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ISO 5378:1978

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

Standard Details

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

Status : Published
Standard Type: Main
Document No: ISO 5378:1978
Document Year: 1978
Pages: 3
Edition: 1
  • Section Volume:
  • ISO/TC 93. Starch (including derivatives and by-products)

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ISO 5378:1978
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