期刊
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
卷 64, 期 9, 页码 899-904出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.sab.2009.07.019
关键词
Laser-induced breakdown spectroscopy; Double laser pulse; Spark discharge; Optical emission; Spectral line; Ablation plasma; Soil; Carbon
类别
资金
- Management of the State Research Program
- Belarusian Republic Foundation
The potentials of two advanced laser-induced breakdown spectroscopy (LIBS) techniques which are used to determine the total carbon content in soils have been examined. The first one is the combination of a single-pulse laser ablation with spark excitation of plasma plume triggering the gap between electrodes close to the target surface. The second one is a more conventional double-pulse LIBS. In both modes the calibration graphs have a nonlinear trend in the actual range of carbon contents and present a good R-2 value (0.97). In the combined laser-spark approach, using low-cost and portable laser instrumentation is possible, as well as inducing a micro-damage on the target surface. Certain regularities in the spectral line intensities of soil nutritious elements have been detected and appear to be connected to the total carbon content and to the soil origin. (C) 2009 Elsevier B.V. All rights reserved.
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