1 Scope
This part of ISO 17072 specifies a method for the determination of the total metal content in leather using digestion of the leather and subsequent determination with inductively coupled plasma/optical emission spectrometry (ICP/OES), or inductively coupled plasma/mass spectrometry (ICP/MS), or atomic absorption spectrometry (AAS) or spectrometry of atomic fluorescence (SFA).
This method determines the total metal content in leather; it is not compound-specific or specific to the oxidation 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) |
The quantification limit of total lead is 8 mg/kg (see Annex A).
This part of ISO 17072 is not applicable to chromium-tanned leathers. In this case, ISO 5398-1, or ISO 5398-2, or ISO 5398-3, or ISO 5398-4 are used.