激光诱导击穿光谱法分析玻璃成分的实验研究  

Experimental Investigation on Quantitative Analysis of Glass by Laser Induced Breakdown Spectroscopy

作　　者：李鹏艳[1] 谢承利[1] 陆继东[1] 林兆祥[2] 李捷[1] 杨立飞[1] 

机构地区：[1]华中科技大学煤燃烧国家重点实验室,湖北武汉430074 [2]中南民族大学电信学院,湖北武汉430074

出　　处：《应用激光》2009年第1期21-25,共5页Applied Laser

基　　金：国家自然科学基金项目(项目编号:50576029)

摘　　要：对用激光诱导击穿光谱方法分析玻璃样品成分进行了实验研究,采用自由定标计算方法定量分析了玻璃样品的成分。通过实验的对比表明,在多元素同步分析时,光谱采样的延迟时间与门宽均设置为1.0μs时光谱分析效果较好。激光脉冲的聚焦点位于样品表面之上3mm时,发射光谱的稳定性与强度综合性能最优。实验结果表明,在实验设置的观测时间段内等离子体平均温度为12774K,定量分析的相对误差在3.6%～11.2%之间,相对标准偏差在1.6%～7.7%之间,重复试验的稳定性很好。Experimental investigation of quantitative analysis of glass by calibration-free laser induced breakdown spectroscopy （CF LIBS） was carried out in this paper. An intense laser radiation with a wavelength of 1064nm was used to ablate fine glass to form plasma plume, and the emission spectrum emitted as the plasma cooling off was analyzed by high resolution echelle grating spectrometer coupled to Intensified Charge Coupled Device （ICCD） camera. The results show that the intensity and repeatability of spectrum is best on the condition of laser pulse focused above the surface of sample, and in this experiment the height is about 3 mm. By the CF-LIBS, the relative errors of quantitative analysis of elements in glass varied between 3.6% 11.2 %, and good repeatability with relative standard deviation between 1.6 %- 7.7 %for five measurements was obtained.

关 键 词：激光诱导击穿光谱 玻璃 自由定标 定量分析 

分 类 号：O657.38[理学—分析化学]