Journal
OPTIK
Volume 165, Issue -, Pages 87-93Publisher
ELSEVIER GMBH, URBAN & FISCHER VERLAG
DOI: 10.1016/j.ijleo.2018.03.125
Keywords
Laser induced breakdown; Optimization of experimental parameters; Elements; Soil
Categories
Funding
- Fundamental Research Funds for the Central Universities [2016YQ11, 2016MS134, 2017MS198]
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The experimental parameters for observing the characteristic of laser induced breakdown (LIB) plasma are optimized in the atmospheric environment. It shows that when the laser pulse energy is 21 mJ, the focal length of lens is 15 cm and the sample is 2 mm in front of the lens focus, the spectral intensity and the ratio of signal to noise (SBR) of LIB plasma are highest. It is helpful to improve the detection accuracy of the technique of laser induced breakdown spectroscopy (LIBS). The LIB spectra of a special soil samples are observed with the optimized parameters. The elements Fe, Mn, Ca, W, Co, Ti, Si, Cr and V contained in the soil sample are determined based on the spectral peaks. The electron temperature in plasma and the quantities of Mn, Ca in the soil are obtained further. (C) 2018 Elsevier GmbH. All rights reserved.
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