Abstract：A method for the determination of sufur content in iron, steel and alloys by inductively coupled plasma mass spectrometry with dynamic reaction cell (DRC-ICP-MS) has been studied. Since the sulfur was prone to suffer from polyatomic ions interference, the dynamic reaction cell technique of quadrupole mass spectrometer was adopted to overcome the polyatomic ion interference of 32S+ (m/z=32) by measuring the 32S16O+ (m/z=48) with O2 as reaction gas, realizing the quantitative analysis of S. The optimal working conditions of instrument, the interference effect of matrix Fe and coexisting ions (Ca and Ti) were investigated. The appropriate isotopes for determination were selected. The inhibition effect of matrix was corrected by standard addition method. The detection limit of method was 4.0 μg/L. This method has been applied to the determination of actual samples, and the results were consistent with the certified values and those obtained by other methods with recoveries of 99 %-104 % and relative standard deviations (RSD) smaller than 6.0 %.
于媛君，亢德华, 王铁. 动态反应池-电感耦合等离子体质谱法测定钢铁及合金中硫[J]. 冶金分析, 2011, 31(12): 6-10.
YU Yuan-jun, KANG De-hua, WANG Tie. Determination of sulfur in iron, steel and alloys by inductively coupled plasma mass spectrometry with dynamic reaction cell. , 2011, 31(12): 6-10.
