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NA 119

DIN Standards Committee Water Practice

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Projects of NA 119

Number: 411

DIN EN ISO 23697-1 2025-05-23 Water quality - Determination of total bound nitrogen (ST-TNb) in water using small-scale sealed tubes - Part 1: Dimethylphenol colour reaction (ISO 23697-1:2023); German version EN ISO 23697-1:2025 More  Comment 
DIN EN ISO 23696-1 2025-05-23 Water quality - Determination of nitrate in water using small-scale sealed tubes - Part 1: Dimethylphenol colour reaction (ISO 23696-1:2023); German version EN ISO 23696-1:2025 More  Comment 
DIN EN ISO 23697-2 2025-05-23 Water quality - Determination of total bound nitrogen (ST-TNb) in water using small-scale sealed tubes - Part 2: Chromotropic acid colour reaction (ISO 23697-2:2023); German version EN ISO 23697-2:2025 More  Comment 
DIN EN ISO 23696-2 2025-05-22 Water quality - Determination of nitrate in water using small-scale sealed tubes - Part 2: Chromotropic acid colour reaction (ISO 23696-2:2023); German version EN ISO 23696-2:2025 More  Comment 
DIN EN 545 rev 2025-05-20 Ductile iron pipes, fittings, accessories and their joints for water pipelines - Requirements and test methods More  Comment 
DIN EN ISO 23695 2025-05-20 Water quality - Determination of ammonium nitrogen in water - Small-scale sealed tube method (ISO 23695:2023); German version EN ISO 23695:2025 More  Comment 
DIN EN ISO 15874-2 rev 2025-05-13 Plastics piping systems for hot and cold water installations - Polypropylene (PP) - Part 2: Pipes More  Comment 
DIN EN ISO 11268-1 rev 2025-05-13 Soil quality - Effects of pollutants on earthworms - Part 1: Determination of acute toxicity to Eisenia fetida/Eisenia andrei More  Comment 
DIN EN ISO 15874-3 rev 2025-05-12 Plastics piping systems for hot and cold water installations - Polypropylene (PP) - Part 3: Fittings More  Comment 
DIN EN ISO 15874-1 rev 2025-05-12 Plastics piping systems for hot and cold water installations - Polypropylene (PP) - Part 1: General More  Comment 

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