skip navigation


Register for Latest Research

Stay Informed
Register with NCJRS to receive NCJRS's biweekly e-newsletter JUSTINFO and additional periodic emails from NCJRS and the NCJRS federal sponsors that highlight the latest research published or sponsored by the Office of Justice Programs.

NCJRS Abstract

The document referenced below is part of the NCJRS Virtual Library collection. To conduct further searches of the collection, visit the Virtual Library. See the Obtain Documents page for direction on how to access resources online, via mail, through interlibrary loans, or in a local library.


NCJ Number: 210457 Find in a Library
Title: Distinguishing the Good, and the Bad From the Ugly With GC and FT-IR
Journal: Forensic Magazine  Volume:2  Issue:3  Dated:June/July 2005  Pages:20-22
Author(s): Michael Bradley Ph.D.
Date Published: June 2005
Page Count: 3
Type: Report (Study/Research)
Format: Article
Language: English
Country: United States of America
Annotation: This article describes the methodology and results for analyzing an unknown chemical mixture that may contain impure chemicals along with illegal substances.
Abstract: The experiment focused on samples of drug materials that contained 0.5 mg per mL of analyte in solvent. The drugs included ephedrine, pseudoephedrine, heroin, and cocaine. The equipment used in the analysis was a gas chromatograph (GC) with a 10-meter column and an autosampler connected to an FT-IR spectrometer, driven with spectroscopy software. The specially designed software allowed the collection of Gram-Schmidt reconstructions and the profiling of the data. Based on the results of this experiment, this article concludes that the combination of GC and FT-IR provides a powerful means for analyzing chemical mixtures to determine their components. Although not as sensitive as gas chromatography and mass spectrometry, the GC-IR method provides structural information on the intact molecule, permitting an analysis of the stereochemistry. In addition, the IR bench provides access to other tools (microscopy, ATR, Raman) that can extend the capabilities of the forensics laboratory. 1 reference
Main Term(s): Drug analysis
Index Term(s): Chromatography; Forensic science training; Forensic sciences; Infrared techniques; Investigative techniques
To cite this abstract, use the following link:

*A link to the full-text document is provided whenever possible. For documents not available online, a link to the publisher's website is provided. Tell us how you use the NCJRS Library and Abstracts Database - send us your feedback.