[1] Styszko-Grochowiak K, Gola J, Jankowski H, et al. Characterization of the coal fly ash for the purpose of improvement of industrial on-line measurement of unburned carbon content ［J］. Fuel, 2004, 83(13): 1847-1853.

[2] Toh Y, Oshima M, Koizumi M, et al. Analysis of cadmium in food by multiple prompt γ-ray spectroscopy ［J］. Appl. Radiat. Isot., 2006, 64(7): 751-754.

[3] Liang Yunxian, Chen Xinglong, Wang Qi, et al. Quantitative analysis of Ca and Mg in slag with artificial neural networks ［J］. Journal of Atmospheric and Environmental Optics, 2012, 7(2): 124-130(in Chinese).

[4] Whitehouse A I, Young J, Botheroyd I M, et al. Remote material analysis of nuclear power station steam generator tubes by laser-induced breakdown spectroscopy ［J］. Spectrochim. Acta Part B, 2001, 56(6): 821-830.

[5] Rai A K, Zhang H, Yueh F Y, et al. Parametric study of a fiber-optic laser-induced breakdown spectroscopy probe for analysis of aluminum alloys ［J］. Spectrochim. Acta Part B, 2001, 56(12): 2371-2383.

[6] Kumar A, Yueh F Y, Miller T, et al. Detection of trace elements in liquids by laser-induced breakdown spectroscopy with a meinhard nebulizer ［J］. Appl. Opt., 2003, 42(30): 6040-6046.

[7] Yin W B, Zhang L, Dong L, et al. Design of a laser-induced breakdown spectroscopy system for on-line quality analysis of pulverized coal in power plants ［J］. Appl. Spectrosc., 2009, 63(8): 865-872.

[8] Zhang L, Ma W G, Dong L, et al. Development of an apparatus for on-line analysis of unburned carbon in fly ash using laser-induced breakdown spectroscopy (LIBS) ［J］. Appl. Spectrosc., 2011, 65(7): 790-796.

[9] Hu Zhiyu, Zhang Lei, Ma Weiguang, et al. Analysis of software for identifying spectral line of laser-induced breakdown spectroscopy based on LabVIEW ［J］. Spectroscopy and Spectral Analysis, 2012, 32(3): 602-605(in Chinese).

[10] Body D, Chadwick B L. Optimization of the spectral data processing in a LIBS simultaneous elemental analyses system ［J］. Spectrochim. Acta Part B, 2001, 56(6): 725-736.

[11] Dudragne L, Adam P, Amouroux J. Time-resolved laser-induced breakdown spectroscopy: application for qualitative and quantitative detection of F, Cl, S, and C in air ［J］. Appl. Spectrosc., 1998, 52(10): 1321-1327.

[12] Obernberger I, Thek G. Physical characterisation and chemical composition of densified biomass fuels with regard to their combustion behavior ［C］. Proceedings of the lst World Conference on Pallets, 2002: 115-122.

[13] Ottesen D K, Baxter L L, Radziemski L J, et al. Laser spark emission spectroscopy for in-situ, real-time monitoring of pulverized coal particle composition ［J］. Energ. Fuel., 1991, 5(2): 304-312.

[14] Krasniker R, Bulatov V, Schechter I. Study of matrix effects in laser plasma spectroscopy by shock wave propagation ［J］. Spectrochim. Acta Part B, 2001, 56(6): 609-618.

[15] Vrenegor J, Noll R, Sturm V. Investigation of matrix effects in laser-induced breakdown spectroscopy plasmas of high-alloy steel for matrix and minor elements ［J］. Spectrochim. Acta Part B, 2005, 60(7-8): 1083-1091.

[16] Laville S, Sabsabi M, Doucet F R. Multi-elemental analysis of solidified mineral melt samples by laser-induced breakdown spectroscopy coupled with a linear multivariate calibration ［J］. Spectrochim. Acta Part B, 2007, 62(12): 1557-1566.

[17] NIST Atomic Spectra Database ［OL］. http:// physics.nist.gov/PhysRefData/ASD/lines- form. html.