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DIN EN ISO 15923-1
Water quality - Determination of selected parameters by discrete analysis systems - Part 1: Ammonium, nitrate, nitrite, chloride, orthophosphate, sulfate and silicate with photometric detection (ISO 15923-1:2013); German version EN ISO 15923-1:2024
ISO/CD 19643
Meat and meat products - Determination of nitrite and nitrate - Continuous flow analysis (CFA) method
NA 057-01-07 AA
Nitrate, nitrite
CEN/TC 275/WG 7
Nitrate, nitrite