Supercritical fluid extraction of organophosphorus pesticides from orange samples: Effect of solid additives on recovery
- Tena, M.T. 1
- Rios, A. 1
- Valcárcel, M. 1
- Sánchez-Alarcón, M. 2
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1
Universidad de Córdoba
info
- 2 Lab. Agroalimentario de Cordoba, 14080 Córdoba, Spain
ISSN: 0009-5893
Année de publication: 1997
Volumen: 46
Número: 9-10
Pages: 524-528
Type: Article
D'autres publications dans: Chromatographia
Résumé
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.