INVESTIGADORES
GOICOECHEA Hector Casimiro
artículos
Título:
Determination of dexamethasone and two excipients (creatinine and propylparaben) in injections by using UV-spectroscopy and multivariate calibrations
Autor/es:
MS COLLADO,; JC ROBLE,; MM DEZAN,; MS CAMARA,; V MANTOVANI,; GOICOECHEA, HÉCTOR C
Revista:
INTERNATIONAL JOURNAL OF PHARMACEUTICS
Editorial:
Elsevier
Referencias:
Año: 2001 vol. 229 p. 205 - 211
ISSN:
0378-5173
Resumen:
The use of multivariate spectrophotometric calibration for the simultaneous determination of dexamethasone and two typical excipients (creatinine and propylparaben) in injections is presented. The resolution of the three-component mixture in a matrix of excipients has been accomplished by using partial least-squares (PLS-1). Notwithstanding the elevated degree of spectral overlap, they have been rapidly and simultaneously determined with high accuracy and precision (comparable to the HPLC pharmacopeial method), with no interference, and without resorting to extraction procedures using non-aqueous solvents. A simple and fast method for wavelength selection in the calibration step is used, based on the minimisation of the predicted error sum of squares (PRESS) calculated as a function of a moving spectral window.