title: A rapid micro-method for the separation, identification and estimation of the purine bases: caffeine, theobromine and theophylline.
mesh_terms: D002110:Caffeine / Q000032:analysis*; D002855:Chromatography, Thin Layer; D008722:Methods; D012822:Silicon Dioxide; D013805:Theobromine / Q000032:analysis*; D013806:Theophylline / Q000032:analysis*
chemical_list: D002110:Caffeine; D012822:Silicon Dioxide; D013806:Theophylline; D013805:Theobromine