Leather — Determination of nitrogen content and "hide substance" — Titrimetric method
NORM herausgegeben am 1.3.1984
Designation standards: ISO 5397:1984
Publication date standards: 1.3.1984
The number of pages: 3
Approximate weight : 9 g (0.02 lbs)
Country: International technical standard
Kategorie: Technische Normen ISO
Description / Abstract: 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.