Determination of aluminium,chromium,manganese,silicon in iron-silicon magnetically soft alloy by inductively coupled plasma atomic emission spectrometry
LU Qing1,2,ZHOU Wei2,CHENG Da-wei2,TANG Xiao-lin2,LIU Yin-kai2
1.Central Iron and Steel Research Institute,Beijing 100081,China; 2.NCS Testing Technology Co.,Ltd.,Beiing 100094,China
Abstract：The sample was dissolved with the mixed composed of nitric acid (1+1) and hydrofluoric acid, and the calibration curve was plotted with matix matching method. Consequently, a method for the determination of Al, Cr, Mn, Si in Fe-Si magnetically soft alloy by inductively coupled plasma atomic emission spectrometry (ICP-AES) is developed. Al 396.152 nm, Cr 267.716 nm, Mn 257.610 nm, Si 251.611 nm are selected as the analysis spectral lines for Al, Cr, Mn, Si. The results showed that Y as internal element is good for the precision of determination. The detection limits of elements were between 0.4 μg/g and 7.9 μg/g and their linear correlation coefficients were higher than 0.999. Under the selected experimental conditions, the relative standard deviations (RSD,n=6) of determination results were between 0.86% and 2.5%. The recoveries were between 95% and 106%. The comparison test showed that the values determined by ICP-AES were consistent with those by GB/T 223.81-2007, GB/T 223.11-2008, GB/T 223.63-1988 and GB/T 223.60-1997.
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