Quantitative analysis of Mo in alloy structural steel using laser-induced fluorescence assisted laser-induced breakdown spectroscopy
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国家科技期刊平台
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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 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
国家科技期刊平台
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