Abstract：The purpose of this research is to study the influence of double pulse laser induced breakdown spectroscopy (DP-LIBS) on the sensitivity of Cu in water. The water solution of Cu was tested by collinear DP-LIBS in this article. The results show that spectral intensity of Cu can be enhanced obviously by DP-LIBS, compared with single pulse laser induced breakdown spectroscopy (SP-LIBS). Besides, the experimental results were significantly impacted by delay time between laser pulse and spectrometer acquisition, delay time of double laser pulse and energy of laser pulse and so on. The paper determined the best conditions for DP-LIBS detecting Cu in water. The optimal acquisition delay time was 1 380 ns. The best laser pulse delay time was 25 ns. The most appropriate energy of double laser pulse was 100 mJ. Characteristic analysis of spectra of Cu at 324.7 and 327.4 nm was done for quantitative analysis. The detection limit was 3.5 μg·mL-1 at 324.7 nm, and the detection limit was 4.84 μg·mL-1 at 327.4 nm. The relative standard deviation of the two characteristic spectral lines was within 10%. The calibration curve of characteristic spectral line, established by 327.4 nm, was verified with 500 μg·mL-1 sample. Concentration of the sample was 446 μg·mL-1 calculated by the calibration curve. This research shows that the detection sensitivity of Cu in water can be improved by DP-LIBS. At the same time, it had high stability.
郑美兰，姚明印，陈添兵，林永增，黎文兵，刘木华* . 共线DP-LIBS定量分析水中Cu含量的试验研究 [J]. 光谱学与光谱分析, 2014, 34(07): 1954-1958.
ZHENG Mei-lan, YAO Ming-yin, CHEN Tian-bing, LIN Yong-zeng, LI Wen-bing, LIU Mu-hua* . Quantitative Analysis of Cu in Water by Collinear DP-LIBS . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(07): 1954-1958.
[1] DONG Mei-rong, LU Ji-dong, LI Jun, et al(董美蓉，陆继东，李 军，等) . Acta Optica Sinica(光学学报)，2011，31(1)：0130002. [2] Roberts D E, du Plessis A, Steyn J, et al. Spectrochimica Acta B, 2012, 73: 48. [3] ZHANG Da-cheng, MA Xi-wen, ZHU Xiao-long, et al(张大成，马新文，朱小龙, 等). Acta Physic Sinica(物理学报), 2008, 57(10): 6348. [4] CHANG Liang, LIN Zhao-xiang, LI Jie, et al(常 亮，林兆祥，李 捷，等). High Power Laser and Particle Beams(强激光与粒子束), 2010, 22(6): 1369. [5] XU Yuan, YAO Ming-yin, LIU Mu-hua, et al(徐 媛，姚明印，刘木华，等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2012, 32(9): 2555. [6] YU Liang-ying, LU Ji-dong, CHEN Wen, et al(余亮英，陆继东，陈 文，等). Journal of Applied Optics(应用化学), 2006, 27(2): 147. [7] Cremers D A, Radziemski L J, Loree T R. Appl. Spectrosc., 1984, 38: 721. [8] Kuwako A, Uchida Y, Maeda K. Applied Optics, 2003, 42(30): 6052. [9] Koch S, Court R, Garen W, et al. Spectrochimica Acta Part B, 2005, 60: 1230. [10] Giacomo A D, Dell’Aglio M, Pascale O D, et al. Spectrochimica Acta Part B, 2007, 62: 721. [11] ZHANG Qiao, HU Zhen-hua, DING Lei, et al(张 巧，胡振华，丁 蕾，等). Chinese J. Laser(中国激光), 2013, 40(2): 0215002. [12] WANG Qi, LIANG Yun-xian, DONG Feng-zhong, et al(王 琦，梁云仙，董凤忠，等). Chinese J. Laser(中国激光), 2011, 38(12): 1215001. [13] LI Min, ZHU Xin-yong, YAO Ming-yin, et al(李 敏，朱心勇，姚明印，等). Laser & Optoelectronics Progress(激光与光电子学进展), 2013, 50: 013001.
