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Identification of several common adulterants and diluents in street samples of Cocaine by Infrared S

Identification of several common adulterants and diluents in street samples of Cocaine by Infrared S

  1. BoxStar
    Authorized Reprint from Journal of Forensic Sciences, July 1995.
    Copyright 1995 American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.

    ABSTRACT: This paper describes an improved method for the direct identification of adulterants and diluents in street samples of cocaine using infrared spectroscopy. The proposed method requires a versatile software package designed for handling infrared data on a personal computer. The spectra of the mixtures of Cocaine HCI and several common adulterants (Caffeine, Procaine HCI, Lidocaine HCI and Piracetam) and diluents (Glucose, Lactose, Sucrose, Starch and Mannitol) were recorded. Two regions were chosen in the infrared spectra: 1800-1500 cm-l, which includes all the assayed adulterants and 960-860 cm-l, for sugars and polyalcohols. The display of the different spectra through the computerized program allowed the identification of the above mentioned substances even at 5% concentration.