scope:

This method is applicable to all leather types. The result obtained from 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, is is consequently imperative that test conditions should be accurately reproduced. In all cases, any ammonium salts in the filtrate are included as part pf the water-soluble organic substances. The concentration of the ammonium salts can be determined in the filtrate separately if required.