Fruit and vegetable juices - Enzymatic determination of D-isocitric acid content - NADPH spectrometric method; German version EN 1139:1994
Edition 1994-12

Water quality - Determination of dissolved bromate - Method using ion chromatography (IC) and post column reaction (PCR) (ISO 11206:2011); German version EN ISO 11206:2013
Edition 2013-05

Milk and milk products - Determination of nitrate content - Method by enzymatic reduction and molecular-absorption spectrometry after Griess reaction (ISO 20541:2008); German version EN ISO 20541:2008
Edition 2008-12

German standard methods for the examination of water, waste water and sludge; bio-assays (group L); determining the tolerance of green algae to the toxicity of waste water (Scenedesmus chlorophyll fluorescence test) by way of dilution series (L 33)
Edition 1991-03

Methods of test for masonry units - Part 5: Determination of the active soluble salts content of clay masonry units; German version EN 772-5:2016+AC:2017
Edition 2018-12

Water quality - Determination of selected parameters by discrete analysis systems - Part 1: Ammonium, nitrate, nitrite, chloride, orthophosphate, sulfate and silicate with photometric detection (ISO 15923-1:2013)
Edition 2014-07

Soil quality - Determination of nitrate nitrogen, ammonium nitrogen and total soluble nitrogen in air-dry soils using calcium chloride solution as extractant (ISO 14255:1998)
Edition 1998-11

Haemostaseology - Reference method for the Von Willebrand Factor multimers; Text in German and English
Edition 2024-04

Haematology - Determination of haemoglobin concentration in blood - Reference method; Text in German and English
Edition 2021-09

Foodstuffs - Determination of sulfite - Part 2: Enzymatic method; German version EN 1988-2:1998
Edition 1998-05