Water quality - Determination of free chlorine and total chlorine - Part 3: Iodometric titration method for the determination of total chlorine (ISO 7393-3:1990); German version EN ISO 7393-3:2000
Edition 2000-04

Water quality; detection and enumeration of the spores of sulfite-reducing anaerobes (clostridia); part 1: method by enrichment in a liquid medium (ISO 6461-1:1986); german version EN 26461-1:1993
Edition 1993-04

Water quality - Determination of permanganate index (ISO 8467:1993); German version EN ISO 8467:1995
Edition 1995-05

Stationary source emissions - Data acquisition and handling systems - Part 4: Specification of requirements for the installation and on-going quality assurance and quality control of data acquisition and handling systems; German version EN 17255-4:2023
Edition 2023-12

Characterisation of sludges - Settling properties - Part 1: Determination of settleability (Determination of the proportion of sludge volume and sludge volume index); German version EN 14702-1:2006
Edition 2006-06

Water quality - Detection and enumeration of intestinal enterococci - Part 2: Membrane filtration method (ISO 7899-2:2000); German version EN ISO 7899-2:2000
Edition 2000-11

Water quality - Determination of free chlorine and total chlorine - Part 1: Titrimetric method using N,N-diethyl-1,4-phenylenediamine (ISO 7393-1:1985); German version EN ISO 7393-1:2000
Edition 2000-04

Water quality - Determination of aluminium - Atomic absorption spectrometric methods (ISO 12020:1997); German version EN ISO 12020:2000
Edition 2000-05

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

Water quality - Determination of alkalinity - Part 2: Determination of carbonate alkalinity (ISO 9963-2:1994); German version EN ISO 9963-2:1995
Edition 1996-02