Найдено: 8
1 Scope This document specifies a method for the determination of nitrate as NO 3 -N in water of various origin such as natural water (including groundwater, surface water and bathing water), drinkin…
Overview SIST EN ISO 23696-2:2026 – Water quality – Determination of nitrate in water using small-scale sealed tubes – Part 2: Chromotropic acid colour reaction provides a standardized method for mea…
Overview SIST EN ISO 23696-1:2026 establishes a standardized method for the determination of nitrate (as NO3-N) in water using small-scale sealed tubes based on the dimethylphenol colour reaction. De…
Overview EN ISO 23696-1:2025 (identical to ISO 23696-1:2023) specifies a photometric method for determination of nitrate as NO3‑N in water using small-scale sealed tubes based on the dimethylphenol c…
Overview EN ISO 23696-2:2025 (ISO 23696-2:2023) specifies a validated small-scale sealed tube method for the determination of nitrate as NO3‑N in water (groundwater, surface water, bathing water, dri…
Overview ISO 23696-1:2023 specifies a standardized, small-scale sealed-tube method for the determination of nitrate as NO3‑N in various water matrices (natural waters, drinking water, bathing water a…
Overview ISO 23696-2:2023 specifies a validated method for the determination of nitrate as NO3‑N in water using small-scale sealed tubes based on the chromotropic acid colour reaction. The procedure…