Study on parameters influencing analytical performance of laser-induced breakdown spectroscopy

作     者：Yong Zhang Yun-Hai Jia Jin-Wen Chen Xue-Jing Shen Lei Zhao Chun Yang Yong-Yan Chen Yong-Hui Zhang Peng-Cheng Han 

作者机构：National Analysis Center for Iron and SteelCentral Iron&Steel Research InstituteBeijing 100081China 

出 版 物：《Frontiers of physics》 (物理学前沿（英文版）)

年 卷 期：2012年第7卷第6期

页      面：714-720页

核心收录：

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0817[工学-化学工程与技术] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 081701[工学-化学工程] 0803[工学-光学工程] 

基　　金：supported by the Spe- cial Fund of National Important Instrument 

主　　题：laser-induced breakdown spectroscopy (LIBS) analytical performance plasma diagno- sis plasma shielding 

摘      要：Lens-to-sample distances, delay time, atmospheric condition, laser pulse energy, etc. had obvious effects on the analytical performance of laser-induced breakdown spectroscopy. In this paper, these parameters are investigated in greater detail and we will explain how they have influences on the analytical performance. The results show that the focal plane under the sample surface can improve precision and detection limit, and the delay time should be decided according to sensitivity and accuracy. Spectral line intensity is stronger in argon than helium, nitrogen and air gas environment. Pulse energy should exceed energy threshold （about 50 m J） which can generate plasma, and the energy should not exceed about 300 mJ to avoid plasma shielding. Under optimum parameters, concentration relative standard deviation of C, Si, Mn, P, S, Ni, and Cr for low-alloyed steel （sample number 11278） which were measured 11 times is 2.37%, 2.18%, 2.23%, 7.8%, 9.34%, 1.92%, and 2.13%, respectively. And the detection limit of C, Si, Mn, P, S, Ni, and Cr for pure steel is 0.0045%, 0.0072%, 0.0069%, 0.0027%, 0.0024%, 0.0047%, and 0.0024%, respectively.