Spectra-assisted laser focusing in quantitative analysis of laser-induced breakdown spectroscopy for copper alloys  

作　　者：李守杰 郑荣儿 出口祥啓 叶旺全 田野 郭金家 李颖 卢渊 Shoujie LI;Ronger ZHENG;Yoshihiro DEGUCHI;Wangquan YE;Ye TIAN;Jinjia GUO;Ying LI;Yuan LU(College of Physics and Optoelectronic Engineering,Ocean University of China,Qingdao 266100,People’s Republic of China;Graduate School of Advanced Technology and Science,Tokushima University,Tokushima 770-8501,Japan)

机构地区：[1]College of Physics and Optoelectronic Engineering,Ocean University of China,Qingdao 266100,People’s Republic of China [2]Graduate School of Advanced Technology and Science,Tokushima University,Tokushima 770-8501,Japan

出　　处：《Plasma Science and Technology》2023年第4期204-209,共6页等离子体科学和技术（英文版）

基　　金：financially supported by the Provincial Key Research and Development Program of Shandong,China(No.2019GHZ010);the Natural Science Foundation of Shandong Province(No.ZR2020MF123);National Natural Science Foundation of China(Nos.61975190 and12174359);the Fundamental Research Funds for the Central Universities(No.202161002)。

摘　　要：Laser-induced breakdown spectroscopy(LIBS)is a capable technique for elementary analysis,while LIBS quantitation is still under development.In quantitation,precise laser focusing plays an important role because it ensures the distance between the laser and samples.In the present work,we employed spectral intensity as a direct way to assist laser focusing in LIBS quantitation for copper alloys.It is found that both the air emission and the copper line could be used to determine the position of the sample surface by referencing the intensity maximum.Nevertheless,the fine quantitation was only realized at the position where the air emission(e.g.O(I)777.4 nm)reached intensity maximum,and also in this way,a repeatable quantitation was successfully achieved even after 120 days.The results suggested that the LIBS quantitation was highly dependent on the focusing position of the laser,and spectra-assisted focusing could be a simple way to find the identical condition for different samples’detection.In the future,this method might be applicable in field measurements for LIBS analysis of solids.

关 键 词：LIBS laser focusing spectra assistance quantitative analysis copper alloys 

分 类 号：O657.38[理学—分析化学]