[1] [1] F Brech, L Cross. Optical microemission stimulated by a ruby laser［J］. Appl Spectrosc, 1962, 16(2): 59-64.

[2] [2] M Dell′Aglio, R Gaudiuso, G S Senesi, et al.. Monitoring of Cr, Cu, Pb, V and Zn in polluted soils by laser induced breakdown spectroscopy (LIBS)［J］. J Environmental Monitoring, 2011, 13(5): 1422-1426.

[3] [3] X Y Pu, W Y Ma, N H Cheung. Sensitive elemental analysis of aqueous colloids by laser-induced plasma spectroscopy［J］. Applied physics letters, 2003, 83(16): 3416-3418.

[4] [4] Lu Cuiping, Liu Wenqing, Zhao Nanjing, et al.. Quantitative analysis of chrome in soil samples using laser-induced breakdown spectroscopy［J］. Acta Physica Sinica, 2011, 60(4): 045206.

[5] [5] Y Dikmelik, C McEnnis, J B Spicer. Femtosecond and nanosecond laser-induced breakdown spectroscopy of trinitrotoluene［J］. Opt Express, 2008,16(8): 5332-5337.

[6] [6] D A Cremers, L J Radziemski, T R Loree. Spectrochemical analysis of liquids using the laser spark［J］. Applied spectroscopy, 1984, 38(5): 721-729.

[7] [7] J Uebbing, J Brust, W Sdorra, et al.. Reheating of a laser-produced plasma by a second pulse laser［J］. Applied spectroscopy, 1991, 45(9): 1419-1423.

[8] [8] R Sattmann, V Sturm, R Noll. Laser-induced breakdown spectroscopy of steel samples using multiple Q-switch NdYAG laser pulses［J］. J Physics D: Applied Physics, 1995, 28(10): 2181.

[9] [9] L St-Onge, V Detalle, M Sabsabi. Enhanced laser-induced breakdown spectroscopy using the combination of fourth-harmonic and fundamental NdYAG laser pulses［J］. Spectrochimica Acta Part B: Atomic Spectroscopy, 2002, 57(1): 121-135.

[10] [10] Wang Qi, Dong Fengzhong, Liang Yunxian, et al.. Experimental comparison investigation on emission spectral of reheating double and single pulses laser-induced Fe plasmas［J］. Acta Optica Sinica, 2011, 31(10): 1030002.

[11] [11] R Ahmed, M A Baig. A comparative study of single and double pulse laser induced breakdown spectroscopy［J］. J Applied Physics, 2009, 106(3): 033307.

[12] [12] R Sanginés, H Sobral, E A Zauco. The effect of sample temperature on the emission line intensification mechanisms in orthogonal double-pulse laser induced breakdown spectroscopy［J］. Spectrochimica Acta Part B: Atomic Spectroscopy, 2012, 68(10): 40-45.

[13] [13] L B Guo, W Hu, B Y Zhang, et al.. Enhancement of optical emission from laser-induced plasmas by combined spatial and magnetic confinement［J］. Opt Express, 2011, 19(15): 14067-14075.

[14] [14] B Rashid, R Ahmed, R Ali, et al.. A comparative study of single and double pulse of laser induced breakdown spectroscopy of silver［J］. Physics of Plasmas, 2011, 18(7): 073301.

[15] [15] H Sobral, M Villagrán, G R Navarro, et al.. Temporal evolution of the shock wave and hot core air in laser induced plasma［J］. Appl Phys Lett, 2000, 77(20): 3158-3160.