title: Some spectrophotometric methods for determination of certain antipyretic and antirheumatic drugs.
abstract: Heating paracetamol in strongly alkaline medium with 4-nitrosoantipyrine gives a red colour with maximum absorption at 515 nm. Mefenamic and flufenamic acids can be determined colorimetrically after extraction as ion-pairs with Methylene Blue.
authors.affiliation: Pharmaceutical Chemistry Department, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt.
authors.forename: A S
authors.initials: AS
authors.lastname: Issa
authors.forename: Y A
authors.initials: YA
authors.lastname: Beltagy
authors.forename: M
authors.initials: M
authors.lastname: Gabr Kassem
authors.forename: H G
authors.initials: HG
authors.lastname: Daabees