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ISO 5378:1978

Current Revision

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

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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.


SDO ISO: International Organization for Standardization
Document Number ISO 5378
Publication Date Not Available
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO TC 93
Publish Date Document Id Type View
Not Available ISO 5378:1978 Revision