ISO 5378:1978 Preview

Starches and derived products -- Determination of nitrogen content by the Kjeldahl method -- Spectrophotometric method

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.


General information

  • Current status : Published
    Publication date : 1978-06
  • Edition : 1
    Number of pages : 3
  • :
    ISO/TC 93
    Starch (including derivatives and by-products)
  • 67.180.20
    Starch and derived products

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