ISO 5378:1978
Current
The latest, up-to-date edition.
Starches and derived products — Determination of nitrogen content by the Kjeldahl method — Spectrophotometric method
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
English, French
01-06-1978
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.
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.