title: Determination of cocaine and cocaethylene in plasma by solid-phase microextraction and gas chromatography-mass spectrometry.
abstract: The present paper describes a method for the simultaneous determination of cocaine and cocaethylene in plasma. It was based in the extraction of the analytes by solid-phase microextraction (SPME), and gas chromatography-mass spectrometry (GC-MS) was used to identify and quantify the analytes in selected ion monitoring (SIM) mode. The method showed to be very simple, rapid and sensitive. The method was validated for the two compounds, including linearity (range 25-1000 ng/mL) and the main precision parameters. It was applied to ten plasma samples from cocaine and alcohol users, obtaining positive results in all cases.
authors.affiliation: Institute of Legal Medicine, Forensic Toxicology Service, Faculty of Medicine, C/ San Francisco s/n, 15782 Santiago de Compostela, Spain.
authors.forename: Iván
authors.initials: I
authors.lastname: Alvarez
authors.forename: Ana María
authors.initials: AM
authors.lastname: Bermejo
authors.forename: María Jesús
authors.initials: MJ
authors.lastname: Tabernero
authors.forename: Purificación
authors.initials: P
authors.lastname: Fernández
authors.forename: Patricia
authors.initials: P
authors.lastname: López
mesh_terms: D003042:Cocaine / Q000031:analogs & derivatives* / Q000097:blood*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D006801:Humans; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D052617:Solid Phase Microextraction / Q000379:methods*; D019966:Substance-Related Disorders / Q000097:blood
chemical_list: C066444:cocaethylene; D003042:Cocaine