title: Determination of theophylline in plasma ultrafiltrate by reversed phase high pressure liquid chromatography.
mesh_terms: D002110:Caffeine / Q000097:blood; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D008722:Methods; D013806:Theophylline / Q000097:blood*; D014462:Ultrafiltration; D014970:Xanthines / Q000097:blood
chemical_list: D014970:Xanthines; D002110:Caffeine; D013806:Theophylline