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ISO 5397:1984

Leather — Determination of nitrogen content and "hide substance" — Titrimetric method

Mar 1, 1984

General information

90.20     Apr 15, 2026

ISO

IULTCS

International Standard

59.140.30  

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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.

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PUBLISHED
ISO 5397:1984
90.20 Standard under periodical review
Apr 15, 2026

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