reported as COD_Mn i.e. in the unit mg O/l.

Previous methods

1981 01 - 2008 02
Method:SS 28118-1 mod. - Vattenundersökningar - Bestämning av oxygenförbrukning hos vatten - CODMn oxidation med permanganat (the same method as for the period 1968-1980, but it was turned into a Swedish standard 1981-05-20).
Instruments: Metrohm Titrator Dosimat 665
Note: Water samples conserved with HgCl₂ until 1996. From 1997 were the water samples conserved with H₂SO₄.

1968 01 - 1980 12
Method: Scandinavian Pulp, Paper and Board Testing Committee Scan-W1:66. Bouveng, H-O. & Olsson, E. Permanganate value of waters: a modified procedure, Skogsindustriernas Vattenlaboratorium, Stockholm, Sweden.
Note: Water samples conserved with HgCl₂.

1965 01 - 1967 12
Method: Deutsche Einheitsverfahren 3nr Wasser, Abwasser und Schlammuntersuchung, Verlag Chemie, Gmbtt Weinheim 1960.
Note: Water samples conserved with HgCl₂.