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: ISO/TC 93 Starch (including derivatives and by-products)
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