This part of ISO 5398 describes the determination of chrome by colorimetric means. It is applicable to leathers which are expected to have chromic oxide contents in excess of 0,05 %.
EN ISO 5398-2:2009 history
2009EN ISO 5398-2:2009 Leather - Chemical determination of chromic oxide content - Part 2: Quantification by colorimetric determination (ISO 5398-2:2009)