Development of a laser-induced breakdown spectroscopy method for soil and ecological analysis (review) |
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Authors: | V S Burakov S N Raikov N V Tarasenko M V Belkov and V V Kiris |
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Institution: | (1) Analytical Laboratory, Lithuanian Institute of Agriculture, Instituto al.1, 5051 Dotnuva, Akademija, Kedainiai District, Lithuania |
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Abstract: | The application of laser spectrochemical analysis to testing for basic compounds and nutritious/toxic elements in soil has
been reviewed. A combined laser-spark approach has been applied for the rapid measurement of the carbon content in soil. Spectra
have been excited both directly in a laser-ablation plume and by passing a pulsed electric discharge through the plume. The
emission spectrum intensity in the combined plasma is considerably higher. The application of a complex of methods to carbon
determination in soil has shown that in fact the data on the humus content usually obtained in agrochemical practice by a
conventional method of carbon oxidation by potassium dichromate need to be corrected taking into account the possibility of
incomplete oxidation of organic matter in soil. The efficiency of various double-pulse LIBS applications has been demonstrated
in solving a number of environmental problems such as the determination of heavy and toxic metals in soil and the detection
of sulfur in coal. The instrumentation and analytical procedures have been proposed and optimized for rapid control of the
chlorine content in plant samples. The technique can be easily extended to ecological monitoring of toxic elements and heavy
metals in any biogenic material. |
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