Ammonium, NH4-N

Last changed: 19 February 2018

Known issues in the databases

Current method of measurement (discrete analysis, photometric)

Valid since June 2014
Method: ISO 15923-1:2013
Instrument: Gallery

Previous methods

2000-01 – 2014-05
Method: Phenate method according to Bran & Luebbe Method No G-171-96 Rev. 1
Instruments: Bran & Luebbe Autoanalyzer 3. NB: No conservation of water samples.

1979-10 – 1999-12
Method: Indophenol method according to Swedish Standard SIS 02 81 34. NB: No conservation of water samples.

1965-01 – 1978-12
Method: Prochazkova, L.: Anal. Chem., 1964, 36, 956. Fotometrisk bestämmning av NH4-N med bispyrazolon (Photometric determination of NH4-N with bispyrazolone, in Swedish). NB: Water samples conserved with HgCl2.


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