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NCJ Number: 236879 Find in a Library
Title: Analysis and Discrimination of Electrical Tapes: Part II. Backings
Journal: Journal of Forensic Sciences  Volume:56  Issue:6  Dated:November 2011  Pages:1493-1504
Author(s): Andria H. Mehltretter, M.S.; Maureen J. Bradley, Ph.D.; Diana M. Wright, Ph.D.
Date Published: November 2011
Page Count: 12
Publisher: http://www.wiley.com 
Type: Report (Study/Research)
Format: Article
Language: English
Country: United States of America
Annotation: This study analyzed and evaluated the chemical components of the backings of 90 black electrical tapes.
Abstract: The backings of 90 black electrical tapes were analyzed to evaluate the chemical components of these films, the ability of individual techniques to discriminate samples, and the ability of the techniques combined to distinguish samples. The techniques utilized and their respective discrimination results were stereomicroscopy and physical measurements, to include observation of surface features of the backing, width, and thickness measurements (c. 64 percent); Fourier transform infrared spectroscopy (FTIR) using a microscope accessory (c. 83 percent); pyrolysis–gas chromatography/mass spectrometry (Py-GC/MS; c. 81 percent); and scanning electron microscopy/energy-dispersive spectroscopy (SEM/EDS; c. 87 percent). Ninety-four percent of the backings were discriminated through this combination of analytical methods. Finally, evaluating these results in conjunction with previously published data on the analysis of the adhesives from the same set of electrical tapes provided an overall discrimination of nearly 96 percent. (Published Abstract)
Main Term(s): Criminology
Index Term(s): Chromatography; Evidence collection; Evidence identification; Forensic sciences; Infrared techniques; Investigative techniques; Mass spectroscopy; Spectroscopy; Suspect identification
Note: Presented in part at the 61st Annual Meeting of the American Academy of Forensic Sciences, February 16–21, 2009, in Denver, CO.
To cite this abstract, use the following link:
http://www.ncjrs.gov/App/publications/abstract.aspx?ID=258899

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