Title of article :
Forensic comparative glass analysis by laser-induced breakdown spectroscopy
Author/Authors :
Bridge، نويسنده , , Candice M. and Powell، نويسنده , , Joseph and Steele، نويسنده , , Katie L. and Sigman، نويسنده , , Michael E.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Pages :
7
From page :
1419
To page :
1425
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.
Keywords :
Forensic analysis , LIBS comparative glass analysis , LA-ICP-MS
Journal title :
Spectrochimica Acta Part B Atomic Spectroscopy
Serial Year :
2007
Journal title :
Spectrochimica Acta Part B Atomic Spectroscopy
Record number :
1687119
Link To Document :
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