Journal
JOURNAL OF SEPARATION SCIENCE
Volume 35, Issue 12, Pages 1502-1505Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201200138
Keywords
Capillary electrochromatography; Hypercrosslinking; Ion adsorption; Polymer monolith
Categories
Funding
- Office of Science, Office of Basic Energy Sciences, Scientific User Facilities Division of the U.S. Department of Energy [DE-AC02-05CH11231]
- University of Macau [UL015/09-Y4]
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Both poly(styrene-co-vinylbenzyl chloride-co-divinylbenzene) and poly(4-methylstyrene-co-vinylbenzyl chloride-co-divinylbenzene) monolithic columns have been hypercrosslinked and for the first time used to achieve capillary electrochromatographic separations. Although these columns do not contain ionizable functionalities, electroosmotic flow was observed due to adsorption of ions from a buffer solution contained in the mobile phase on the surface of the hydrophobic polymer. An increase of more than one order of magnitude was observed with the use of both monolithic polymers. The hypercrosslinking reaction creates a large surface area thus enabling adsorption of a much larger number of ions. Alkylbenzenes were successfully separated using the hypercrosslinked monolithic columns.
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