EN ISO 5378:1994
Current
The latest, up-to-date edition.
Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Spectrophotometric method (ISO 5378:1978)
25-08-1994
Foreword
1 SCOPE AND FIELD OF APPLICATION
2 REFERENCES
3 DEFINITIONS
4 PRINCIPLE
5 REAGENTS
6 APPARATUS
7 PROCEDURE
8 EXPRESSION OF RESULTS
9 TEST REPORT
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.
| Committee |
CEN/BT
|
| DocumentType |
Standard
|
| PublisherName |
Comite Europeen de Normalisation
|
| Status |
Current
|
| Standards | Relationship |
| UNI EN ISO 5378 : 1995 | Identical |
| ISO 5378:1978 | Identical |
| NF EN ISO 5378 : 1994 | Identical |
| NEN EN ISO 5378 : 1994 | Identical |
| I.S. EN ISO 5378:1995 | Identical |
| UNE-EN ISO 5378:1995 | Identical |
| NBN EN ISO 5378 : 1994 | Identical |
| BS EN ISO 5378:1994 | Identical |
| PN EN ISO 5378 : 2000 | Identical |
| SN EN ISO 5378 : 1994 | Identical |
| NS EN ISO 5378 : 1ED 1994 | Identical |
| DIN EN ISO 5378:1994-10 | Identical |
| ISO 1871:2009 | Food and feed products General guidelines for the determination of nitrogen by the Kjeldahl method |
| ISO 3188:1978 | Starches and derived products — Determination of nitrogen content by the Kjeldahl method — Titrimetric method |
| ISO 1227:1979 | Starch, including derivatives and by-products — Vocabulary |
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