UNE-EN ISO 17072-2:2023

This document specifies a method for the determination of the total metal content in leather usingdigestion of the leather and subsequent determination with inductively coupled plasma optical emissionspectrometry (ICP-OES), inductively coupled plasma mass spectrometry (ICP-MS), atomic absorptionspectrometry (AAS) or spectrometry of atomic fluorescence (SFA).This method determines the total metal content in leather; it is not compound-specific or specific to theoxidation state of the metals.The method is applicable for determining the following metals:Aluminium (Al) Copper (Cu) Potassium (K)Antimony (Sb) Iron (Fe) Selenium (Se)Arsenic (As) Lead (Pb) Silicon (Si)Barium (Ba) Magnesium (Mg) Sodium (Na)Cadmium (Cd) Manganese (Mn) Tin (Sn)Calcium (Ca) Mercury (Hg) Titanium (Ti)Chromium (Cr) (except chromium-tanned leathers) Molybdenum (Mo) Zinc (Zn)Cobalt (Co) Nickel (Ni) Zirconium (Zr)This method is also suitable for determining Boron (B) in leather.In the case of chromium-tanned leathers, it is often more relevant to use ISO 5398-1[1], ISO 5398-2[2],ISO 5398-3[3] or ISO 5398-4 [4].Interlaboratory test results and the quantification limits possible with ICP-OES are given in Table A.1and Table A.2 of Annex A.For the determination of Al and Ti in leather the extraction procedure given in Annex B shall be used.