Abstract：A method was developed for simultaneous determination of La, Ce, Pr, Nd, Sm in iron, steel and alloy by inductively coupled plasma mass spectrometry （ICP-MS）after sample dissolution with diluent aqua regia. The optimized operation parameters were obtained. The spectral interference was eliminated by selecting appropriate analytical isotopes. Standard addition method was used for calibration curve. The results showed that the matrix effect was negligible when the concentration of Fe matrix was not higher than 1 mg/mL. Therefore, the matrix effect could be eliminated by controlling its concentration as 1 mg/mL. The long-term shift of analytical signals was compensated by selecting In as internal standard element. The detection limits were 0.023 ng/mL for La, 0.021 ng/mL for Ce, 0.025 ng/mL for Pr, 0.075 ng/mL for Nd, and 0.057 ng/mL for Sm, respectively. The proposed method has been applied in the determination of actual samples. The results were accordance with those obtained by inductively coupled plasma atomic emission spectrometry（ICP-AES）, and the relative standard deviations were no more than 11.8%.
于媛君，亢德华，王铁，顾继红，杨丽荣. 电感耦合等离子体质谱法测定钢铁及合金中镧、铈、镨、钕、钐[J]. 冶金分析, 2011, 31(9): 18-21.
YU Yuan-jun, KANG De-hua, WANG Tie, GU Ji-hong, YANG Li-rong. Determination of lanthanum, cerium, praseodymium, neodymium, samarium in iron, steel and alloy by inductively coupled plasma mass spectrometry. , 2011, 31(9): 18-21.
