Please select and order
€37.40
excl. VAT
Add to cart
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...
Valid
Publisher:
International Organization for Standardization
Format:
Digital | 3 Pages
Language:
English

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.