title: Electrochromatography in poly(dimethyl)siloxane microchips using organic monolithic stationary phases.
abstract: This paper shows the in situ synthesis of an hexyl acrylate monolith in PDMS microfluidic devices and its subsequent use as stationary phase for electrochromatography on chip. To overcome the ability of PDMS material to absorb organic monomers, surface modification of the enclosed channels was realized by UV-mediated graft polymerization. This grafting procedure is based on the preliminary adsorption of a photoinitiator onto the PDMS surface and polymerization of charged monomers. Next, hexyl acrylate monoliths were cast in situ using photopolymerization process. The chromatographic behavior of the monolithic column was confirmed by the successful separation of derivatized catecholamines in the PDMS device using a 30 mm effective separation length (100 microm x 100 microm section). Efficiencies reached up to 200,000 plates per meter.
authors: Laboratoire des Sciences Analytiques, Université Lyon I, Villeurbanne, France. karine.faure@univ-lyon1.fr
authors: Karine
authors: K
authors: Faure
authors: Maximilien
authors: M
authors: Blas
authors: Omar
authors: O
authors: Yassine
authors: Nathalie
authors: N
authors: Delaunay
authors: Gérard
authors: G
authors: Crétier
authors: Monique
authors: M
authors: Albert
authors: Jean-Louis
authors: JL
authors: Rocca
mesh_terms: D053801:Capillary Electrochromatography / Q000295:instrumentation* / Q000379:methods; D004129:Dimethylpolysiloxanes / Q000737:chemistry*; D004298:Dopamine / Q000302:isolation & purification; D009638:Norepinephrine / Q000302:isolation & purification; D012828:Silicones / Q000737:chemistry*
chemical_list: D004129:Dimethylpolysiloxanes; D012828:Silicones; C013830:baysilon; D004298:Dopamine; D009638:Norepinephrine