Soil quality. Determination of potential nitrification and inhibition of nitrification. Rapid test by ammonium oxidation
Edition 2020-05-27

Water quality - Toxicity test for assessing the inhibition of nitrification of activated sludge microorganisms (ISO 9509:2006)
Edition 2007-03-21

Soil quality - Biological methods - Determination of nitrogen mineralization and nitrification in soils and the influence of chemicals on these processes (ISO 14238:2012) (Endorsed by AENOR in January of 2014.)
Edition 2014-01-01

Soil quality - Determination of potential nitrification and inhibition of nitrification - Rapid test by ammonium oxidation (ISO 15685:2012) (Endorsed by Asociación Española de Normalización in June of 2020.)
Edition 2020-06-01

Fertilizers - Determination of nitrification inhibitor DMPSA in fertilizers - Method using high-performance liquid chromatography (HPLC)
Edition 2019-07-03

Soil quality - Determination of potential nitrification and inhibition of nitrification - Rapid test by ammonium oxidation (ISO 15685:2012); German version EN ISO 15685:2020
Edition 2021-02

Water quality - Toxicity test for assessing the inhibition of nitrification of activated sludge microorganisms (ISO 9509:2006); German version EN ISO 9509:2006
Edition 2006-10

Fertilizers - Determination of nitrification inhibitor DMPSA in fertilizers - Method using high-performance liquid chromatography (HPLC); German version EN 17090:2018
Edition 2019-01

Soil quality - Biological methods - Determination of nitrogen mineralization and nitrification in soils and the influence of chemicals on these processes (ISO 14238:2012); German version EN ISO 14238:2013
Edition 2014-03

Water quality - Test for inhibition of oxygen consumption by activated sludge for carbonaceous and ammonium oxidation (ISO 8192:2007); German version EN ISO 8192:2007
Edition 2007-05