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。
Quantitative analysis of Mo in alloy structural steel using laser-induced fluorescence assisted laser-induced breakdown spectroscopy
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 ele-ment.In this work,we employed laser-induced fluorescence-assisted laser-induced breakdown spectrosco-py(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.Com-pared 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.
laser-induced breakdown spectroscopylaser-induced fluorescencealloy structure steelmo-lybdenum element
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