Water quality - Sampling - Part 3: Guidance on the preservation and handling of water samples (ISO 5667-3:2003); German version EN ISO 5667-3:2003, Corrigenda to DIN EN ISO 5667-3:2004-05— 2 стр.
Chemicals used for treatment of water intended for human consumption - Antiscalants for membranes - Phosphonic acids and salts; German version EN 15040:2006— 24 стр.
Chemicals used for treatment of water intended for human consumption - Antiscalants for membranes - Polycarboxilic acids and salts; German version EN 15039:2006— 27 стр.
Chemicals used for treatment of water intended for human consumption - Antiscalants for membranes - Polycarboxilic acids and salts; German version EN 15039:2014— 28 стр.
Products used for treatment of water intended for human consumption - Inorganic supporting and filtering materials - Methods of test; German version EN 12902:1999— 22 стр.
Methods of soil investigations for agricultural engineering - Chemical laboratory tests - Part 10: Testing and evaluation of water for irrigation— 11 стр.