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Surfactant‐coated single‐walled carbon nanotubes as a novel pseudostationary phase in capillary EKC
Author(s) -
Suárez Beatriz,
Simonet Bartolomé M.,
Cárdenas Soledad,
Valcárcel Miguel
Publication year - 2007
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.200600395
Subject(s) - carbon nanotube , pulmonary surfactant , capillary action , electrolyte , nanotechnology , phase (matter) , materials science , nanotube , resolution (logic) , chemistry , chemical engineering , electrode , organic chemistry , composite material , artificial intelligence , computer science , engineering , biochemistry
The analytical potential of the use of surfactant‐coated single‐walled carbon nanotubes (SC‐SWNTs) as pseudostationary phase in CE is described. The pseudostationary phase shows an efficient alternative in enhancing electrochromatographic resolution of compounds which are capable of interacting with a nanotube surface, such as aromatic compounds. In general, the resolution is enhanced by increasing nanotube concentration in the buffer but the maximum amount of SWNTs that can be added to background electrolyte was found limited by compatibility with the UV/visible detection. As an alternative, a low‐extension partial filling was used, consisting of the introduction into the capillary of concentrated SC‐SWNT, just before the sample, with a plug length similar to the sample one. This has been showed as a reliable procedure in increasing resolution and sensitivity by sweeping phenomena. Finally, the potential of SC‐SWNTs to perform chiral separations is discussed.