title: Kinetic determination of nortriptyline in pharmaceutical samples by use of photometric and fluorimetric detection.
abstract: A fast kinetic method is proposed for the photometric and fluorimetric determination of nortriptyline hydrochloride. The method involves measuring the rate of formation of an adduct with 4-chloro-7-nitrobenzofurazan, which exhibits light absorption and fluorescent properties, and the use of a stopped-flow mixing technique, which facilitates application to automatic routine analyses. The reaction rate is measured within only 30 s. The detection limit is 0.12 micrograms ml-1 (photometry) and 0.18 micrograms ml-1 (fluorimetry) and the calibration graph is linear up to 60 micrograms ml-1 in both cases. The precision (as RSD) is less than 1.5%. The proposed method was satisfactorily used for direct analysis of pharmaceutical preparations and a mean recovery near 100% was obtained with both photometric and fluorimetric detection.
authors.affiliation: Department of Analytical Chemistry, Faculty of Sciences, University of Córdoba, Spain.
authors.forename: L
authors.initials: L
authors.lastname: de la Peña
authors.forename: A
authors.initials: A
authors.lastname: Gómez-Hens
authors.forename: D
authors.initials: D
authors.lastname: Pérez-Bendito
mesh_terms: D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D009661:Nortriptyline / Q000032:analysis*; D010783:Photometry; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet
chemical_list: D009661:Nortriptyline