title: PARAFAC and PLS applied to spectrophotometric determination of tetracycline in pharmaceutical formulation and biological fluids.
abstract: A simple and rapid analytical procedure was proposed for determination of tetracycline in pharmaceutical formulation, urine and plasma based on chemometrics methods and spectrophotometric measurements. The calibration set was constructed with twenty solutions in concentration range 0.25-13.00 microg ml(-1) for tetracycline. The procedure was repeated at nine different pH values. Partial least squares (PLS) models were built at each pH and used to determinate a set of synthetic tetracycline solutions. The best model was obtained at pH 8.00 (PLS-PH8). Parallel factor analysis (PARAFAC) model was applied to a three-way array constructed using all the pH data sets and enabled better results. The capabilities of the method for the analysis of real samples were evaluated by determination of tetracycline in pharmaceutical formulations and biological fluids with satisfactory results.
authors.affiliation: Department of Chemistry, Faculty of Sciences, Azad University of Arak, Arak 38135-567, Iran. ali.niazi@gmail.com
authors.forename: Ali
authors.initials: A
authors.lastname: Niazi
authors.forename: Mohammad
authors.initials: M
authors.lastname: Sadeghi
mesh_terms: D000900:Anti-Bacterial Agents / Q000032:analysis* / Q000097:blood / Q000652:urine; D002138:Calibration; D002626:Chemistry, Pharmaceutical; D005163:Factor Analysis, Statistical; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D016018:Least-Squares Analysis; D016014:Linear Models; D015233:Models, Statistical; D012015:Reference Standards; D013056:Spectrophotometry, Ultraviolet; D013752:Tetracycline / Q000032:analysis* / Q000097:blood / Q000652:urine
chemical_list: D000900:Anti-Bacterial Agents; D007202:Indicators and Reagents; D013752:Tetracycline