title: Confirmation of cannabis abuse by the determination of 11-nor-delta 9-tetrahydrocannabinol-9-carboxylic acid in urine with high-performance liquid chromatography and electrochemical detection.
mesh_terms: D002851:Chromatography, High Pressure Liquid; D002855:Chromatography, Thin Layer; D013759:Dronabinol / Q000031:analogs & derivatives* / Q000652:urine*; D004563:Electrochemistry; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D002189:Marijuana Abuse / Q000652:urine*
chemical_list: C016780:11-nor-delta(9)-tetrahydrocannabinol-9-carboxylic acid; D013759:Dronabinol