title: Spectrophotometric determination of Diclofenac sodium with Methylene Blue.
abstract: A sensitive spectrophotometric method was established for the determination of Diclofenac sodium (DS) with Methylene Blue (MB) as analytical reagent. It was found that DS reacts with an excess of MB in the pH range 9.2-9.4, to form a chloroform-extractable blue ion-association complex. Good agreement with Beer's law was found in the range of DS concentrations of 0.8-6.4 mug/ml with a detection limit of 0.37 mug/ml. The method was applied for the determination of DS in various tableted forms with a good precision.
authors.affiliation: Facultad de Estudios Superiores Cuautitlán U.N.A.M., Sección de Química Analítica, Campo Uno. Av. Primero de Mayo, s/N Cuautitlán Izcalli, C.P. 54740, Estado de México, México.
authors.forename: J C
authors.initials: JC
authors.lastname: Botello
authors.forename: G
authors.initials: G
authors.lastname: Pérez-Caballero