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Related Experiment Videos

A comparative analysis of Cannabis material.

R T Coutts, G R Jones

    Journal of Forensic Sciences
    |April 1, 1979
    PubMed
    Summary

    Forensic analysis confirmed cannabinoid content in 100 plant materials using gas chromatography (GC) and GC-mass spectrometry (GC-MS). These advanced methods validated findings from traditional techniques like TLC for accurate identification of CBD, CBC, THC, and CBN.

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    Area of Science:

    • Forensic Chemistry
    • Analytical Chemistry
    • Pharmacognosy

    Background:

    • Accurate identification of cannabinoids in plant-based materials is crucial for forensic and regulatory purposes.
    • Traditional analytical methods, while useful, may require corroboration with more advanced techniques.
    • Cannabinoids such as cannabidiol (CBD), cannabichromene (CBC), delta-9-tetrahydrocannabinol (delta 9-THC), and cannabinol (CBN) are key compounds of interest.

    Purpose of the Study:

    • To independently analyze and identify specific cannabinoids (CBD, CBC, delta 9-THC, CBN) in 100 plant-like or resinous materials.
    • To compare and validate the results obtained from gas chromatography (GC) and GC-mass spectrometry (GC-MS) with those from traditional forensic analyses.
    • To confirm the reliability of forensic science analysts' cannabinoid identifications.

    Main Methods:

    • Gas chromatography (GC) was employed using two distinct column packings for the separation and analysis of cannabinoids.
    • Gas chromatography-mass spectrometry (GC-MS) was utilized for definitive identification and confirmation of cannabinoid compounds.
    • Traditional methods including microscopic examination, Duquenois-Levine color test, and thin-layer chromatography (TLC) were performed by forensic science analysts.

    Main Results:

    • The GC and GC-MS analyses successfully identified and quantified CBD, CBC, delta 9-THC, and CBN in the analyzed samples.
    • Independent identifications of these cannabinoids by GC-MS corroborated the findings of forensic science analysts.
    • GC-MS analysis of hexane extracts from TLC chromatogram spots confirmed the identifications made using TLC.

    Conclusions:

    • Gas chromatography and GC-MS provide reliable and accurate methods for the identification of major cannabinoids.
    • Advanced analytical techniques like GC-MS serve as a valuable tool for corroborating findings from traditional forensic methods.
    • The study validates the efficacy of combined analytical approaches for robust cannabinoid profiling in complex matrices.

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