title: Identification of cocaine in cocaine-lidocaine mixtures ("rock cocaine") and other illicit cocaine preparations using derivative absorption spectroscopy.
abstract: A rapid second-derivative procedure for distinguishing cocaine and other local anesthetics is described. This technique appeared to be particularly useful in the detection of cocaine in binary mixtures. It is of great value in forensic toxicology, resolving cocaine-lidocaine, cocaine-procaine, cocaine-tetracaine, and cocaine-benzocaine mixtures, for which zero-order UV spectroscopy fails.
authors.affiliation: Departamento de Medicina Legal y Toxicologia, Facultad de Medicina, Cadiz, Spain.
authors.forename: M I
authors.initials: MI
authors.lastname: Arufe-Martinez
authors.forename: J L
authors.initials: JL
authors.lastname: Romero-Palanco
mesh_terms: D001566:Benzocaine / Q000032:analysis; D003042:Cocaine / Q000032:analysis*; D013287:Illicit Drugs / Q000032:analysis*; D008012:Lidocaine / Q000032:analysis*; D011343:Procaine / Q000032:analysis; D013057:Spectrum Analysis; D013748:Tetracaine / Q000032:analysis; D014965:X-Rays
chemical_list: D013287:Illicit Drugs; D013748:Tetracaine; D011343:Procaine; D008012:Lidocaine; D003042:Cocaine; D001566:Benzocaine