Abstract：The analytical performance of laser ignition assisted spark-induced breakdown spectroscopy (LI-SIBS) for the analysis of trace metal in aluminum alloy was reported in the present article. In order to improve the analytical performance of spark-induced breakdown spectroscopy, a low energy laser pulse was focused on the surface of the sample to produce plasma between discharge electrodes to trigger high voltage spark discharge. Under current geometrical arrangement, optimized discharge voltage and capacitance were determined, and copper in aluminum alloy was analyzed under optimized experimental condition. The limit of detection of copper in aluminum alloy was determined to be 0.7 ppm. Both signal stability and measurement accuracy for spark-induced breakdown spectroscopy were improved with the assistance of laser ignition. The discharge voltage could be reduced and the spatial resolution could be improved with the assistance of laser ignition at the same time. It was demonstrated that LI-SIBS has the characteristics of high sensitivity, good stability and better spatial resolution and is suitable for trace elements analysis in different alloys.
[1] Walters J P. Science, 1977, 198: 787. [2] Doucet F R, Belliveau T F, Fortier J L, et al. Journal of Analytical Atomic Spectrometry, 2004, 19: 499. [3] Wienold J, Traub H, Lange B, et al. Journal of Analytical Atomic Spectrometry, 2009, 24: 1570. [4] Tsai S J J, Chen S Y, Chang Y S, et al. Analytical Chemistry, 2006, 78(21): 7432. [5] Goueguel C, Lavilie S, Vidal F, et al. Journal of Analytical Atomic Spectrometry, 2011, 26(12): 2452. [6] Kim D E, Yoo K J, Park H K, et al. Applied Spectroscopy, 1997, 51(1): 22. [7] Li H K, Liu M, Chen Z J, et al. Transactions of Nonferrous Metals Society of China, 2008, 18(1): 222. [8] Cristoforetti G, Legnaioli S, Palleschi V, et al. Journal of Analytical Atomic Spectrometry, 2006, 21(7): 697. [9] Hunter A J R, Wainner R T, Piper L G, et al. Applied Optics, 2003, 42(12): 2102. [10] Khalaji M, Roshanzadeh B, Mansoori A, et al. Optics and Lasers in Engineering, 2012, 50: 110. [11] Hunter A J R, Morency J R, Senior C L, et al. Journal of the Air & Waste Management Association, 2000, 50(1): 111. [12] Nassef O A, Elsayed-Ali H E. Spectrochimica Acta Part B, 2005, 60: 1564. [13] Zhou W D, Li K X, Shen Q M, et al. Optics Express, 2010, 18(3): 2573. [14] Chen Y Q, Zhang Q, Li G, et al. Journal of Analytical Atomic Spectrometry, 2010, 25: 1969. [15] Chen Z J, Li H K, Zhao F, et al. Journal of Analytical Atomic Spectrometry, 2008, 23: 871.
