Surface modification of poly(tetrafluorethylene) magnetic stirring bars with plasma of hexamethyldisiloxane and its applications in the stir bar sorptive extraction technique
Vol. 25 No. 1 (2012), Research Papers
Vol. 25 No. 1 (2012)

Surface modification of poly(tetrafluorethylene) magnetic stirring bars with plasma of hexamethyldisiloxane and its applications in the stir bar sorptive extraction technique

Research Papers
Published 2012-03-15
R. Baeza Marrufo
Universidad Autónoma de Yucatán Facultad de Ingeniería Química
P. Acereto Escoffié
Universidad Autónoma de Yucatán Facultad de Ingeniería Química
C. Carrera Figueiras
Universidad Autónoma de Yucatán Facultad de Ingeniería Química
D. Muñoz Rodríguez
Universidad Autónoma de Yucatán Facultad de Ingeniería Química
A. Ávila Ortega
Universidad Autónoma de Yucatán Facultad de Ingeniería Química
J. A. López Barrera
Academia de Física, Universidad Autónoma de la Ciudad de México
J. Morales Corona
Departamento de Física, Área de Polímeros, Universidad Autónoma Metropolitana, Unidad Iztapalapa
R. Olayo González
Departamento de Física, Área de Polímeros, Universidad Autónoma Metropolitana, Unidad Iztapalapa
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Keywords

Gas Chromatography
Stir bar sorptive extraction
Pesticides
Plasma polymerization
Hexamethyldisiloxane

How to Cite

Baeza Marrufo, R., Acereto Escoffié, P., Carrera Figueiras, C., Muñoz Rodríguez, D., Ávila Ortega, A., López Barrera, J. A., Morales Corona, J., & Olayo González, R. (2012). Surface modification of poly(tetrafluorethylene) magnetic stirring bars with plasma of hexamethyldisiloxane and its applications in the stir bar sorptive extraction technique. Superficies Y Vacío, 25(1), 49-55. Retrieved from https://superficiesyvacio.smctsm.org.mx/index.php/SyV/article/view/228
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Abstract

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. The extracts were analyzed by gas chromatography with mass spectrometric detection. The modified bars adsorbed four pesticides (stirring 60 min, back extraction with 1.4 mL of isooctane and 15 min of sonication).

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