title: Microscope-assisted UV-initiated preparation of well-defined porous polymer monolithic plugs in glass microchips for peptide preconcentration.
abstract: Herein, highly defined monolithic beds were prepared in glass microchips by photopolymerization of ethylene glycol methacrylate phosphate (EGMP), acrylamide, and N,N'-methylenebisacrylamide (BAA) using an epifluorescence microscope as UV-irradiation source. Such a fast and easy method allowed precise control of (i) the edge shape, (ii) the location along the microchannel, and (iii) the length of the monolithic plugs within glass microchips. The addition of hydroquinone, a polymerization inhibitor, to the prepolymerization mixture was beneficial for achieving local and robust incorporation of monoliths with sharp edges within microchannels. The monolith length was easily tuned from 160 to 400 μm through simple change in the magnification of the objective and was found to be repeatable (relative standard deviation <7.5%). Further application for on-chip monolith-assisted solid - phase extraction is demonstrated for fluorescently labeled peptide. Both binding and subsequent elution behaviors were found to fully agree with a cation-exchange mechanism in concordance with the presence of phosphate groups at the monolith surface. Graphical abstract In-chip microscope-UV-synthesis of monolithic plugs with sharp edges.
authors.affiliation: Univ. Paris-Est, ICMPE (UMR7182), CNRS, UPEC, 2 Rue Henri Dunant, 94320, Thiais, France.|Institut Galien Paris Sud, UMR8612, Protein and Nanotechnology in Analytical Science (PNAS), CNRS, Univ. Paris-Sud, Univ. Paris-Saclay, 5 rue Jean Baptiste Clément, 92290, Châtenay-Malabry, France.
authors.forename: Szymon
authors.initials: S
authors.lastname: Dziomba
authors.affiliation: Institut Galien Paris Sud, UMR8612, Protein and Nanotechnology in Analytical Science (PNAS), CNRS, Univ. Paris-Sud, Univ. Paris-Saclay, 5 rue Jean Baptiste Clément, 92290, Châtenay-Malabry, France.
authors.forename: Monica
authors.initials: M
authors.lastname: Araya-Farias
authors.affiliation: Institut Galien Paris Sud, UMR8612, Protein and Nanotechnology in Analytical Science (PNAS), CNRS, Univ. Paris-Sud, Univ. Paris-Saclay, 5 rue Jean Baptiste Clément, 92290, Châtenay-Malabry, France.
authors.forename: Myriam
authors.initials: M
authors.lastname: Taverna
authors.affiliation: Univ. Paris-Est, ICMPE (UMR7182), CNRS, UPEC, 2 Rue Henri Dunant, 94320, Thiais, France.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Guerrouache
authors.affiliation: Univ. Paris-Est, ICMPE (UMR7182), CNRS, UPEC, 2 Rue Henri Dunant, 94320, Thiais, France.
authors.forename: Benjamin
authors.initials: B
authors.lastname: Carbonnier
authors.affiliation: Institut Galien Paris Sud, UMR8612, Protein and Nanotechnology in Analytical Science (PNAS), CNRS, Univ. Paris-Sud, Univ. Paris-Saclay, 5 rue Jean Baptiste Clément, 92290, Châtenay-Malabry, France. thuy.tran-maignan@u-psud.fr.
authors.forename: N Thuy
authors.initials: NT
authors.lastname: Tran
mesh_terms: D005898:Glass; D008853:Microscopy / Q000379:methods*; D010455:Peptides / Q000737:chemistry*; D011108:Polymers; D016062:Porosity; D014466:Ultraviolet Rays / Q000009:adverse effects*
chemical_list: D010455:Peptides; D011108:Polymers
keywords: Glass microchips; Microscope-assisted photopolymerization; Monolith solid - phase extraction; On-chip monolithic plugs; Peptide; Preconcentration