title: Caffeine content of tea and coffee.
mesh_terms: D002110:Caffeine / Q000032:analysis*; D002845:Chromatography; D003069:Coffee / Q000032:analysis*; D013053:Spectrophotometry; D013662:Tea / Q000032:analysis*
chemical_list: D003069:Coffee; D013662:Tea; D002110:Caffeine