ISO 4098 | IULTCS/IUC 6:2018 specifies a method of determination of water-soluble matter, water-soluble inorganic matter and water-soluble organic matter. ISO 4098 | IULTCS/IUC 6:2018 is applicable to all leather types. The result obtained by this analysis depends on factors such as: - the degree to which the leather is ground; - the extraction temperature; - the extraction period; - the ratio of leather to water. To obtain comparable results, it is consequently imperative that test conditions be accurately reproduced. In all cases, any ammonium salts in the filtrate are included as part of the water-soluble matter and are then decomposed on ignition. Thus they contribute towards the result for water-soluble organic substances. The concentration of the ammonium salts can be determined in the filtrate separately if required.
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ISO 2418:2017 Leather -- Chemical, physical and mechanical and fastness tests -- Sampling location
ISO 3696:1987 Water for analytical laboratory use -- Specification and test methods
ISO 4044:2017 Leather -- Chemical tests -- Preparation of chemical test samples
ISO 2418:2017 Leather -- Chemical, physical and mechanical and fastness tests -- Sampling location
ISO 3696:1987 Water for analytical laboratory use -- Specification and test methods
ISO 4044:2017 Leather -- Chemical tests -- Preparation of chemical test samples
ISO 4048:2018 Leather -- Chemical tests -- Determination of matter soluble in dichloromethane and free fatty acid content
ISO 4684:2005 Leather -- Chemical tests -- Determination of volatile matter