INQUISAL   20936
INSTITUTO DE QUIMICA DE SAN LUIS "DR. ROBERTO ANTONIO OLSINA"
Unidad Ejecutora - UE
artículos
Título:
Sensitive Surfactant mediated spectrofluorimetric determination of sildenafil
Autor/es:
CHIEN CHUN WANG; RAÚL A. SILVA; ADRIANA N. MASI; LILIANA P. FERNÁNDEZ
Revista:
ANALYTICAL METHODS
Editorial:
Royal Society of Chemistry
Referencias:
Año: 2010 vol. 2 p. 519 - 524
ISSN:
1759-9660
Resumen:
Two simple and sensitive surfactant-mediated spectrofluorimetric methods for the determination of sildenafil are proposed in this paper. These methods are based on the interaction of sildenafil with normal micelles of HTAB (hexadecyltrimethylammonium bromide, method A) and the formation of ion-association complexes of sildenafil with SDS (sodium dodecyl sulfate, method B). In both methods, the formed species produce considerable fluorescence enhancement, which allows sildenafil to be quantitatively determined. Linearity was obtained for sildenafil in the concentration range 0.004 to 25 g mL-1 with a detection limit of 0.0012 g mL-1 by method A; and a linearity range of 0.005 to 50.0 g mL-1 with a detection limit of 0.0016 g mL-1 by method B. The proposed methods have been applied to the analysis of bulk drug, tablets, herbal medicine and beverages. Validation processes were performed by recovery studies and statistical analysis with satisfactory results.