title: Solid-phase extraction, identification, and quantitation of 11-nor-delta-9-tetrahydrocannabinol-9-carboxylic acid.
abstract: A procedure has been developed to extract and recover minute amounts of delta-9-carboxytetrahydrocannabinol (THC-COOH) from urine. A new non-isotopic internal standard is introduced to permit a chromatographic assay of the metabolite. The method affords a 91% recovery of 20 ng/mL of the THC-COOH acid from spiked urine with the assurance of a 3.8% coefficient of variation.
authors.affiliation: U.S. Army Criminal Investigation Laboratory-Pacific, APO San Francisco, CA.
authors.forename: G R
authors.initials: GR
authors.lastname: Nakamura
authors.forename: R D
authors.initials: RD
authors.lastname: Meeks
authors.forename: W J
authors.initials: WJ
authors.lastname: Stall
mesh_terms: D002849:Chromatography, Gas; D013759:Dronabinol / Q000031:analogs & derivatives* / Q000302:isolation & purification / Q000652:urine; D006801:Humans; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D013058:Mass Spectrometry; D008469:Meclofenamic Acid; D012015:Reference Standards
chemical_list: D008469:Meclofenamic Acid; C016780:11-nor-delta(9)-tetrahydrocannabinol-9-carboxylic acid; D013759:Dronabinol