RO
SR EN ISO 5378:2002
Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Spectrophotometric method (ISO 5378:1978)
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.
Status :
Valid
Approval date : 9/24/2002
Publish date : 9/25/2002
Number of pages : 10
ICS : 67.180.20 Starch and derived products
Technical Committee : 180 - Cereal and cereal products
- Replaces SR ISO 5378:1996
- Normative reference SR EN ISO 3188:2002