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EVS-ISO 7890-3:2017 Vee kvaliteet : nitraadi määramine. Osa 3, Spektromeetriline meetod sulfosalitsüülhappega = Water quality : determination of nitrate. Part 3, Spectrometric method using sulfosalicylic acid (ISO 7890-3:1988)
Translator: Anneli Kruve-Viil, Author: Eesti Standardikeskus