ISO 937:1978
Meat and meat products — Determination of nitrogen content (Reference method)
| Fecha edición: |
2023-08-28
Anulada
|
|---|---|
| Fecha de anulación: | 2023-08-28 |
| Idiomas disponibles: | Inglés, Francés |
| Resumen: | The method consists in digesting of a test portion with concentrated sulphuric acid, using copper(II) sulphate as a catalyst, to convert organic nitrogen to ammonia ions. Then alkalisation, distillation of the liberated ammonia into an excess of boric acid solution, titration with hydrochloric acid to determine the ammonia bound by the boric acid, and calculation of nitrogen content of the sample from the amount of ammonia produced. |
| ICS: | 67.120.10 - Carne y productos cárnicos |
| CTN: | ISO/TC 34/SC 6 - 47880 |
|
Anulaciones Normas |
Es anulada por ISO 937:2023 |
|
Equivalencia Internacional |
Idéntica DIN 10150:1980-03 |










