Quantitative determination of element concentrations in industrial oxide materials by laser-induced breakdown spectroscopy

Calibration-free laser-induced breakdown spectroscopy (CF-LIBS) method is employed for quantitative determination of oxide concentrations in multi-component materials. Industrial oxide materials from steel industry are laser ablated in air, and the optical plasma emission is collected by spectromete...

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Bibliographic Details
Published in:Analytical and bioanalytical chemistry 2011-07, Vol.400 (10), p.3367-3375
Main Authors: Praher, B., Rössler, R., Arenholz, E., Heitz, J., Pedarnig, J. D.
Format: Article
Language:English
Subjects:
Analysis
Analytical Chemistry
Biochemistry
Breakdown
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Chromium
Density
Food Science
Iron oxides
Laboratory Medicine
Laser industry
Magnesium
Manganese
Mathematical analysis
Metallic elements
Monitoring/Environmental Analysis
Nonferrous metals
Original Paper
Oxides
Silicon
Spectrum analysis
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Summary:Calibration-free laser-induced breakdown spectroscopy (CF-LIBS) method is employed for quantitative determination of oxide concentrations in multi-component materials. Industrial oxide materials from steel industry are laser ablated in air, and the optical plasma emission is collected by spectrometers and gated detectors. The temperature and electron number density of laser-induced plasma are determined from measured LIBS spectra. Emission lines of aluminium (Al), calcium (Ca), iron (Fe), manganese (Mn), magnesium (Mg), silicon (Si), titanium (Ti), and chromium (Cr) of low self-absorption are selected, and the concentration of oxides CaO, Al 2 O 3 , MgO, SiO 2 , FeO, MnO, TiO 2 , and Cr 2 O 3 is calculated by CF-LIBS analysis. For all sample materials investigated, we find good match of calculated concentration values ( C CF ) with nominal concentration values ( C N ). The relative error in oxide concentration, e r  = | C CF  −  C N |/ C N , decreases with increasing concentration and it is e r  ≤ 100% for concentration C N  ≥ 1 wt.%. The CF-LIBS results are stable against fluctuations of experimental parameters. The variation of laser pulse energy over a large range changes the error by less than 10% for major oxides ( C N  ≥ 10 wt.%). The results indicate that CF-LIBS method can be employed for fast and stable quantitative compositional analysis of multi-component materials.
ISSN:1618-2642
1618-2650
DOI:10.1007/s00216-011-5000-9