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Norm
ISO 5397:1984
Issue date: 1984 03 01
Leather — Determination of nitrogen content and "hide substance" — Titrimetric method
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...
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Valid
Publisher:
International Organization for Standardization
Format:
Digital | 3 Pages
Language:
English
ICS
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.