Abstract：The aluminum oxide could not be dissolved in iron trichloride solution. According to this character, the metallic aluminum in aluminum matrix composite slagging agent sample was leached with 50 mL of 50 g/L iron trichloride solution. The sample was dissolved for 60 min under the stirring by magnetic stirrer. After filtration, the precipitate was washed with hydrochloric acid (2+98). The calibration curve was prepared by matrix matching method to eliminate the influence of matrix effect. The Al 308.215 nm and Al 396.152 nm were selected as the analytical lines. The metallic aluminum in aluminum matrix composite slagging agent was determined by the inductively coupled plasma atomic emission spectrometry (ICP-AES). The influence of coexisting elements in sample was investigated by experiments. The results showed that the determination of metallic aluminum was not interfered under the follow conditions: w(CaO,SiO2)≤40%,w(MgO)≤30%,w(MnO)≤15%,w(P2O5,BaO)≤10%,w(V,Mo)≤5%,w(Ti)≤3%,w(Ni,Nb)≤1% and w(Cr,Cu)≤0.2%. When the mass fraction of metallic aluminum in aluminum matrix composite slagging agent sample was less than 2%, Al 396.152 nm was selected as the analytical line, and the linear regression equation of calibration curve was y=27 500 x+669.1 with correlation coefficient of r=0.999 4. When the mass fraction of metallic aluminum in aluminum matrix composite slagging agent sample was not less than 2%, Al 308.215 nm was selected as the analytical line, and the linear regression equation of calibration curve was y=4 502 x+56.1 with correlation coefficient of r=0.999 9. The detection limit of metallic aluminum in this method was 0.001% (mass fraction). The content of metallic aluminum in aluminum matrix composite slagging agent sample was determined according to the experimental method. The relative standard deviations (RSD, n=8) were less than 2%. The found results were consistent with those obtained by iron trichloride leaching-fluoride replacement EDTA titration method.
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