Volume 40, Issue 6 (November 1995)

    The Differentiation of Illicit Methaqualone Tablet Formulations Using Principal Component and Soft Independent Modeling of Class Analogy Analysis of Their Near-Infrared Reflectance Spectra

    (Received 13 December 1994; accepted 12 April 1995)

    CODEN: JFSOAD

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    Abstract

    The viability of using principal component analysis (PCA) and soft independent modeling of class analogy analysis (SIMCA) of the near-infrared reflectance spectra of illicit methaqualone tablet formulations as an aid in sample differentiation was investigated.

    Near-infrared spectra of ten different illicit species occurring on the South African market was obtained through direct diffuse reflectance measurements made on the tablet surfaces using a bidirectional fiber-bundle probe.

    The learning set was analyzed using PCA and SIMCA and resolved in well-separated clusters thus making differentiation possible.


    Author Information:

    Van Zyl, EF
    Forensic Analysts, Forensic Science Laboratory, Pretoria,

    Louw, M
    Forensic Analysts, Forensic Science Laboratory, Pretoria,


    Stock #: JFS13879J

    ISSN: 0022-1198

    DOI: 10.1520/JFS13879J

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    Author
    Title The Differentiation of Illicit Methaqualone Tablet Formulations Using Principal Component and Soft Independent Modeling of Class Analogy Analysis of Their Near-Infrared Reflectance Spectra
    Symposium , 0000-00-00
    Committee E30