Reference number
ISO 4047:1977
ISO 4047:1977
© ISO 2024
International Standard
ISO 4047:1977
Leather — Determination of sulphated total ash and sulphated water-insoluble ash
Edition 1
1977-11
1977-11
ISO 4047:1977
9749
Published
(Edition 1, 1977)
This publication was last reviewed and confirmed in 2021.
Therefore this version remains current.
Abstract
To determine the total mineral content, for example within the framework of a complete leather analysis, the inorganic substances can be ascertained by calculation or determined separately. The principle consists of the carbonization of the leather followed by treatment with sulphuric acid and ashing in an open crucible. The method is applicable to all types of leather.