title: Extractive spectrophotometric analysis of potassium in pharmaceutical formulations using 18-crown-6 and picrate.
authors.forename: M A
authors.initials: MA
authors.lastname: Raggi
authors.forename: V
authors.initials: V
authors.lastname: Cavrini
authors.forename: A M
authors.initials: AM
authors.lastname: Di Pietra
authors.forename: L
authors.initials: L
authors.lastname: Nobile
mesh_terms: D043844:Crown Ethers; D004988:Ethers, Cyclic; D010851:Picrates; D011188:Potassium / Q000032:analysis*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D043844:Crown Ethers; D004988:Ethers, Cyclic; D010851:Picrates; C015762:18-crown-6; D011188:Potassium