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Related Experiment Videos

Microcrystalline identification test of some amphetamines and hydrochlorothiazide: collaborative study

L Auerbach

    Journal - Association of Official Analytical Chemists
    |November 1, 1978
    PubMed
    Summary

    Collaborative studies validated new identification methods for amphetamines and hydrochlorothiazide. These chemical tests accurately identified drug powders, with the hydrochlorothiazide method now official first action.

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    Area of Science:

    • Analytical Chemistry
    • Forensic Toxicology
    • Pharmaceutical Analysis

    Background:

    • Accurate identification of pharmaceutical compounds is crucial for quality control and forensic analysis.
    • Existing methods for identifying amphetamines and hydrochlorothiazide required validation and potential improvement.

    Purpose of the Study:

    • To collaboratively study and validate a previously described method for identifying amphetamine, methamphetamine, dl-deoxyephedrine, and dextroamphetamine.
    • To introduce and validate a new method for the identification of hydrochlorothiazide.

    Main Methods:

    • Amphetamine identification involved volatilization from a basic solution into gold chloride, forming characteristic crystals.
    • Hydrochlorothiazide identification utilized direct addition of an I2-KI solution to an alkaline sample, yielding specific crystal formations.

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  • Ten collaborators analyzed 40 unknown drug dosage form powders using the described chemical identification procedures.

    • Main Results:

    • The amphetamine identification method successfully distinguished between methamphetamine and dl-deoxyephedrine.
    • The hydrochlorothiazide identification method demonstrated high accuracy.
    • Overall, 39 out of 40 unknown drug samples were correctly identified by the collaborators.

    Conclusions:

    • The validated amphetamine identification procedure is reliable for differentiating related compounds.
    • The new hydrochlorothiazide identification method is effective and has been adopted as official first action.
    • The collaborative study confirmed the robustness and applicability of these chemical identification tests in pharmaceutical and forensic settings.