This standard was last reviewed and confirmed in 2019. Therefore this version remains current.
Destruction of organic matter by sulphuric acid in the presence of a compound catalyst (see ISO 1871), alkalization of the reaction products, destillation of the liberated ammonia and collection in a sulphuric acid solution, followed by measuring of the ammonium salt formed after the addition of Nessler reagent. The method is provided for contents less than 0,025 % (m/m). For greater contents, see ISO 3188.
Status : PublishedPublication date : 1978-06
Edition : 1Number of pages : 3
Technical Committee:Starch (including derivatives and by-products)