Abstract：Seven trace elements in pure copper, including Fe, Zn, As, Sn, Sb, Pb, Bi, were determined by laser ablation solid injection combined with inductively coupled plasma mass spectrometry (ICP-MS). The laser ablation parameters were optimized and the following experimental conditions were adopted: the laser energy was 100%, the spot size was 200μm, the scan rate was 50μm/s, and the carrier gas flow rate was 0.4L/min. The certified reference material of pure copper was determined under the optimum experimental conditions. The relative sensitivity factors (RSF) of tested elements were obtained based on the certified values of certified reference material. The detection limits of elements were 0.0065-0.31μg/g. The trace impurities in pure copper sample were determined according to the experimental method, and the relative standard deviations (RSD, n=6) of results were between 6.6% and 26%. The contents of impurity elements in pure copper actual sample were quantitatively analyzed respectively according to ICP-MS in GB/T 5121.28-2010 of national standard method and the proposed method. Meanwhile, the consistency test of determination results by the above two methods was conducted. For these four elements including Fe, Zn, Sn and Bi, the results showed that t was less than t0.05,9, which indicated good consistency for the two methods with comparability. Since the contents of other elements were lower than the detection limit of GB/T 5121.28-2010 of national standard method, the consistency test of average value was not performed.
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