摘要
利用激光诱导击穿光谱定量分析了铝合金中多种元素的成分。采用Nd∶YAG脉冲激光器,在空气环境下烧蚀铝合金固体样品获得等离子体。利用多通道光栅光谱仪和CCD检测器对200～980nm波长范围的光谱进行同时检测。研究了检测时延、激光脉冲能量、元素深度分布对光谱强度的影响,考虑这些因素之后对实验参数进行了优化。在优化的实验参数下对国家标准铝合金样品中的八种元素Si,Fe,Cu,Mn,Mg,Zn,Sn及Ni进行了定标,并利用定标曲线对一种铝合金样品进行了定量分析。实验结果表明,测量结果的相对标准偏差(RSD)最大为5.89%,相对误差在-20.99%～15%范围内,说明对铝合金样品成分进行定量分析,激光诱导击穿光谱是一种有效的光谱分析工具,但是分析结果的准确度仍需要提高。
The multielement components of some aluminium alloy samples were quantified by using laser-induced breakdown spectroscopy（LIBS）.The Nd∶YAG pulsed laser was used to produce plasma in ambient air.The spectral range of 200-980 nm was simultaneously obtained through a multichannel grating spectrometer and CCD detectors.The authors studied the influences of time delays,energy of the laser,and depth profile of elements in samples on spectral intensity,and optimized the experimental parameters based on the influence analysis.With the optimal experimental parameters,the authors made the calibration curves by four certified aluminum alloy samples for eight elements,Si,Fe,Cu,Mn,Mg,Zn,Sn,and Ni,and quantified the composition of an aluminum sample.The obtained maximum relative standard deviation（RSD）was 5.89%,and relative errors were-20.99%-15%.Experimental results show that LIBS is an effective technique for quantitative analysis of aluminum alloy samples,though the improved accuracy of the quantitative analysis is necessary.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2009年第12期3375-3378,共4页
Spectroscopy and Spectral Analysis
基金
国家高技术研究发展计划项目(2009AA04Z160)
中国科学院知识创新工程重要方向项目(KGCX2-YW-126)资助
关键词
激光诱导击穿光谱
铝合金
激光能量
检测时延
定量分析
Laser-induced breakdown spectroscopy Al alloy Laser energy Time delay Quantitative analysis
