Abstract

PEREZ-PADILLA, Yamile et al. Evaluation of Polydimethylsiloxane-Phenylsiloxane as a Coating for Stir Bar Sorptive Extraction. J. Mex. Chem. Soc [online]. 2018, vol.62, n.2, pp.348-357. ISSN 1870-249X.  https://doi.org/10.29356/jmcs.v62i2.431.

Analytical pretreatment has become environmental-friendly because of material science assistance. In stir bar sorptive extraction (SBSE), a coating is typically used to isolate and preconcentrate organic compounds in aqueous samples. Here, a translucent coating based on polydimethylsiloxane and phenyltriethoxysilane was prepared by a sol-gel method. Characterization tests showed that the coating was homogeneous, relatively polar, and both thermally (< 400 °C) and chemically stable. Coated stir bars were evaluated in the SBSE experiments. Benzene derivatives were successfully extracted/preconcentrated from aqueous solutions and environmental waters. Furanic derivatives and antibiotics were moderately extracted from water, but they were extracted from isooctane.

Keywords : Sol-gel; polydimethylsiloxane; coating; SBSE; polyaromatics; furanics; antibiotics.