基于LIBS的钢液中锰元素的在线监测  

The online monitoring of Mn in steel based on the LIBS

作　　者：马翠红[1] 李曼[1] 杨友良[1] 

机构地区：[1]河北联合大学,河北唐山063000

出　　处：《激光杂志》2015年第2期72-74,共3页Laser Journal

基　　金：国家自然科学基金(61271402)资助课题

摘　　要：应用LIBS技术对钢液中的锰元素进行监测,为了使监测结果更精确,提出选取分析线对的方法减小测量误差。选取基体元素Fe I433.705和Fe II400.676作为内标元素的谱线,选取Mn I441.188和Mn II423.514作为分析元素的谱线。当进行定标曲线建立时,分别将原子线与离子线配成线对,原子线与原子线配成线对,离子线与离子线配成线对建立相应的定标曲线,并将它们用于检验样品的定量分析。结果表明,定量分析时选择合适的分析线对,能使定标曲线的拟合度((92%,测量结果的相对标准差(1%。Using the LIBS technique to monitor the manganese in molten steel,in order to make the quantitative analysis result is more accurate,and put forward a method of selecting the analysis line to reduce the measurement error. Selecting the matrix elements Fe I433. 705 and Fe II400. 676 as internal standard element line,Selecting Mn I441.188 and Mn II423. 514 as element analysis spectral lines. When establishing the calibration curve,using a pair of atoms and ions line,a pair of atoms and atoms line,and a pair of ions and ions line to set up the corresponding calibration curve,and using them to inspect the quantitative analysis of the sample. The results show that the quantitative analysis choose a pair of suitable analysis line can make the calibration curve fitting is more than 92%,the relative standard deviation less than 1% of the measurement result.

关 键 词：激光诱导击穿光谱技术 MN 内标法 谱线选择 定标曲线 

分 类 号：TN247[电子电信—物理电子学]