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Comparison analysis of illicit cocaine samples.

K E Janzen1, L Walter, A R Fernando

  • 1Royal Canadian Mounted Police Forensic Laboratory, Edmonton, Alberta.

Journal of Forensic Sciences
|March 1, 1992
PubMed
Summary

A new rapid method analyzes illicit cocaine samples using gas chromatography. This technique compares alkaloid ratios to determine the common origin of different drug samples.

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Area of Science:

  • Forensic Chemistry
  • Analytical Chemistry

Background:

  • Illicit drug analysis is crucial for law enforcement and public health.
  • Characterizing cocaine samples aids in tracing supply chains and identifying sources.
  • Existing methods for cocaine sample comparison can be time-consuming.

Purpose of the Study:

  • To develop a rapid and reliable method for the comparative analysis of illicit cocaine samples.
  • To establish a system for determining the commonality of origin for seized cocaine.

Main Methods:

  • Utilized capillary gas chromatography with a nitrogen-phosphorus detector for raw data acquisition.
  • Calculated area ratios of key alkaloids (tropacocaine, norcocaine, cis-cinnamoylcocaine, trans-cinnamoylcocaine) relative to cocaine.
  • Compiled these ratios into a computer database for efficient sample comparison.

Main Results:

  • The developed method provides rapid analysis of cocaine samples.
  • Alkaloid area ratios serve as unique fingerprints for cocaine samples.
  • The database facilitates straightforward comparison and assessment of sample commonality.

Conclusions:

  • The rapid gas chromatography method enables reliable determination of cocaine sample origins.
  • This technique supports forensic investigations by linking different seizures.
  • The approach offers an efficient tool for comparative analysis in forensic chemistry.

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