ISO 5378:1978
ISO 5378:1978 Starches and derived products – Determination of nitrogen content by the Kjeldahl method – Spectrophotometric method
CDN $82.00
Description
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.
Edition
1
Published Date
1978-06-01
Status
PUBLISHED
Pages
3
Language
English
Format
Secure PDF
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Abstract
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.
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