Water. Examination. Chemical substances

prEN ISO 23695 - Water quality - Determination of ammonium nitrogen in water - Small-scale sealed tube method (ISO 23695:2023)
Categories: Water. Examination. Chemical substances
Committee: CEN/TC 230 (Water analysis)
Origin: CEN
Close date: 16 Oct 2025
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prEN ISO 23696-1 - Water quality - Determination of nitrate in water using small-scale sealed tubes - Part 1: Dimethylphenol colour reaction (ISO 23696-1:2023)
Categories: Water. Examination. Chemical substances
Committee: CEN/TC 230 (Water analysis)
Origin: CEN
Close date: 16 Oct 2025
Draft Details
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prEN ISO 23696-2 - Water quality - Determination of nitrate in water using small-scale sealed tubes - Part 2: Chromotropic acid colour reaction (ISO 23696-2:2023)
Categories: Water. Examination. Chemical substances
Committee: CEN/TC 230 (Water analysis)
Origin: CEN
Close date: 16 Oct 2025
Draft Details
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prEN ISO 23697-1 - 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)
Categories: Water. Examination. Chemical substances
Committee: CEN/TC 230 (Water analysis)
Origin: CEN
Close date: 16 Oct 2025
Draft Details
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prEN ISO 23697-2 - 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)
Categories: Water. Examination. Chemical substances
Committee: CEN/TC 230 (Water analysis)
Origin: CEN
Close date: 16 Oct 2025
Draft Details
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