German Standard Methods for Examination of Water, Waste Water and Sludge; Summary Action and Material Characteristic Parameters (Group H); Determination of the Chemical Oxygen Demand (COD) in the Range over 15 mg/l (H41)
Edition 1980-12

Water quality - Determination of the chemical oxygen demand index (ST-COD) - Small-scale sealed tube method (ISO 15705:2002)
Edition 2003-01

Fertilizers - Determination of magnesium by complexometry; German version EN 16198:2012
Edition 2013-01

Plant biostimulants - Determination of Escherichia coli; German and English version prEN 17716:2023
Edition 2023-06

Chemicals used for treatment of water intended for human consumption - Potassium permanganate; German version EN 12672:2016
Edition 2016-09

Health Informatics - Harmonized data types for information interchange (ISO 21090:2011); English version EN ISO 21090:2011, only on CD-ROM
Edition 2011-06

Extenders - Specifications and methods of test - Part 1: Introduction and general test methods (ISO 3262-1:2020); German version EN ISO 3262-1:2020
Edition 2020-07

Biotechnology - Performance criteria for off-gas systems; German version EN 13095:1999
Edition 2000-02

Sludge, treated biowaste, soil and waste - Calculation of dry matter fraction after determination of dry residue or water content; German version EN 15934:2012
Edition 2012-11

Testing of resins, hardeners and accelerators, and catalyzed resins
Edition 1989-03