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Effect of ion adsorption on CEC separation of small molecules using hypercrosslinked porous polymer monolithic capillary columns
Author(s) -
Chen XiaoJia,
Dinh Ngoc Phuoc,
Zhao Jing,
Wang YiTao,
Li ShaoPing,
Svec Frantisek
Publication year - 2012
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201200138
Subject(s) - divinylbenzene , alkylbenzenes , adsorption , polymer , chemistry , chloride , chemical engineering , styrene , capillary action , porosity , chromatography , copolymer , organic chemistry , materials science , catalysis , composite material , engineering
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.