Supercritical Fluid Extraction of Natural Antioxidants from Rosemary: Comparison with Liquid Solvent Sonication
- Tena, M.T. 1
- Valcarcel, M. 1
- Hidalgo, P.J. 1
- Ubera, J.L. 1
-
1
Universidad de Córdoba
info
ISSN: 0003-2700
Año de publicación: 1997
Volumen: 46
Número: 9-10
Páginas: 521-526
Tipo: Artículo
Otras publicaciones en: Industrial and Engineering Chemistry. Analytical Chemistry.
Resumen
A method based on extraction with supercritical carbon dioxide has been developed for the analysis of pesticides in fruit. The method was tested on ten organophosphorus pesticides and dicloran in orange samples. Various solid additives including anhydrous sodium sulfate, Extrelut and diatomaceous earth were examined as extraction enhancers. Also tested were magnesium silicate as interference adsorbent, to increase selectivity, and sodium carbonate as alkaline salt, to prevent acidification of the sample by CO 2. The recoveries obtained by SFE (92-104 %; mean relative standard deviation 10 %) were higher than those of conventional methods. The polar pesticide methamidophos, however, was not recovered.