Abstract：The contents of chromium and copper affected the microstructure and properties of titanium and titanium alloy, and should be accurately analyzed. The samples were dissolved in sulfuric acid-nitric acid system. Cr 267.716nm and Cu 327.393nm were selected as the analytical lines. The background was deducted by two-point calibration method. The calibration curves were drawn by matrix matching of titanium. The contents of chromium and copper in titanium and titanium alloy were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). The calibration curves of elements had good linearity with correlation coefficients higher than 0.999. The detection limits were between 0.04μg/g and 6.0μg/g. The contents of chromium and copper in three titanium and titanium alloy samples were determined according to the experimental method. The relative standard deviations (RSD, n=10) of determination results were less than 5%. The proposed method was applied for the determination of chromium and copper in five certified reference materials of titanium alloy. The determination results were consistent with the certified values. The analytical errors were within the allowable range in the laboratory.
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