Determination of titanium, boron, silicon, magnesium, zinc and iron in cast aluminum composite material reinforced with titanium diboride by inductively coupled plasma atomic emission spectrometry
DU Li-li, LI Jing-bin, NIE Fu-qiang
Luoyang Ship Materials Research Institute,Luoyang 471000, China
Abstract：The sample was dissolved with sodium hydroxide. After acidification by nitric acid, the content of titanium, boron, silicon, magnesium, zinc and iron in cast aluminum composite material reinforced with titanium diboride was determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). The matrix effect of aluminum was investigated by two methods, i.e., step-by-step dilution and standard solution series with and without matrix matching. The results showed that the aluminum matrix had no influence on the determination when the mass concentration of sample was in range of 50-500 μg/mL. Under the selected instrumental and experimental conditions, the linear correlation coefficients of testing elements were higher than 0.999 6 when the calibration curve was plotted by standard solution series without matrix matching. The detection limits of elements were between 0.000 9 % and 0.010 %. The proposed method was applied to the determination of titanium, boron, silicon, magnesium, zinc and iron in actual TiB2/AlSi composite materials. The relative standard deviations (RSD, n=11) of determination results were all less than 3%. The recoveries were between 94% and 113%. The content of silicon, magnesium, zinc and iron in two standard samples of cast aluminum was determined according to the experimental method, and the found results were consistent with the certified values.
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DU Li-li, LI Jing-bin, NIE Fu-qiang. Determination of titanium, boron, silicon, magnesium, zinc and iron in cast aluminum composite material reinforced with titanium diboride by inductively coupled plasma atomic emission spectrometry. , 2015, 35(11): 38-43.
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