title: Simple and rapid method for the determination of caffeine in urine using Extrelut-1 columns.
mesh_terms: D002110:Caffeine / Q000652:urine*; D002849:Chromatography, Gas / Q000379:methods; D003069:Coffee; D006801:Humans; D006863:Hydrogen-Ion Concentration
chemical_list: D003069:Coffee; D002110:Caffeine