International Standard
ISO 5397:1984
Leather — Determination of nitrogen content and "hide substance" — Titrimetric method
Reference number
ISO 5397:1984
ISO 5397:1984
Edición 1
1984-03
1984-03
© ISO 2024
International Standard
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ISO 5397:1984
11439
No disponible en español
Publicado
(Edición 1, 1984)
Esta norma se revisó y confirmó por última vez en 2021.
Por lo tanto, esta versión es la actual.
Resumen
The principle consists in decomposition of a test portion by Kjeldahl method, distillation of the ammonia liberated, determination of the nitrogen content by titration of the ammonia with sulfuric or hydrochloric acid, using phenolphthalein as indicator. The method is applicable to all types of leather in all types of tannage.
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