title: Effect of ion adsorption on CEC separation of small molecules using hypercrosslinked porous polymer monolithic capillary columns.
abstract: 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.
authors: State Key Laboratory of Quality Research in Chinese Medicine, University of Macau, Macao SAR, P R China.
authors: Xiao-Jia
authors: XJ
authors: Chen
authors: Ngoc Phuoc
authors: NP
authors: Dinh
authors: Jing
authors: J
authors: Zhao
authors: Yi-Tao
authors: YT
authors: Wang
authors: Shao-Ping
authors: SP
authors: Li
authors: Frantisek
authors: F
authors: Svec
mesh_terms: D000327:Adsorption; D001554:Benzene / Q000737:chemistry*; D053801:Capillary Electrochromatography / Q000295:instrumentation* / Q000379:methods; D007477:Ions; D011108:Polymers / Q000737:chemistry*; D016062:Porosity; D012117:Resins, Synthetic / Q000737:chemistry
chemical_list: D007477:Ions; D011108:Polymers; D012117:Resins, Synthetic; D001554:Benzene