title: CEC column behaviour of butyl and lauryl methacrylate monoliths prepared in non-aqueous media.
abstract: Polymeric monolithic stationary phases for capillary electrochromatography were prepared using two bulk monomers, butyl methacrylate (BMA) and lauryl methacrylate (LMA), by in situ polymerization in non-aqueous media. The effect of 1,4-butanediol/1-propanol ratio on porous properties was investigated separately for each monomer, keeping the proportion of monomers to pore-forming solvents fixed at 40:60 wt:wt. Also, mixtures of BMA and LMA at different 1,4-butanediol/1-propanol ratios were studied for tailoring the morphological features of the monolithic columns. The chromatographic performance of the different columns was evaluated by means of van Deemter plots of polycyclic aromatic hydrocarbons. Mercury-intrusion porosimetry, SEM, and nitrogen-adsorption measurements were also performed in order to understand their retention behaviour and porous properties. A comparison of these features was also performed for monoliths made with one bulk monomer (BMA or LMA) and with mixtures of both. These mixed monoliths showed satisfactory efficiencies and analysis times compared with those made with one bulk monomer; thus, the BMA-LMA monoliths constitute an attractive alternative to manipulate the electrochromatographic properties of methacrylate beds in CEC.
authors.affiliation: Department of Analytical Chemistry, Faculty of Chemistry, University of Valencia, Valencia, Spain.
authors.forename: Amparo
authors.initials: A
authors.lastname: Cantó-Mirapeix
authors.forename: José M
authors.initials: JM
authors.lastname: Herrero-Martínez
authors.forename: Carlos
authors.initials: C
authors.lastname: Mongay-Fernández
authors.forename: Ernesto F
authors.initials: EF
authors.lastname: Simó-Alfonso
mesh_terms: D000433:1-Propanol / Q000737:chemistry*; D000327:Adsorption; D002072:Butylene Glycols / Q000737:chemistry*; D053801:Capillary Electrochromatography / Q000379:methods*; D057927:Hydrophobic and Hydrophilic Interactions; D008628:Mercury / Q000737:chemistry; D008689:Methacrylates / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D009584:Nitrogen / Q000737:chemistry; D011084:Polycyclic Aromatic Hydrocarbons / Q000737:chemistry / Q000302:isolation & purification; D016062:Porosity; D012997:Solvents / Q000737:chemistry
chemical_list: D002072:Butylene Glycols; D008689:Methacrylates; D011084:Polycyclic Aromatic Hydrocarbons; D012997:Solvents; C039681:1,4-butanediol; D000433:1-Propanol; D008628:Mercury; D009584:Nitrogen; C016284:butyl methacrylate