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CEC with new monolithic stationary phase based on a fluorinated monomer, trifluoroethyl methacrylate
Author(s) -
Yurtsever Arda,
Saraçogˇlu Berna,
Tuncel Ali
Publication year - 2009
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.200800417
Subject(s) - alkylbenzenes , monolith , methacrylate , polymerization , monomer , chemistry , monolithic hplc column , copolymer , phase (matter) , chromatography , benzoic acid , chemical engineering , polymer chemistry , high performance liquid chromatography , polymer , organic chemistry , catalysis , engineering
A new, fluorinated monolithic stationary phase for CEC was first synthesized by a single‐stage, thermally initiated copolymerization of a fluorinated monomer, 2,2,2‐trifluoroethyl methacrylate (TFEM) and ethylene dimethacrylate (EDMA) in the presence of a porogen mixture. In this preparation, 2‐acrylamido‐2‐methyl‐1‐propanesulfonic acid was used as the charge‐bearing monomer. The porogen mixture was prepared by mixing isoamylalcohol and 1,4‐butanediol. A clear increase in the electroosmotic mobility was observed with increasing pH. The electroosmotic mobility decreased with increasing ACN concentration. Poly(TFEM‐co‐EDMA) monolith prepared under optimized polymerization conditions was successfully used in the separation of alkylbenzenes and phenols by CEC. The best chromatographic separation for alkylbenzenes was performed with lower ACN concentrations ( i.e. 60% v/v) with respect to the common acrylic‐based CEC monoliths. The theoretical plate numbers up to 220 000 plates/m were achieved in the reversed phase separation of phenols. Poly(TFEM‐co‐EDMA) monolith also allowed the simultaneous separation of aniline and benzoic acid derivatives by a single run and by using a lower ACN concentration in the mobile phase with respect to the similar electrochromatographic separations. A stable retention behaviour in reversed phase separation of alkylbenzenes was obtained with the poly(TFEM‐co‐EDMA) monolith.