Abstract：The sample was dissolved with mixed hydrochloric acid and nitric acid (1+1+1). The mass spectrometry interference was eliminated by selecting 27Al as determination isotope and setting moderate resolution (R=4 000). The calibration curve was prepared by standard addition method to avoid the matrix effect as well as complicated pretreatment process of matrix separation. Thus, the determiantion of trace aluminum in iron-based amorphous alloy was realized by inductively coupled plasma mass spectrometry (ICP-MS). The results showed that 0.100 0 g of sample could be fully dissolved in quartz triangular flask by low temperature heating on electric hot plate with 10.0 mL of hydrochloric acid-nitric acid (1+1+1) as solvent. The calibration curve was established by standard addition method with correlation coefficient as 0.999 0 and linear range of 0.000 1%-0.005 0%. The detection limit of method was 0.035 μg/g. The experimental method was applied to the determination of trace aluminum in two iron-based amorphous alloy samples. The relative standard deviations (RSD, n=9) were between 6.1% and 7.1%, and the recoveries were between 96% and 106%. This proposed method was compared with inductively coupled plasma atomic emission spectrometry (ICP-AES), and the determination results of trace aluminum in actual iron-based amorphous alloy sample were consisit.
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