title: Cholesterol-based polymeric monolithic columns for capillary liquid chromatography.
abstract: A novel, cholesterol-based polymeric monolithic stationary phase for capillary liquid chromatography, was prepared by thermally initiated in-situ polymerization. Cholesteryl methacrylate (CholMA) was used as a functional monomer and trimethylolpropane trimethacrylate (TRIM) was a cross-linker, while azobisisobutyronitrile (AIBN) was an initiator. Isooctane and toluene were chosen as "poor" and "good" solvent, respectively, as constituents of the porogen solvent. Isocratic elutions of alkylbenzenes and separation of the testing mixture of o-terphenyl and triphenylene were conducted for all of the monoliths to assess their hydrophobicity and planar selectivity characteristic for cholesterol-based stationary phases. The synthesized columns demonstrated efficiency exceeding N=10,000 plates and a plate height of ca. H=30 μm. Column preparation was found to be highly reproducible; the relative standard deviation (RSD) values (n=3) for day-to-day and column-to-column were less than 4.08 and 2.02%, respectively, based on retention factor of alkylbenzenes.
authors.affiliation: Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, 7 Gagarina St., 87-100 Torun, Poland. Electronic address: michu@chem.umk.pl.
authors.forename: Michał
authors.initials: M
authors.lastname: Szumski
authors.affiliation: Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, 7 Gagarina St., 87-100 Torun, Poland.
authors.forename: Damian
authors.initials: D
authors.lastname: Grzywiński
authors.affiliation: Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, 7 Gagarina St., 87-100 Torun, Poland.
authors.forename: Bogusław
authors.initials: B
authors.lastname: Buszewski
mesh_terms: D002196:Capillaries; D002784:Cholesterol / Q000737:chemistry*; D002853:Chromatography, Liquid / Q000295:instrumentation* / Q000379:methods; D057927:Hydrophobic and Hydrophilic Interactions; D008689:Methacrylates / Q000737:chemistry; D011108:Polymers / Q000737:chemistry; D016062:Porosity; D012997:Solvents / Q000737:chemistry
chemical_list: D008689:Methacrylates; D011108:Polymers; D012997:Solvents; D002784:Cholesterol; C028643:trimethylolpropane trimethacrylate
keywords: Capillary columns; Cholesterol stationary phase; Nano liquid chromatography.; Polymeric monoliths