Abstract |
Forensic laboratories around the world have seen an increase in the number of drug seizures containing methorphan. Levomethorphan is a narcotic and a controlled substance, and its enantiomer dextromethorphan is an antitussive agent used in over-the-counter medications. For the forensic analysis of seized drugs containing methorphan, it is important to report the stereochemical composition of the drug. Ideally, a method based on common forensic laboratory instrumentation is desirable. The use of the chiral derivatizing agent (-)- menthyl chloroformate followed by routine gas chromatography-mass spectrometry analysis of the derivative was shown to successfully determine the stereochemical composition of methorphan. This approach was applied to a street seizure containing methorphan proving that it was pure dextromethorphan. The derivatives of dextro- and levomethorphan were subjected to mass spectroscopic and nuclear magnetic resonance analysis, which confirmed that the structure of the derivatives remained unchanged as a result of the derivatization process.
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Authors | Christina Koo, Matthew Cox, Gunter Klass, Martin Johnston |
Journal | Journal of forensic sciences
(J Forensic Sci)
Vol. 57
Issue 6
Pg. 1549-55
(Nov 2012)
ISSN: 1556-4029 [Electronic] United States |
PMID | 22563682
(Publication Type: Journal Article)
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Copyright | © 2012 American Academy of Forensic Sciences. |