Codes & Standards - Purchase
ISO 5397:1984
Leather -- Determination of nitrogen content and "hide substance" -- Titrimetric method
SKU: iso_011439_104447
Published by ISO
Publication Year 1984
1 Edition
3 pages
Product Details
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.