| 光谱学与光谱分析 |
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| Microelements in Potato and Lily Samples Studied by Laser-Induced Breakdown spectroscopy Technology |
| ZHANG Da-cheng1,2,MA Xin-wen1*,ZHU Xiao-long1,LI Bin1, 2,ZU Kai-ling1 |
1. Institute of Modern Physics, the Chinese Academy of Sciences, Lanzhou 730000, China
2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China |
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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.
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Received: 2007-11-16
Accepted: 2008-02-20
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Corresponding Authors:
MA Xin-wen
E-mail: dch-zhang@impcas.ac.cn, aezdc@163.com
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