Research on Parameters Optimization of Laser-Induced Breakdown Spectroscopy Based Experimental Device
ZHANG Lei, MA Wei-guang, YAN Xiao-juan, LI Zhi-xin, HU Zhi-yu, ZHANG Yong-zhi, WANG Le, DONG Lei, YIN Wang-bao*, JIA Suo-tang
State Key Laboratory of Quantum Optics and Quantum Optics Devices, College of Physics and Electronics Engineering, Shanxi University, Taiyuan 030006, China
Abstract：For a better application of laser-induced breakdown spectroscopy (LIBS) to coal quality analysis, it is necessary to optimize the key parameters of the experimental LIBS-based device. The relationships between the key parameters and the signal-to-noise ratios (S/N) of the elemental emission lines in the plasma spectrum of the pulverized coal were studied, according to which the optimal parameters can be selected. Experimental results indicate that the optimal settings for our LIBS-based device are laser pulse energy=120 mJ·Pulse-1, delay time of spectrometer=200 ns, laser focal point be located 3～5 mm underneath the sample surface, rotation speed of sample cell=2.7 rev·min-1, a narrow-band filter with center frequency of 1 064 nm and a diaphragm with center hole diameter of 1.5 mm be placed in the path of the laser beam. Quantitative analysis results of pulverized coal show that, by using the optimal LIBS-based device, the standard deviation (SD) of C has been reduced from 6.7% to 1.6%, while the relative standard deviation (RSD) of other trace elements has been reduced from 28% to 10%. As a result, the accuracy has been improved greatly.
Key words：Laser-induced breakdown spectroscopy;Signal-to-noise ratio of emission line;Parameters optimization;Pulverized coal;Plasma
张 雷，马维光，闫晓娟，李志新，胡志裕，张永智，王 乐，董 磊，尹王保*，贾锁堂. 激光诱导击穿光谱实验装置的参数优化研究[J]. 光谱学与光谱分析, 2011, 31(09): 2355-2360.
ZHANG Lei, MA Wei-guang, YAN Xiao-juan, LI Zhi-xin, HU Zhi-yu, ZHANG Yong-zhi, WANG Le, DONG Lei, YIN Wang-bao*, JIA Suo-tang. Research on Parameters Optimization of Laser-Induced Breakdown Spectroscopy Based Experimental Device. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2011, 31(09): 2355-2360.
[1] Zhang L, Dong L, Dou H P, et al. Appl. Spectrosc., 2008, 62(4): 458. [2] Yin W B, Zhang L, Dong L, et al. Appl. Spectrosc., 2009, 63(8): 865. [3] Benedetti P A, Cristoforetti G, Legnaioli S, et al. Spectrochim. Acta, 2005, 60(11): 1392. [4] Asimellis G, Giannoudakos A, Kompitsas M. Spectrochim. Acta, 2006, 61(12): 1253. [5] Carranza J E, Fisher B T, Yoder G D. Spectrochim. Acta, 2001, 56(6): 851. [6] ZHANG Da-cheng, MA Xin-wen, ZHU Xiao-long, et al(张大成，马新文，朱小龙，等). Acta Physica Sinica(物理学报), 2008, 57(10): 6348. [7] Radziemski L J, Cremers D A, Hoffman N M. Anal. Chem., 1983, 55(8): 1246. [8] Lithgow G A, Robinson A L, Buckley S G. Atmos. Environ., 2004, 38(20): 3319. [9] Wainner R T, Harmon R S, Miziolek A W, et al. Spectrochim. Acta, 2001, 56(6): 777. [10] Giacomo A De, Shakhatov V A, Pascale O De. Spectrochim. Acta, 2001, 56(6): 753. [11] CUI Zhi-feng, ZHANG Xian-yi, YAO Guan-xin, et al (崔执凤，张先燚，姚关心，等). Acta Physica Sinica (物理学报), 2006, 55(9): 4506. [12] Mukherjee D, Rai A, Zachariah M R. J. Aero. Sci., 2006, 37(6): 677. [13] Bassiotis I, Diamantopoulou A, Giannoudakos A, et al. Spectrochim. Acta, 2001, 56(6): 671. [14] Archambault J F, Vintiloìu A, Kwong E. AAPS Pharm. Sci. Tech., 2005, 6(2): 253. [15] Hilbk-Kortenbruck F, Noll R, Wintjens P, et al. Spectrochim. Acta, 2001, 56(6): 933. [16] LEI Yong-ping, SHI Yao-wu, ZHOU Jia-jin(雷永平，史耀武，周家谨). Chinese Journal of Lasers(中国激光), 1996, 23(4): 369. [17] GAO Xin, SONG Zhou-mo(高 昕，宋宙模). Infrared and Laser Engineering (红外与激光工程), 2000, 29(4): 62. [18] Kuzuya M, Aranami H. Spectrochim. Acta, 2000, 55(9): 1423.
