Journal
JOURNAL OF SEPARATION SCIENCE
Volume 39, Issue 20, Pages 3990-3997Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201600502
Keywords
Composite materials; Passive sampling; Pesticides; Stir bar sorptive extraction; Solid-phase extraction
Categories
Funding
- French National Agency for Water and Aquatic Environments (ONEMA)
- French National Research Agency (ANR) through the PoToMAC project [ANR 2011 CESA 022 02]
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Passive sampling techniques have been developed as an alternative method for in situ integrative monitoring of trace levels of neutral pesticides in environmental waters. The objective of this work was to develop a new receiving phase for pesticides with a wide range of polarities in a single step. We describe the development of three new composite silicone rubbers, combining polydimethylsiloxane mechanical and sorption properties with solid-phase extraction sorbents, prepared as a receiving phase for passive sampling. A composite silicone rubber composed of polydimethylsiloxane/poly(divinylbenzene-co-N-vinylpyrrolidone) was selected by batch experiments for its high sorption properties for pesticides with octanol-water partition coefficients ranging from 2.3 to 5.5. We named this composite material Polar/Apolar Composite Silicone Rubber. A structural study by scanning electron microscopy confirmed the homogeneous dispersion of the sorbent particles and the encapsulation of particles within the polydimethylsiloxane matrix. We also demonstrate that this composite material is resistant to common solvents used for the back-extraction of analytes and has a maximal resistance temperature of 350 degrees C. Therefore, the characteristics of the Polar/Apolar Composite Silicone Rubber meet most of the criteria for use as a receiving phase for the passive sampling of pesticides.
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