title: Simultaneous determination of morphine and codeine in blood by use of select ion monitoring and deuterated internal standards.
mesh_terms: D002849:Chromatography, Gas; D003061:Codeine / Q000097:blood*; D003903:Deuterium; D003932:Heroin / Q000506:poisoning; D006801:Humans; D013058:Mass Spectrometry; D008722:Methods; D009020:Morphine / Q000097:blood* / Q000506:poisoning
chemical_list: D003932:Heroin; D009020:Morphine; D003903:Deuterium; D003061:Codeine