Forensic comparative glass analysis by laser-induced breakdown spectroscopy

    Authors

    C. M. Bridge; J. Powell; K. L. Steele;M. E. Sigman

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    Abbreviated Journal Title

    Spectroc. Acta Pt. B-Atom. Spectr.

    Keywords

    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

    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. (C) 2007 Elsevier B.V. All rights reserved.

    Journal Title

    Spectrochimica Acta Part B-Atomic Spectroscopy

    Volume

    62

    Issue/Number

    12

    Publication Date

    1-1-2007

    Document Type

    Article; Proceedings Paper

    Language

    English

    First Page

    1419

    Last Page

    1425

    WOS Identifier

    WOS:000252204500017

    ISSN

    0584-8547

    Share

    COinS