Due to the very low detection limits and multi- element capability of inductively coupled plasma-mass spectrometry (ICP-MS), this technique is considered as the most appropriate for the determination of PGMs in these samples [9]. However, direct aspiration of environmental samples, e.g. sea water, into the plasma are often a source of spectral (‘‘overlap’’ or ‘‘mass’’) and no-spectral (matrix) interferences caused by monoa tomic and polyatomic ions, formed in the plasma from matrix