Title

Progress Toward The Determination Of Correct Classification Rates In Fire Debris Analysis

Keywords

Chemometrics; Discriminant analysis; Fire debris; Forensic science; Gas chromatography-mass spectrometry; Multivariate statistics

Abstract

Principal components analysis (PCA), linear discriminant analysis (LDA), and quadratic discriminant analysis (QDA) were used to develop a multistep classification procedure for determining the presence of ignitable liquid residue in fire debris and assigning any ignitable liquid residue present into the classes defined under the American Society for Testing and Materials (ASTM) E 1618-10 standard method. A multistep classification procedure was tested by cross-validation based on model data sets comprised of the time-averaged mass spectra (also referred to as total ion spectra) of commercial ignitable liquids and pyrolysis products from common building materials and household furnishings (referred to simply as substrates). Fire debris samples from laboratory-scale and field test burns were also used to test the model. The optimal model's true-positive rate was 81.3% for cross-validation samples and 70.9% for fire debris samples. The false-positive rate was 9.9% for cross-validation samples and 8.9% for fire debris samples. © 2013 American Academy of Forensic Sciences.

Publication Date

7-1-2013

Publication Title

Journal of Forensic Sciences

Volume

58

Issue

4

Number of Pages

887-896

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1111/1556-4029.12159

Socpus ID

84880172111 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84880172111

This document is currently not available here.

Share

COinS