Abstract：During the determination of aluminum content in high-alloy steel with complex matrix, Al 308.215 nm or Al 394.401 nm was selected as the analytical line. Without the use of complicated pretreatment method and interference factor correction mode, the content of trace aluminum in high-alloy steel (the mass fraction of chromium and nickel was less than 20%; the mass fraction of copper, manganese, tungsten and cobalt was less than 5%; the mass fraction of molybdenum was less than 4%) was determined by high-resolution sequential inductively coupled plasma atomic emission spectrometry (ICP-AES). Moreover, the spectral interference of proposed method was compared with the whole spectrum inductively coupled plasma atomic emission spectrometry with normal resolution. The results showed that the low limit of determination of aluminum was 0.002% (mass fraction). The matrix effect could be eliminated by the calibration curve with matrix matching. The linear correlation coefficient was higher than 0.999 9. The content of aluminum in high-alloy steel sample was determined according to the experimental method. The relative standard deviations (RSD, n=9) were less than 6.2%. The found results of standard samples were consistent with the certified values.
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