STN EN ISO 23695
| Name: | STN EN ISO 23695 |
| Validity: | Valid |
| Number of pages: | 24 |
| Language: |
EN
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| Slovak title | Kvalita vody. Stanovenie amoniakového dusíka vo vode. Skúmavková metóda pre malé objemy vzoriek (ISO 23695: 2023) |
| English title | Water quality - Determination of ammonium nitrogen in water - Small-scale sealed tube method (ISO 23695:2023) |
| Release Date: | 01. 05. 2026 |
| Date of withdrawal: | |
| ICS: | 13.060.50 |
| Sorting character/National clasification code | 75 7492 |
| Level of incorporation: | idt ISO 23695:2023, idt EN ISO 23695:2025 |
| Official Journal | 04/26 |
| Amendments | |
| Replaced by: | |
| Repleces: | |
| Note in Official Journal: | Rozpracovaná prekladom. |
| Subject of the standard: | This document specifies a method for the determination of ammonium nitrogen (NH4-N) in drinking water, groundwater, surface water, wastewater, bathing water and mineral water using the small-scale sealed tube method. The result can be expressed as NH4 or NH4-N or NH3 or NH3-N. NOTE 1 In the habitual language use of sewage treatment and on the displays of automated sealed-tube test photometers or spectrophotometers, NH4 without indication of the positive charge has become the common notation for the parameter ammonium. This notation is adopted in this document even though not being quite correct chemical nomenclature. This method is applicable to (NH4-N) concentration ranges from 0,01 mg/l to 1 800 mg/l of NH4-N. The measuring ranges of concentration can vary depending on the type of small-scale sealed tube method of different manufacturers. Concentrations even slightly higher than the upper limit indicated in the manufacturers manual relating to the small-scale sealed tube method used, cannot be ... |
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