显微激光诱导击穿光谱技术对低合金钢中Mn的定量检测

发布时间：2018-11-03 15:18

【摘要】：采用显微激光诱导击穿光谱技术对低合金钢标准样品进行定量分析,空间分辨率达到20μm,单脉冲检测极限(LoD)为0.10%。根据谱线强度和元素浓度的关系获得Mn元素的基本定标曲线,定标曲线的拟合度系数R~2为0.97,采用去一交互验证法预测了样品中Mn元素的浓度,七个样品的平均预测误差为12.91%,去一交互验证均方根误差为0.11%。采用内标法时定标曲线的拟合度系数R~2为0.99,七个样品的平均预测误差为7.25%,去一交互验证均方根误差为0.07%。实验结果表明显微激光诱导击穿光谱技术能有效应用于物质微区元素的高精度定性、定量分析。
[Abstract]:The microlaser-induced breakdown spectroscopy was used to quantitatively analyze the standard samples of low alloy steel. The spatial resolution was 20 渭 m and the limit (LoD) of monopulse detection was 0.10 渭 m. The basic calibration curve of Mn element was obtained according to the relationship between spectral line strength and element concentration. The fitting coefficient of calibration curve R _ (2) was 0.97. The concentration of Mn element in the sample was predicted by de-cross validation method. The average prediction error of seven samples is 12.91, and the root mean square error of cross-validation is 0.11. The fitting coefficient of calibration curve is 0.99, the average prediction error of seven samples is 7.25, and the root mean square error of cross-validation is 0.07. The experimental results show that the micro-laser-induced breakdown spectroscopy can be effectively applied to the high precision qualitative and quantitative analysis of the elements in the material microregion.
【作者单位】：华中科技大学武汉光电国家实验室(筹)激光与太赫兹功能实验室;
【基金】：国家重大科学仪器设备开发专项(2011YQ160017) 中国博士后科学基金项目(2013M542014) 中央高校基本科研业务费项目(CXY13Q021,CXY13Q022)资助
【分类号】：TG115.33

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