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NCJRS Abstract

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  NCJ Number: NCJ 189913   Add to Shopping cart   Find in a Library
  Title: Technology Development, Implementation and Evaluation for Collection and Analysis of Explosives Trace Chemical Evidence
  Document URL: PDF 
  Author(s): M. E. Sigman
  Corporate Author: Oak Ridge National Laboratory
United States of America
  Date Published: 08/2000
  Page Count: 58
  Annotation: This report describes the development and performance of a method for sampling surfaces to detect the presence of trace amounts of organic explosives.
  Abstract: The goal of this research project was to provide scene investigators and forensic chemists with an alternative method for organic explosives sampling and analysis that does not require the use of solvents. The research has resulted in the development of a dry surface-wipe method of debris sampling that uses abraded Teflon as the sample-collection material. Teflon was identified as the wipe material-of-choice after surveying a number of commercial polymers. The resistance of Teflon to tearing on rough surfaces and edges of debris from a bomb blast and its stability under gentle heating made it the ideal material for this application. For analysis, an innovative approach was developed that involved heating the Teflon wipe to 170 degrees C in the sample inlet of the instrument. This allows the explosive to be removed from the wipe and introduced directly into a conventional gas chromatograph. The method developed uses commercially available polymers and laboratory instruments; it requires only the addition of a single inexpensive valve to the chromatograph's exterior ($20 and 5 minutes to install). Appended published papers on this research
  Main Term(s): Science and Technology
  Index Term(s): Testing and measurement ; Trace evidence ; Explosives ; Explosive detection
  Sponsoring Agency: National Institute of Justice (NIJ)
US Department of Justice
Office of Justice Programs
United States of America
  Grant Number: 1997-LB-VX-A063
  Sale Source: National Institute of Justice/NCJRS
Box 6000
Rockville, MD 20849
United States of America

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  Type: Program/Project Description
  Country: United States of America
  Language: English
  Note: Dataset may be archived by the NIJ Data Resources Program at the National Archive of Criminal Justice Data
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