Laser-induced breakdown spectroscopy (LIBS) technique for the determination of the chemical composition of complex inorganic materials

Łukasz Łazarek; Arkadiusz J. Antończak; Michał R. Wójcik; Paweł E. Kozioł; Bogusz Stępak; Krzysztof M. Abramski

doi:10.1117/12.2063367

22 August 2014 Laser-induced breakdown spectroscopy (LIBS) technique for the determination of the chemical composition of complex inorganic materials

Łukasz Łazarek, Arkadiusz J. Antończak, Michał R. Wójcik, Paweł E. Kozioł, Bogusz Stępak, Krzysztof M. Abramski

Author Affiliations +

Proceedings Volume 9286, Second International Conference on Applications of Optics and Photonics; 92863E (2014) https://doi.org/10.1117/12.2063367
Event: Second International Conference on Applications of Optics and Photonics, 2014, Aveiro, Portugal

Abstract

Laser-induced breakdown spectroscopy (LIBS) is a fast, fully optical method, that needs little or no sample preparation. In this technique qualitative and quantitative analysis is based on comparison. The determination of composition is generally based on the construction of a calibration curve namely the LIBS signal versus the concentration of the analyte. Typically, to calibrate the system, certified reference materials with known elemental composition are used. Nevertheless, such samples due to differences in the overall composition with respect to the used complex inorganic materials can influence significantly on the accuracy. There are also some intermediate factors which can cause imprecision in measurements, such as optical absorption, surface structure, thermal conductivity etc. This paper presents the calibration procedure performed with especially prepared pellets from the tested materials, which composition was previously defined. We also proposed methods of post-processing which allowed for mitigation of the matrix effects and for a reliable and accurate analysis. This technique was implemented for determination of trace elements in industrial copper concentrates standardized by conventional atomic absorption spectroscopy with a flame atomizer. A series of copper flotation concentrate samples was analyzed for contents of three elements, that is silver, cobalt and vanadium. It has been shown that the described technique can be used to qualitative and quantitative analyses of complex inorganic materials, such as copper flotation concentrates.

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Łukasz Łazarek, Arkadiusz J. Antończak, Michał R. Wójcik, Paweł E. Kozioł, Bogusz Stępak, and Krzysztof M. Abramski "Laser-induced breakdown spectroscopy (LIBS) technique for the determination of the chemical composition of complex inorganic materials", Proc. SPIE 9286, Second International Conference on Applications of Optics and Photonics, 92863E (22 August 2014); https://doi.org/10.1117/12.2063367

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KEYWORDS

Laser induced breakdown spectroscopy

Calibration

Copper

Silver

Chemical elements

Chemical analysis

Cobalt

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