German standard methods for the examination of water, waste water and sludge; cations (group E); determination of copper by atomic absorption spectrometry (AAS) (E 7)
Edition 1991-09

German standard methods for the examination of water, waste water and sludge; cations (group E); determination of nickel by atomic absorption spectrometry (AAS) (E 11)
Edition 1991-09

German standard methods for the examination of water, waste water and sludge - Sub-animal testing (group T) - Part 1: Determination of cholinesterase inhibiting organophosphorus and carbamate pesticides (cholinesterase inhibition test) (T 1)
Edition 1995-02

German standard methods for the examination of water, waste water and sludge; parameters characterizing effects and substances (group H); determination of the chemical oxygen demand (COD), ranging from 5 to 50 mg/l (H 44)
Edition 1992-05

Expression of performance of electrochemical analyzers - Part 5: Oxidation-reduction potential or redox potential (IEC 60746-5:1992)
Edition 1996-07

Water quality; detection and enumeration of the spores of sulfite-reducing anaerobes (clostridia); part 2: method by membrane filtration (ISO 6461-2:1986); german version EN 26461-2:1993
Edition 1993-04

Agitators and baffles for agitator vessels; types, terms and main dimensions
Edition 1992-09

Textile fibres; forms of fibres and manufacturing
Edition 1990-10

PTFE envelope gaskets for glass lined agitator vessels
Edition 1992-01

Flanged couplings for carbon and stainless steel agitator shafts; coupling in the agitator vessel; dimensions
Edition 1992-02