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NCJ Number: NCJ 242698   Add to Shopping cart   Find in a Library
Title: Forensic Drug Identification by Gas Chromatography - Infrared Spectroscopy
Author(s): Robert Shipman ; Trisha Conti ; Tara Tighe ; Eric Buel
Date Published: 2013
Page Count: 63
Sponsoring Agency: National Institute of Justice
US Department of Justice
Office of Justice Programs
United States of America
Grant Number: 2008-DN-BX-K161
Sale Source: NCJRS Photocopy Services
Box 6000
Rockville, MD 20849-6000
United States of America
Document: PDF 
Type: Report (Technical Assistance) ; Report (Grant Sponsored)
Language: English
Country: United States of America
Annotation: This research tested the effectiveness of using gas chromatography - infrared spectroscopy (GC/IR) to identify a controlled substance present in a drug exhibit.
Abstract: The GC/IR instrument developed proved to be a powerful forensic tool for identifying controlled substances, providing complementary data to gas chromatography - mass spectrometry (GC/MS), which has been the preferred method for identifying controlled substances; however, the application of GC/MS for drug analysis has limitations. Certain drugs yield minimal mass spectral fragmentation patterns using electron impact MS; and other compounds, such as some diastereomers and positional isomers, are not readily differentiated by mass spectroscopy. A newly introduced instrument collects GC effluent on a liquid nitrogen cooled, IR transparent window that allows the direct analysis of the deposited solid material. This technique is superior to the IR light pipe in sensitivity, IR spectral quality, and allows direct comparison of the collected spectra to existing IR databases. The instrument was tested for repeatability, sensitivity, and selectivity while optimizing for the analysis of a wide range of drug samples, including commonly encountered drugs, designer drugs, and closely related drug isomers. Through the studies conducted, the instrument was verified for casework analysis and is currently being used in the researchers’ laboratory. 25 figures, 9 tables, 18 references, and information on the dissemination of research findings
Main Term(s): Criminology
Index Term(s): Spectroscopy ; Chromatography ; Drug detection ; Infrared techniques ; Drug analysis ; Mass spectroscopy ; Forensics/Forensic Sciences ; Investigative techniques ; NIJ final report
   
  To cite this abstract, use the following link:
https://www.ncjrs.gov/App/Publications/abstract.aspx?ID=264773

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