Covariance mapping in the analysis of ignitable liquids by gas chromatography/mass spectrometry

Analytical Chemistry
Michael Sigman, Mary R Williams

Abstract

The covariance matrix computed from the retention time-ion abundance data matrix from gas chromatography/mass spectrometry analysis of ignitable liquids is shown to be a useful tool for automated identification of ignitable liquids in a database. The absolute value of the element-by-element difference between two normalized covariance matrices is shown to quantitatively differentiate between ignitable liquids composed of complex mixtures of hydrocarbons and is amenable to automated searching of ignitable liquid databases. The covariance mapping method is applied to a matrix-contaminated postburn sample, allowing the determination of a high degree of similarity between the ignitable liquid and a heavily evaporated gasoline.

Citations

May 5, 2009·Analytical and Bioanalytical Chemistry·Lucas J MarshallRuth Waddell Smith
Jan 15, 2008·Journal of the American Society for Mass Spectrometry·Melissa S Reinard, Murray V Johnston
Mar 19, 2014·Forensic Science International : Synergy·J I CachoM Hernández-Córdoba
Oct 24, 2007·Forensic Science International : Synergy·P Mark L Sandercock
Sep 10, 2009·Journal of Forensic Sciences·Davia T HudsonKenneth G Furton
Jul 23, 2008·Journal of Forensic Sciences·Nicholas D K PetracoT A Kubic
Apr 5, 2013·Journal of Forensic Sciences·Erin E WaddellMichael E Sigman
Jun 14, 2015·Annual Review of Analytical Chemistry·William D Hoffmann, Glen P Jackson
May 26, 2015·Forensic Science International : Synergy·Martin LopatkaGabriel Vivó-Truyols
May 25, 2015·Talanta·Marta Ferreiro-GonzálezCarmelo G Barroso
May 18, 2016·Sensors·Marta Ferreiro-GonzálezCarmelo G Barroso
Aug 15, 2009·Applied Spectroscopy·Jianbo ChenSuqin Sun
Nov 9, 2017·Sensors·Marta Ferreiro-GonzálezCarmelo G Barroso
Dec 1, 2006·Journal of Mass Spectrometry : JMS
Mar 2, 2019·Proceedings of the National Academy of Sciences of the United States of America·Jonathan Owen TollerudDaniele Fausti
Nov 27, 2020·Scientific Reports·Sander KorverMahinder Ramdin
May 20, 2008·Analytical Chemistry·Barry Lavine, Jerome Workman
May 18, 2007·Analytical Chemistry·T A BrettellJ R Almirall

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