1 Scope
This part of ISO 17072 specifies a method for the determination of extractable metals in leather using extraction with an acid artificial-perspiration solution and subsequent determination with inductively coupled plasma/optical emission spectrometry (ICP-OES), or inductively coupled plasma/atomic emission spectrometry (ICP/AES), or inductively coupled plasma/mass spectrometry (ICP/MS), or atomic absorption spectrometry (AAS) or spectrometry of atomic fluorescence (SFA).
This method is especially suitable for determining the extractable chromium in chromium-tanned leathers.
This method determines extractable metals in leather; it is not compound-specific or specific to the oxidation state of the metals.
The method is also applicable for the determination of many extractable metals, including:
| Aluminium (Al) | Copper (Cu) | Nickel (Ni) |
| Antimony (Sb) | Iron (Fe) | Potassium (K) |
| Arsenic (As) | Lead (Pb) | Selenium (Se) |
| Barium (Ba) | Magnesium (Mg) | Tin (Sn) |
| Cadmium (Cd) | Manganese (Mn) | Titanium (Ti) |
| Calcium (Ca) | Mercury (Hg) | Zinc (Zn) |
| Chromium (Cr) | Molybdenum (Mo) | Zirconium (Zr) |
| Cobalt (Co) |
The quantification limit of extractable lead is 3 mg/kg (see Annex A).