A spectrofluorometric method for the quantitative determination of flufenamic, mefenamic and meclofenamic acids in mixtures has been developed by recording emission fluorescence spectra between 370 and 550 nm with an excitation wavelength of 352 nm. The excitation-emission spectra of these compounds are deeply overlapped which does not allow their direct determination without previous separation. The proposed method applies partial least squares (PLS) multivariate calibration to the resolution of this mixture using a set of wavelengths previously selected by Kohonen artificial neural networks (K-ANN). The linear calibration graphs used to construct the calibration matrix were selected in the ranges from 0.25 to 1.00 μg ml-1 for flufenamic and meclofenamic acids, and from 1.00 to 4.00 μg ml-1 for mefenamic acid. A cross-validation procedure was used to select the number of factors. The selected calibration model has been applied to the determination of these compounds in synthetic mixtures and pharmaceutical formulations. (C) 2000 Elsevier Science B.V.

Capitan Valley, L., Navas, N., Delolmo, M., Consonni, V., & Todeschini, R. (2000). Resolution of mixtures of three nonsteroidal anti-inflammatory drugs by fluorescence using partial least squares multivariate calibration with previous wavelength selection by Kohonen artificial neural networks. TALANTA, 52, 1069-1079.

Resolution of mixtures of three nonsteroidal anti-inflammatory drugs by fluorescence using partial least squares multivariate calibration with previous wavelength selection by Kohonen artificial neural networks

CONSONNI, VIVIANA;TODESCHINI, ROBERTO
2000

Abstract

A spectrofluorometric method for the quantitative determination of flufenamic, mefenamic and meclofenamic acids in mixtures has been developed by recording emission fluorescence spectra between 370 and 550 nm with an excitation wavelength of 352 nm. The excitation-emission spectra of these compounds are deeply overlapped which does not allow their direct determination without previous separation. The proposed method applies partial least squares (PLS) multivariate calibration to the resolution of this mixture using a set of wavelengths previously selected by Kohonen artificial neural networks (K-ANN). The linear calibration graphs used to construct the calibration matrix were selected in the ranges from 0.25 to 1.00 μg ml-1 for flufenamic and meclofenamic acids, and from 1.00 to 4.00 μg ml-1 for mefenamic acid. A cross-validation procedure was used to select the number of factors. The selected calibration model has been applied to the determination of these compounds in synthetic mixtures and pharmaceutical formulations. (C) 2000 Elsevier Science B.V.
Articolo in rivista - Articolo scientifico
Kohonen maps,regression methods, nonsteroidal drugs
English
1069
1079
11
Capitan Valley, L., Navas, N., Delolmo, M., Consonni, V., & Todeschini, R. (2000). Resolution of mixtures of three nonsteroidal anti-inflammatory drugs by fluorescence using partial least squares multivariate calibration with previous wavelength selection by Kohonen artificial neural networks. TALANTA, 52, 1069-1079.
Capitan Valley, L; Navas, N; Delolmo, M; Consonni, V; Todeschini, R
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10281/4540
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