Determination of zirconium in silicon-zirconium alloy by inductively coupled plasma atomic emission spectrometry

Abstract

The sample was dissolved with hydrochloric acid, hydrofluoric acid, perchloric acid and nitric acid. Zr 257.139 nm was selected as the analytical line. The influence of matrix effect was eliminated by preparing calibration curves using high purity iron matrix matching method. The determination method of high content zirconium in silicon-zirconium alloy by inductively coupled plasma atomic emission spectrometry (ICP-AES) was established. The mass fraction of zirconium in range of 3.04%-30.42% was linear to the corresponding emission intensity. The linear correlation coefficient of calibration curve was 0.999 8. The detection limit was 0.007% (mass fraction), and the low limit of determination was 0.033%. The content of zirconium in actual sample and standard sample of silicon-zirconium alloy was determined according to the experimental method. The relative standard deviations (RSD, n=6) were less than 1.2%. The proposed method was applied to the determination of zirconium in three silicon-zirconium alloy samples, and the found results were consistent with those obtained by mandelic acid gravimetry.