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ISO 5378:1978 (R2024)
Starches and derived products — Determination of nitrogen content by the Kjeldahl method — Spectrophotometric method
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Summary
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.
Notes
90.93 : Norme internationale confirmée
Technical characteristics
| Publisher | International Organization for Standardization (ISO) |
| Publication Date | 06/01/1978 |
| Confirmation Date | 09/11/2024 |
| Edition | 1 |
| Page Count | 3 |
| EAN | --- |
| ISBN | --- |
| Weight (in grams) | --- |
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01/06/1978
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