Title

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

Authors

Authors

M. E. Sigman;M. R. Williams

Comments

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

Abbreviated Journal Title

Anal. Chem.

Keywords

AUTOMOTIVE GASOLINE SAMPLES; FLIGHT MASS-SPECTROMETRY; FIRE DEBRIS; PATTERN-RECOGNITION; FORENSIC ANALYSIS; SIMULATION; Chemistry, Analytical

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.

Journal Title

Analytical Chemistry

Volume

78

Issue/Number

5

Publication Date

1-1-2006

Document Type

Article

DOI Link

http://dx.doi.org/10.1021/ac058040e

Language

English

First Page

1713

Last Page

1718

WOS Identifier

WOS:000235921700051

ISSN

0003-2700

Recommended Citation

"Covariance mapping in the analysis of ignitable liquids by gas chromatography/mass spectrometry" (2006). Faculty Bibliography 2000s. 6587.
https://stars.library.ucf.edu/facultybib2000/6587