基于内标法的页岩中元素激光诱导击穿光谱定量分析  

Quantitative analysis of elements in shale by laser-induced breakdown spectroscopy based on internal standard method

作　　者：曹智 程军杰 孙昊瑞 李连顺 孙亚楼 陶柯宇 林庆宇[2] Cao Zhi;Cheng Junjie;Sun Haorui;Li Lianshun;Sun Yanlou;Tao Keyu;Lin Qingyu(The 404 Co.,Ltd.,CNNC,Jiayuguan 735100,China;School of Mechanical Engineering,Si-chuan University,Chengdu 610065,China)

机构地区：[1]中核四0四有限公司,中国核工业集团有限公司,嘉峪关735100 [2]四川大学机械工程学院,成都610065

出　　处：《分析仪器》2022年第4期16-19,共4页Analytical Instrumentation

基　　金：国家重大科学仪器设备开发专项(No.2011YQ030113)项目资助。

摘　　要：激光诱导击穿光谱技术(Laser Induced Breakdown Spectroscopy,LIBS)在元素快速定性测量上已被广泛应用,然而,因元素的LIBS信号不仅依赖激光器的参数,而且易受被测物质的物理化学性质和所处的环境等影响,在定量分析方法上还需进一步深入研究。借助自行搭建的LIBS系统,本实验对页岩粉末压片样品的测试条件进行了优化,重点考察了延迟时间、脉冲能量、脉冲次数、焦平面位置等因素对测试结果稳定性的影响,建立了实验室压片样品的内标法最佳测试条件,并将该方法应用在Mg元素的定量测试中,获得了满意的效果。Laser-induced breakdown spectroscopy(LIBS)is a relatively mature technology for qualitative measurement of elements. It requires further research on the quantitative analysis for the signal of a certain element is determined not only by the parameters of the laser power,but also by the properties of the samples and the environment. In this article,some factors that may have an influence on the test results such as delay time,pulse energy,numbers of the pulse and the location of the focal plane are studied. The best test conditions are obtained and the method is applied to the quantitative analysis of Mg.

关 键 词：激光诱导击穿光谱 页岩 内标法 定量分析 

分 类 号：O657.38[理学—分析化学]