A note on a simple estimation of amphetamine, methylamphetamine and ephedrine in horse urine.
D000661:Amphetamine / Q000652:urine*; D000818:Animals; D002855:Chromatography, Thin Layer; D004809:Ephedrine / Q000652:urine*; D006736:Horses; D008694:Methamphetamine / Q000652:urine*; D008722:Methods; D013053:Spectrophotometry
D008694:Methamphetamine; D000661:Amphetamine; D004809:Ephedrine