Forensic comparative glass analysis by laser-induced breakdown spectroscopy
Abbreviated Journal Title
Spectroc. Acta Pt. B-Atom. Spectr.
LIBS comparative glass analysis; LA-ICP-MS; forensic analysis; ATOMIC EMISSION-SPECTROMETRY; PLASMA-MASS SPECTROMETRY; ICP-MS; DISCRIMINATING POWER; ELEMENTAL ANALYSIS; ABLATION; FRAGMENTS; PARAMETERS; Spectroscopy
Glass samples Of four types commonly encountered in forensic examinations have been analyzed by laser-induced breakdown spectroscopy (LIBS) for the purpose of discriminating between samples originating from different sources. Some of the glass sets were also examined by laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS). Refractive index (RI) measurements were also made on all glass samples and the refractive index data was combined with the LIBS and with the LA-ICP-MS data to enhance discrimination. The glass types examined included float glass taken from front and side automobile windows (examined on the non-float side), automobile headlamp glass, automobile side-mirror glass and brown beverage container glass. The largest overall discrimination was obtained by employing RI data in combination with LA-ICP-MS (98.8% discrimination of 666 pairwise comparisons at 95% confidence), while LIBS in combination with RI provided a somewhat lower discrimination (87.2% discrimination of 1122 pairwise comparisons at 95% confidence). Samples of side-mirror glass were less discriminated by LIBS due to a larger variance in emission intensities, while discrimination of side-mirror glass by LA-ICP-MS remained high. (C) 2007 Elsevier B.V. All rights reserved.
Spectrochimica Acta Part B-Atomic Spectroscopy
Article; Proceedings Paper
"Forensic comparative glass analysis by laser-induced breakdown spectroscopy" (2007). Faculty Bibliography 2000s. 6893.