ICP-MS Determination of Cd, Cr, Cu and Pb in Seashell

Sample of seashell was pretreated by microwave assisted digestion, and the contents of Cd, Cr, Cu and Pb in sample solution were determined by ICP-MS. The isotopes (i.e., 111Cd, 53Cr, 63Cu and 208Pb) of the elements determined were selected to overcome the mass spectrometric interferences. Linear relationships of the 4 elements were kept in definite ranges, with detection limits (3s) in the range of 0.005-0.17 μg·L-1. Values of recovery and RSD′s (n=7) found were 94.7% and 4.3% for Cd, 102.1% and 3.8% for Cr, 101.9% and 1.5% for Cu, 105.3% and 6.0% for Pb.