激光诱导荧光辅助激光诱导击穿光谱对合金结构钢中Mo的定量分析  

Quantitative analysis of Mo in alloy structural steel using laser-induced fluorescence assisted laser-induced breakdown spectroscopy

作　　者：莫凯峰 唐云 杨泽恩 王胜 郭恩新 廖嘉乐 MO Kaifeng;TANG Yun;YANG Ze'en;WANG Sheng;GUO Enxin;LIAO Jiale(Hunan Province Key Laboratory of Intelligent Sensors and Advanced Sensor Materials,School of Physics and Electronics Science,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南科技大学物理与电子科学学院,湖南省智能传感与新型传感器材料重点实验室,湖南湘潭411201

出　　处：《光学精密工程》2024年第20期2999-3005,共7页Optics and Precision Engineering

基　　金：湖南省自然科学基金面上项目(No.2024JJ5166);国家自然科学基金(No.62005078);湖南省教育厅科学研究项目(No.21B0477);智能传感器与新型传感材料湖南省重点实验室开放基金项目(No.E22341)。

摘　　要：合金结构钢中钼(Mo)元素的含量对性能有重要影响,因此检测合金结构钢中Mo元素的含量具有重要意义。然而,合金结构钢中基体元素Fe的谱线干扰和自吸收效应严重影响激光诱导击穿光谱对Mo元素定量分析的准确性。在这项工作中,使用了激光诱导荧光辅助激光诱导击穿光谱(LIBS-LIF)来解决这些问题。Mo I 379.83 nm,Mo I 386.41 nm,Mo I 390.30 nm三条谱线被选为分析线。结果表明,LIBS-LIF能够增强三条分析线的光谱强度,消除了光谱干扰,并且随着Mo含量从0.019 wt.%增加到1.4 wt.%,Mo元素谱线的光谱强度也明显增强。与传统的LIBS技术相比,Mo I 386.41 nm谱线的自吸收因子降低了99.99%,交叉验证均方根误差降低了65.37%,平均相对偏差降低了85.69%,平均相对标准偏差降低了20.20%。因此,LIBS-LIF可以有效地减小光谱干扰和自吸收效应,提高定量分析的准确性。The content of molybdenum(Mo)element in alloy structural steel has significant effects on its performance,making the detection of Mo content in alloy structural steel of great significance.However,the spectral interference and self-absorption effects of matrix element(Fe)in alloy structural steel severely affect the accuracy of laser-induced breakdown spectroscopy(LIBS)for quantitative analysis of Mo element.In this work,we employed laser-induced fluorescence-assisted laser-induced breakdown spectroscopy(LIBS-LIF)to address these issues.We selected three spectral lines,Mo I 379.83 nm,Mo I 386.41 nm,and Mo I 390.30 nm,as the analysis lines.The results showed that LIBS-LIF enhanced the spectral intensities of the three analysis lines,eliminating spectral interferences.As the Mo content increased from 0.019 wt.%to 1.4 wt.%,the spectral intensities of Mo element lines also significantly increased.Compared to the traditional LIBS technique,the self-absorption factor of the Mo I 386.41 nm line decreased by 99.99%in LIBS-LIF,the root mean square error of cross-validation decreased by 65.37%,the average relative deviation decreased by 85.69%,and the average relative standard deviation decreased by 20.20%.Therefore,LIBS-LIF can effectively reduce spectral interferences and self-absorption effects,improving the accuracy of quantitative analysis.

关 键 词：激光诱导击穿光谱 激光诱导荧光 合金结构钢 钼元素 

分 类 号：TG142.33[一般工业技术—材料科学与工程] O657.38[金属学及工艺—金属材料]