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Laser-induced breakdown spectroscopy combined with spatial heterodyne spectroscopy

  • A spatial heterodyne spectrometer (SHS) is tested for the first time in combination with laser-induced breakdown spectroscopy (LIBS). The spectrometer is a modified version of the Michelson interferometer in which mirrors are replaced by diffraction gratings. The SHS contains no moving parts and the gratings are fixed at equal distances from the beam splitter. The main advantage is high throughput, about 200 times higher than that of dispersive spectrometers used in LIBS. This makes LIBS-SHS a promising technique for low-light standoff applications. The output signal of the SHS is an interferogram that is Fourier-transformed to retrieve the original plasma spectrum. In this proof-of-principle study, we investigate the potential of LIBS-SHS for material classification and quantitative analysis. Brass standards with broadly varying concentrations of Cu and Zn were tested. Classification via principal component analysis (PCA) shows distinct groupings of materials according to theirA spatial heterodyne spectrometer (SHS) is tested for the first time in combination with laser-induced breakdown spectroscopy (LIBS). The spectrometer is a modified version of the Michelson interferometer in which mirrors are replaced by diffraction gratings. The SHS contains no moving parts and the gratings are fixed at equal distances from the beam splitter. The main advantage is high throughput, about 200 times higher than that of dispersive spectrometers used in LIBS. This makes LIBS-SHS a promising technique for low-light standoff applications. The output signal of the SHS is an interferogram that is Fourier-transformed to retrieve the original plasma spectrum. In this proof-of-principle study, we investigate the potential of LIBS-SHS for material classification and quantitative analysis. Brass standards with broadly varying concentrations of Cu and Zn were tested. Classification via principal component analysis (PCA) shows distinct groupings of materials according to their origin. The quantification via partial least squares regression (PLS) shows good precision (relative standard deviation , 10%) and accuracy (within 6 5% of nominal concentrations). It is possible that LIBS-SHS can be developed into a portable, inexpensive, rugged instrument for field applications.zeige mehrzeige weniger

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Metadaten
Autoren/innen:Igor B. Gornushkin, B.W. Smith, Ulrich Panne, N. Omenetto
Dokumenttyp:Zeitschriftenartikel
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Applied spectroscopy
Jahr der Erstveröffentlichung:2014
Organisationseinheit der BAM:P Präsidium
1 Analytische Chemie; Referenzmaterialien
P Präsidium / P.0 Präsident und Vizepräsident
1 Analytische Chemie; Referenzmaterialien / 1.0 Abteilungsleitung und andere
Verlag:Society for Applied Spectroscopy
Verlagsort:Frederick, Md.
Jahrgang/Band:68
Ausgabe/Heft:9
Erste Seite:1076
Letzte Seite:1084
Freie Schlagwörter:Fourier transform spectroscopy; Interferometry; LIBS; Laser-induced breakdown spectroscopy; Laser-induced plasma; Spatial heterodyne spectroscopy
DOI:https://doi.org/10.1366/14-07544
ISSN:0003-7028
ISSN:1943-3530
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:20.02.2016
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:08.12.2014