Rapid quantitation of cocaine and benzoylecgonine in urine by "on column" capillary gaschromatography after "Extrelut" extraction.
D002849:Chromatography, Gas / Q000379:methods; D003042:Cocaine / Q000031:analogs & derivatives* / Q000652:urine*; D006801:Humans
C005618:benzoylecgonine; D003042:Cocaine