1. Institute of Modern Physics, the Chinese Academy of Sciences, Lanzhou 730000, China 2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China
Abstract：A LIBS setup was built in the Institute of Modern Physics. In our experiments, LIBS spectra produced by infrared radiation of Nd∶YAG nanosecond laser with 100 and 150 mJ pulse energy, respectively, were measured by fiber optic spectrometer in the ranges of 230-430 nm and 430-1 080 nm with a delay time of 1.7 and gate width of 2 ms for potato and lily samples prepared by vacuum freeze-dried technique. The lines from different metal elements such as K, Ca, Na, Mg, Fe, Al, Mn and Ti, and nonmetal elements such as C, N, O and H, and some molecular spectra from C2, CaO, and CN were identified according to their wavelengths. The relative content of the six microelements, Ca, Na, K, Fe, Al, and Mg in the samples were analyzed according to their representative line intensities. By comparison we found that there are higher relative content of Ca and Na in lily samples and higher relative content of Mg in potato samples. The experimental results showed that LIBS technique is a fast and effective means for measuring and comparing the contents of microelements in plant samples.
[1] Baudelet M, Yu J, Jovelet J, et al. Appl. Phys. Lett., 2006, 89: 163903-1. [2] Mohamed W T Y. Optics & Laser Technology, 2007, 40(1): 30. [3] LI Jing, ZHANG Jian-qiu, LI Sheng-li(李 静, 张鉴秋, 李胜利). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2006, 26(12): 2324. [4] LI Jing, LIN Chang-he, LI Sheng-li(李 静, 林长贺, 李胜利). Spectroscopy and Spctral Analysis(光谱学与光谱分析), 2006, 26(5): 944. [5] De Giacomo A, Dell A M, Colao F, et al. Applied Surface Science, 2005, 247: 157. [6] Baudelet M, Guyon L, Yu J, et al. Appl. Phys. Lett., 2006, 88: 063901-1. [7] Baudelet M, Guyon L, Yu J, et al. Journal of Applied Physics, 2006, 99: 084701-1. [8] Munson C A, DeLucia Jr F C, Piehler T, et al. Spectrochimica Acta Part B, 2005, 60: 1217. [9] Samuels A C, DeLucia Jr F C, McNesby K L, et al. Applied Optics, 2003, 42(30): 6205. [10] Kumar A, Yueh F Y, Singh J P, et al. Applied Optics, 2004, 43(28): 5339. [11] LI Shu-bin(李淑斌). Chinese Journal of Spectroscopy Laboratory(光谱实验室), 2006, 23(6): 1194. [12] YANG Yi, HOU Xiang-yan, WANG Shu-jun, et al(杨 屹, 侯翔燕, 王书俊, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2004, 24(12): 1672. [13] LI Xiu-ping, LI Li-hua, ZHANG Jin-sheng(李秀萍, 李丽华, 张金生). Modern Instruments(现代仪器), 2005, 11(2): 27. [14] FAN Wen-xiu, LI Xin-zheng(范文秀, 李新峥). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2005, 25(10): 1714. [15] Myriam B, HAO Z Q, Baudelet M, et al. J. Chin. Phys. Lett., 2007, 24(12): 3466. [16] NIST.http://www.physics.nist.gov/PhysRefData/ASD/lines_form.html. [17] Morel S, Leone N, Adam P, et al. Applied Optics, 2003, 42(30): 6184. [18] Aragon C, Aguilera J A, Penalba F. Applied Spectroscopy, 1999, 53(10): 1259.
