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Related Experiment Videos

Simple field test for marijuana.

C A Lau-Cam, V Pizzitola

    Journal of Pharmaceutical Sciences
    |August 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    A new field test accurately detects marijuana and its products in under a minute. This rapid, sensitive test uses a Fast Blue B reagent and can be confirmed with spectrophotometry.

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    Area of Science:

    • Forensic Chemistry
    • Analytical Chemistry
    • Plant Science

    Background:

    • Accurate and rapid detection of marijuana is crucial for forensic and law enforcement applications.
    • Existing field tests may lack specificity or require complex procedures.
    • The need for a simple, sensitive, and specific on-site test for cannabis products is evident.

    Purpose of the Study:

    • To describe a novel, simple, rapid, sensitive, and specific field test for the detection of marijuana and its products.
    • To evaluate the test's performance against non-marijuana plant materials.
    • To establish a confirmatory spectrophotometric analysis for enhanced accuracy.

    Main Methods:

    • Utilized an extracting-eluting solvent and an inert adsorbent microcolumn coated with Fast Blue B salt.

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  • Tested minimal sample amounts (1 mg or less) with a 1-minute test duration.
  • Employed spectrophotometric analysis of colored eluates for confirmation.

    • Main Results:

    • The test demonstrated high sensitivity and specificity for marijuana detection.
    • Nutmeg and mace showed initial similar responses, but differentiation was achievable through microcolumn evaluation and elution behavior.
    • The Fast Blue B reagent microcolumn exhibited excellent stability against environmental factors.

    Conclusions:

    • The described field test offers a simple, rapid, and reliable method for identifying marijuana and its products.
    • The test's specificity is high, with clear differentiation from common interfering substances like nutmeg.
    • The integrated confirmatory spectrophotometric step enhances the test's forensic utility and reliability.