German standard methods for the examination of water, waste water and sludge; general information (group A); sampling of water from mineral springs and spas (A 18)
Edition 1991-05

Water quality; determination of dissolved oxygen; iodometric method (ISO 5813:1983); german version EN 25813:1992
Edition 1993-01

German standard methods for the examination of water, waste water and sludge; cations (group E); determination of cobalt by atomic absorption spectrometry (AAS) (E 24)
Edition 1993-03

German standard methods for the examination of water, waste water and sludge - Cations (group E) - Part 26: Determination of thallium by atomic absorption spectrometry (AAS) using electrothermal atomisation (E 26)
Edition 1997-07

German standard methods for the examination of water, waste water and sludge - Jointly determinable substances (group F) - Part 17: Determination of selected nitroaromatic compounds by gas-liquid chromatography (F 17)
Edition 1999-02

Water quality; determination of nitrite; molecular absorption spectrometric method (ISO 6777:1984); german version EN 26777:1993
Edition 1993-04

German standard methods for the examination of water, waste water and sludge; bio-assays (group L); surfactant biodegradation and elimination test for simulation of municipal waste water treatment plants (L 26)
Edition 1994-05

Continuous conveyors - Belt conveyors for loose bulk materials - Basis for calculation and dimensioning
Edition 2011-12

Non-destructive testing - Qualification of NDT personnel in Civil Engineering (NDT-CE)
Edition 2022-09

Ventilation and air conditioning - Part 4: Ventilation in buildings and rooms of health care
Edition 2018-09