Leather — Determination of sulphated total ash and sulphated water-insoluble ash
NORMA vydána dne 1.11.1977
Označení normy: ISO 4047:1977
Datum vydání normy: 1.11.1977
Počet stran: 2
Přibližná hmotnost: 6 g (0.01 liber)
Země: Mezinárodní technická norma
Kategorie: Technické normy ISO
Description / 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.