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手持式激光诱导击穿光谱仪对铝合金中镁钛元素的定量分析

Quantitative Analysis of Magnesium and Titanium Elements in Aluminum Alloy by Handheld Laser-Induced Breakdown Spectroscopy

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摘要

在常温常压下, 采用手持式激光诱导击穿光谱仪(LIBS)对铝合金中的镁、钛元素进行定量分析, 以验证其稳定性及可靠性。手持式LIBS内置1064 nm Nd∶YAG 脉冲激光器, 光路为反射式同轴结构。实验中采用AvaSpec-Mini 2048光谱仪, 测量波长范围为240~420 nm。选取镁元素在285.17、383.83 nm处的特征谱线, 钛元素在323.45、334.94 nm处的特征谱线, 结合偏最小二乘法建立定标曲线模型。同种元素在不同特征谱线下的定标曲线斜率接近, 线性相关系数R值均在0.9893及以上。测量结果与标准值具有较好的一致性, 测量值相对误差均在8.70%及以下, 样品中镁、钛元素检出限可达到10-4量级。说明手持式LIBS能够实现对铝合金中镁、钛元素的定量分析, 从而验证了手持式LIBS具有较好的稳定性和可靠性, 对LIBS便携化的发展具有十分重要的意义。

Abstract

Under normal temperature and pressure, the quantitative analysis of magnesium and titanium elements in aluminum alloy is carried out by handheld laser-induced breakdown spectroscopy (LIBS) to verify the instrument′s stability and reliability. The handheld LIBS has a built-in 1064 nm Nd:YAG pulsed laser with a reflective coaxial structure. The AvaSpec-Mini 2048 spectrometer with a measurement wavelength range of 240-420 nm is used in the experiment. The characteristic lines of magnesium element at 285.17 nm and 383.83 nm and those of titanium element at 323.45 nm and 334.94 nm are selected. Then the calibration curve model is established with the partial least square method. The slopes of calibration curves for the same element under different characteristic lines are close to each other, and the values of linear correlation coefficients R are all above 0.9893. Moreover, the measurement results have good consistency with the standard values, and the relative error is no more than 8.70%. The detection limits of magnesium and titanium elements in the samples can reach the level of 10-4. The handheld LIBS can be used to realize the quantitative analysis of magnesium and titanium elements in aluminum alloys and thus that the handheld LIBS has certain stable and reliable performances is verified, which is of great significance to the development of a portable LIBS.

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中图分类号:O433.4

DOI:10.3788/LOP56.023002

所属栏目:光谱学

基金项目:国家自然科学基金(61675098, 61107011)、江苏省自然科学基金(SBK2016022015)、江苏省科技项目(BE2015029)

收稿日期:2018-06-27

修改稿日期:2018-07-24

网络出版日期:2018-07-30

作者单位    点击查看

李婧御:南京理工大学电子工程与光电技术学院, 江苏 南京 210094
陈宽:南京先进激光技术研究院, 江苏 南京 210038
陈国飞:南京先进激光技术研究院, 江苏 南京 210038
李扬彦:南京理工大学电子工程与光电技术学院, 江苏 南京 210094
曾爱军:南京先进激光技术研究院, 江苏 南京 210038
辛煜:南京理工大学电子工程与光电技术学院, 江苏 南京 210094

联系人作者:辛煜(yxin@njust.edu.cn)

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引用该论文

Li Jingyu,Chen Kuan,Chen Guofei,Li Yangyan,Zeng Aijun,Xin Yu. Quantitative Analysis of Magnesium and Titanium Elements in Aluminum Alloy by Handheld Laser-Induced Breakdown Spectroscopy[J]. Laser & Optoelectronics Progress, 2019, 56(2): 023002

李婧御,陈宽,陈国飞,李扬彦,曾爱军,辛煜. 手持式激光诱导击穿光谱仪对铝合金中镁钛元素的定量分析[J]. 激光与光电子学进展, 2019, 56(2): 023002

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