title: Preparation of molecularly imprinted polymeric fibers using a single bifunctional monomer for the solid-phase microextraction of parabens from environmental solid samples.
abstract: In this study, molecularly imprinted polymer fibers for solid-phase microextraction have been prepared with a single bifunctional monomer, N,O-bismethacryloyl ethanolamine using the so-called "one monomer molecularly imprinted polymers" method, replacing the conventional combination of functional monomer and cross-linker to form high fidelity binding sites. For comparison, imprinted fibers were prepared following the conventional approach based on ethylene glycol dimethacrylate as cross-linker and methacrylic acid as monomer. The recognition performance of the new fibers was evaluated in the solid-phase microextraction of parabens, and from this study it was concluded that they provided superior performance over conventionally formulated fibers. Ultimately, real-world environmental testing on spiked solid samples was successful by the molecularly imprinted solid-phase microextraction of samples, and the relative recoveries obtained at enrichment levels of 10 ng/g of parabens were within 78-109% for soil and 83-109% for sediments with a relative standard deviation <15% (n = 3).
authors.affiliation: Departamento de Medio Ambiente, INIA, Madrid, Spain.
authors.forename: Myriam
authors.initials: M
authors.lastname: Díaz-Álvarez
authors.affiliation: Department of Chemistry, Louisiana State University, Baton Rouge, LA, USA.
authors.forename: Stephen P
authors.initials: SP
authors.lastname: Smith
authors.affiliation: Department of Chemistry, Louisiana State University, Baton Rouge, LA, USA.
authors.forename: David A
authors.initials: DA
authors.lastname: Spivak
authors.affiliation: Departamento de Medio Ambiente, INIA, Madrid, Spain.
authors.forename: Antonio
authors.initials: A
authors.lastname: Martín-Esteban
keywords: Environmental solid samples; Molecularly imprinted fibers; Parabens; Solid-phase microextraction