ICP-MS Determination of Cr, Cd, Ni, Cu, Pb and Zn in Atmospheric Dust Fall

A method of ICP-MS for the determination of harmful elements, i.e., Cr, Cd, Ni, Cu, Pb and Zn in atmospheric dust fall was proposed. Samples were digested with HF and HNO3 in an open PTFE crucible. The mass spectrometry interferences were corrected by using interference equations. Lower limits of determination (10s) found for the 6 elements were in the range of 0.039-0.87 μg·g-1. Accuracy and precision of the proposed method were tested by analyzing a geological CRM (GBW 07404), giving results in consistency with the certified values and values of RSD′s (n=11) less than 5.0%.