Abstract：The effect of sample dissolution, selection of analysis line, interference of coexisting elements and the acidity of medium on the analysis of recarburizer was studied. The determination method of titanium and calcium in recarburizer by inductively coupled plasma atomic emission spectrometry (ICP-AES) was established. The sample was firstly ashed in muffle furnace followed by dissolution with hydrochloric acid, hydrofluoric acid, nitric acid and perchloric acid. The standard series solutions of titanium and calcium were prepared to plot the calibration curve. The spectral line at 324.199 nm and 317.933 nm were selected as analytical lines for titanium and calcium, respectively. The ICP-AES determination was conducted in 0.6 mol/L hydrochloric acid medium. The detection limit for titanium and calcium was 0.04 μg/mL and 0.07 μg/mL, respectively. The linear range for titanium and calcium was 0-20 μg/mL and 0-60 μg/mL, respectively. The proposed method was applied to the determination of titanium and calcium in recarburizer samples such as coal, gangue, asphalt and petroleum coke. The found results were consistent with the certified values of standard sample. The recoveries were between 96% and 105%.
