NCJ Number
246046
Journal
Journal of Forensic Sciences Volume: 58 Issue: 2 Dated: March 2013 Pages: 358-364
Date Published
March 2013
Length
7 pages
Annotation
Comparative analyses of 50 single-layer white architectural paints were conducted to determine the discrimination power using standard techniques and to provide a basis for assessing significance when paints with limited features are not discriminated.
Abstract
Utilizing Fourier transform infrared spectroscopy FTIR, 68 undifferentiated pairs resulted, yielding a discrimination of 94.45 percent. Adding stereomicroscopy, scanning electron microscopy SEM with energy dispersive spectroscopy EDS and backscatter electron BSE imaging, and pyrolysis-gas chromatography/mass spectrometry Py-GC/MS, the overall discrimination was 99.35 percent. The study included blind verification replicates, which resulted in the only pairs without indications of physical or chemical differences. The remaining groups of undifferentiated samples contained subtle differences by at least one technique, but were considered undifferentiated for the discrimination power evaluations. This study demonstrates a high degree of discrimination of single-layer white architectural paints using methods of analysis often encountered in forensic science laboratories. Abstract published by arrangement with John Wiley & Sons.