摘要
本文采用激光诱导击穿光谱(LIBS)技术分别对具有不同成分和紧密度的岩石和煤样品进行分析。由波长为1 064 nm的Nd:YAG脉冲激光器,样品台和分辨率为0.1 nm的微光谱仪等器件组成一个小型激光诱导击穿光谱实验系统,通过计算机对光谱仪采集到的数据进行分析和处理。根据LIBS光谱图的特征谱线,对岩石和煤等样品中部分元素进行了定性分析,并对未知岩石样品进行了简单的分类;选用Si I谱线(251.6 nm),对标准岩石粉末样品的硅元素进行分析,发现谱线的相对强度和元素含量的对数值之间有很好的线性关系,由此可得到Si元素的定标曲线,并用于定量分析Si的含量,同样的方法也可分析样品中的其他元素。实验结果为采用激光诱导击穿光谱技术对物质成分进行快速检测和分析的可行性提供了依据。
Rock and coal samples with different elemental compositions and bulk densities were analyzed by laser-induced breakdown spectroseopic（LIBS）technique. The LIBS system was mainly made up of a pulsed Nd： YAG laser with an operating wavelength of 1 064 nm,a sample stage and a miniature spectrometer with a spectral resolution of 0. 1 nm. LIBS signals collected by the spectrometer were spectraliy resolved and processed by a computer. Through qualitative analysis , rock samples of unknown variety were simply classified on the basis of characteristic lines of some elements in the LIBS spectra. The Si I lines （251. 6 nm） were used to analyze silicon components in standard rock powder samples. A good logarithmic linearity between the relative spectral intensities and the element contents was found, which can serve as the calibration curve for Si to determine Si contents. Similar procedure can be applied to analyze other elements in the same sample. The experimental results pro- vide a basis for the feasibility of rapid detection and quantitative elemental analysis with the laser-induced breakdown spectroscopy.
出处
《冶金分析》
CAS
CSCD
北大核心
2009年第1期30-34,共5页
Metallurgical Analysis
关键词
激光诱导击穿光谱
元素分析
岩石
煤
laser-induced breakdown spectroscopy
elemental analysis
rock
coal
