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| Format: | Artículo científico |
| Language: | en |
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Sociedad Mexicana de Ciencia y Tecnología de Superficies y Materiales A.C.
2012
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| Online Access: | https://www.redalyc.org/articulo.oa?id=94224536009 |
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Table of Contents:
- Surface modification of Poly(tetrafluorethylene) magnetic stirring bars with plasma of hexamethyldisiloxane and its applications in the stir bar sorptive extraction technique R. Baeza-Marrufo P. Acereto-Escoffié C. Carrera-Figueiras D. Muñoz-Rodriguez A. Ávila-Ortega J. A. López-Barrera J. Morales-Corona R. Olayo-González Física, Astronomía y Matemáticas Pesticides Gas Chromatography Hexamethyldisiloxane Plasma polymerization Stir bar sorptive extraction This paper explores the potential of plasma polymerization to modify the surface of stir bars for its use in Stir Bar Sorptive Extraction (SBSE). The modification of the poly(tetrafluoroethylene) surface of stir bars was done through plasma polymerization of hexamethyldisiloxane (30 min, 110 W and 1.4×10-1 Torr). The coating was characterized by contact angle, Fourier transform infrared spectroscopy, energy dispersive x-ray analysis and scanning electron microscopy. The modified stir bars were applied in SBSE to extract five organophosphorus pesticides (dichlorvos, diazinon, dichlofenthion, malathion and fensulfothion) from synthetic aqueous solutions. Extracts were analyzed by gas chromatography with mass spectrometric detection. Modified bars adsorbed four pesticides (stirring 60 min, back extraction with 1.4 mL of isooctane and 15 min of sonication). 2012 artículo científico 1665-3521 https://www.redalyc.org/articulo.oa?id=94224536009 en http://www.redalyc.org/revista.oa?id=942 Superficies y vacío application/pdf Sociedad Mexicana de Ciencia y Tecnología de Superficies y Materiales A.C. Superficies y vacío (México) Num.1 Vol.25