高分辨电感耦合等离子体质谱法测定纯铁和低合金钢中痕量磷  

Determination of trace phosphorus in pure iron and low alloy steel by high resolution inductively coupled plasma mass spectrometry

作　　者：聂玲清[1] 纪红玲[1] 

机构地区：[1]宝山钢铁股份有限公司研究院,上海201900

出　　处：《冶金分析》2008年第10期19-22,共4页Metallurgical Analysis

摘　　要：研究了用高分辨电感耦合等离子体质谱（HR-ICP-MS）法测定纯铁及低合金钢中痕量磷的方法。在优化的仪器条件下，采用基体匹配，并用Sc为内标对基体效应进行校正。由于磷存在较严重的^15N^16O，^14N^16O^1H，^12C^18O^1H等多原子离子干扰，利用仪器的高分辨性能，选择中分辨率扫描可消除这些离子对测定磷的影响。磷含量在0.0002％-0．0050％（ω／％）范围内线性良好，相关系数为0．9995。检测下限为0．00008％。方法用于纯铁和低合金钢标准样品中磷的测定，结果同认定值相一致，相对标准偏差为6％-17％，回收率为106％-116％。A method for analysis of trace phosphorus in pure iron and low alloy steel by high resolution inductively coupled plasma mass spectrometry （HR-ICP-MS） was studied. Matrix effect was corrected through matrix matching and Sc as internal standard element under optimized operating conditions.Interference from multi-atomic ions such as ^15N^16O,^14N^16O^1H,^12C^18O^1H could be eliminated hy choosing middle resolution （MR） on high resolution inductively coupled plasma mass spectrometer. A good linearity was found in the range of 0.0002%-0.0050%（w/%） for P and the correlation coefficient was 0.9995. The low limit of determination is 0. 00008%. The method has been applied for the deter-mination of trace P in pure iron and low alloy steel samples with the relative standard deviation of 6%-17% and the recovery of 106 %-116%. The results are in good agreement with the certified values.

关 键 词：高分辨电感耦合等离子体质谱 纯铁 低合金钢 痕量磷 

分 类 号：TG115.337[金属学及工艺—物理冶金]