title: Caffeine-picrylsulfonate liquid membrane electrode for selective determination of caffeine in analgesic preparations.
mesh_terms: D000700:Analgesics / Q000032:analysis*; D002110:Caffeine / Q000032:analysis*; D004566:Electrodes; D008567:Membranes, Artificial; D009578:Nitrobenzenes; D014302:Trinitrobenzenesulfonic Acid
chemical_list: D000700:Analgesics; D008567:Membranes, Artificial; D009578:Nitrobenzenes; D002110:Caffeine; D014302:Trinitrobenzenesulfonic Acid