ISO 5378:1978 PDF
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Starches and derived products — Determination of nitrogen content by the Kjeldahl method — Spectrophotometric method
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 | 1978 |
|---|---|
| Published Date | 1978 |
| Published By | International Standardization Organisation |
| Page Count | 3 |
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