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ISO 5397:1984

Leather — Determination of nitrogen content and "hide substance" — Titrimetric method ISO 5397:1984

Publication date:   Mar 1, 1984

General information

90.60   Close of review   Sep 3, 2026

ISO

IULTCS International Union of Leather Technologists and Chemists Societies

International Standard

59.140.30   Leather and furs

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Scope

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.

Life cycle

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PUBLISHED
ISO 5397:1984
90.60 Close of review
Sep 3, 2026




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