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Pezentul Standard Interna?ional stabile?te o metod? de dozare a azotului amoniacal din ?ngr???mintele care con?in alte substan?e care elibereaz? amoniac, prin tratarea cu hidroxid de sodiu, ca de exemplu ureea sau produ?ii de condensare ureo-aldehidici.
Fertilizers. Determination of ammoniacal nitrogen content in the presence of other substances which release ammonia when treated with sodium hydroxide. Titrimetric method
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