Title

Forensic Comparative Glass Analysis By Laser-Induced Breakdown Spectroscopy

Keywords

Forensic analysis; LA-ICP-MS; LIBS comparative glass analysis

Abstract

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. © 2007 Elsevier B.V. All rights reserved.

Publication Date

12-1-2007

Publication Title

Spectrochimica Acta - Part B Atomic Spectroscopy

Volume

62

Issue

12

Number of Pages

1419-1425

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.sab.2007.10.015

Socpus ID

36749090668 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/36749090668

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