Preparation and evaluation of butyl acrylate-based monolithic columns for CEC using ammonium peroxodisulfate as a chemical initiator.
Acrylate-ester-based monoliths for CEC using peroxodisulfate as a chemical initiator were prepared. The influence of two ternary porogenic solvents on the physical and chromatographic properties of butyl acrylate monolithic stationary phases was investigated. The composition and the ratio of porogenic solvent were adjusted to obtain highly permeable rigid monoliths with adequate column efficiency. Among the prepared butyl acrylate monoliths, those polymerized from a ternary porogenic solvent of acetonitrile/ethanol/water exhibited the most promising performance with a minimum plate height for naphthalene of 10.5 microm and a bed permeability of 7.3 x 10(-14) m(2). A comparison in terms of efficiency and permeability with thermal and UV initiation using alpha,alpha'-AIBN was also performed. The resulting monolithic stationary phases were evaluated in terms of reproducibility, giving RSD values below 5.1% in the electrochromatographic properties studied.
Department of Analytical Chemistry, Faculty of Chemistry, University of Valencia, Valencia, Spain.
Amparo
A
Cantó-Mirapeix
José Manuel
JM
Herrero-Martínez
Carlos
C
Mongay-Fernández
Ernesto F
EF
Simó-Alfonso
D000179:Acrylates / Q000737:chemistry*; D000645:Ammonium Sulfate / Q000737:chemistry*; D053801:Capillary Electrochromatography / Q000295:instrumentation* / Q000379:methods; D005029:Ethylenediamines / Q000737:chemistry; D008689:Methacrylates / Q000737:chemistry; D015203:Reproducibility of Results
D000179:Acrylates; D005029:Ethylenediamines; D008689:Methacrylates; C005798:N,N,N',N'-tetramethylethylenediamine; C031276:ammonium peroxydisulfate; C032490:n-butyl acrylate; C016284:butyl methacrylate; D000645:Ammonium Sulfate