On the other hand,Fe,which is in over whelming excess in the sorbent,is a line-rich element and the introduction of the nanometer-sized particles into the ICP in slurry form, may cause spectral interference to the signal of metalloids and therefore systematic errors .It has already been demonstrated that the presence of ceria composite material in plasma does not influence the atomization capacity and the overall performance of the method,when the slurry is aspirated .