title: Application of a gas chromatographic capillary-to-capillary column-switching system to the analysis of complex illicit drug samples.
mesh_terms: D002849:Chromatography, Gas; D003932:Heroin / Q000032:analysis; D013287:Illicit Drugs / Q000032:analysis*; D009892:Opium / Q000032:analysis
chemical_list: D013287:Illicit Drugs; D003932:Heroin; D009892:Opium