Abstract：The optimal analytical parameters of glow discharge optical emission spectrometer (GDOES) were obtained as follows by condition experiments: the analytical power of 30 W, the argon pressure of 620 Pa, the presputtering time of 200 s and the integral time of 10 s. The calibration curve was established by the correction of sputtering rate with several matrix certified reference materials. The content and distribution of lead, cadmium and chromium in galvanized layer of steel plate were quantitatively analyzed. The analytical spectra of elements in galvanized layer with the change of depth were obtained. The integral computation method of elements in galvanized layer was defined by the proposed method to determine the content of lead, cadmium and chromium. The detection limit of method was determined with pure zinc certified reference materials. It was found that the detection limit of lead, cadmium and chromium was 3.65, 1.33 and 0.21 μg/g, respectively. The shortterm precision was investigated by determination of pure zinc certified reference materials, and the relative standard deviation (RSD, n=15) for lead, cadmium and chromium was 2.8%, 1.3% and 6.6%, respectively. The typical galvanized steel plate was prepared and determined by the experimental method. The results were well consistent with those obtained by inductively coupled plasma mass spectrometry. The proposed method was applicable for the rapid and quantitative determination of lead, cadmium and chromium in galvanized layer (thickness of 1-50 μm) on the surface of steel plate.
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