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@article{1407959,
author = {Chocholoušková, Michaela and Komendová, Martina and Urban, Jiří},
article_location = {Amsterdam, Netherlands},
doi = {http://dx.doi.org/10.1016/j.chroma.2017.01.079},
keywords = {N-isopropylacrylamide; Polymer monoliths; Retention; Small molecules; Temperature},
language = {eng},
issn = {0021-9673},
journal = {Journal of Chromatography A},
title = {Retention of small molecules on polymethacrylate monolithic capillary columns},
url = {http://dx.doi.org/10.1016/j.chroma.2017.01.079},
volume = {1488},
year = {2017}
}
TY - JOUR
ID - 1407959
AU - Chocholoušková, Michaela - Komendová, Martina - Urban, Jiří
PY - 2017
TI - Retention of small molecules on polymethacrylate monolithic capillary columns
JF - Journal of Chromatography A
VL - 1488
SP - 85-92
EP - 85-92
PB - Elsevier
SN - 00219673
KW - N-isopropylacrylamide
KW - Polymer monoliths
KW - Retention
KW - Small molecules
KW - Temperature
UR - http://dx.doi.org/10.1016/j.chroma.2017.01.079
L2 - http://dx.doi.org/10.1016/j.chroma.2017.01.079
N2 - In this paper, the concentration of N-isopropylacrylamide in the polymerization mixture has been varied to prepare several polymethacrylate monolithic capillary columns. Polymer monoliths combining N-isopropylacrylamide with zwitterion monomer, as well as various dimethacrylate crosslinking monomers have been prepared and characterized. Uracil, thiourea, phenol, toluene, ethylbenzene, propylbenzene, and butylbenzene have been used to characterize retention of prepared capillary columns in the mobile phases with 40-95% of acetonitrile and at working temperatures ranging from 25 to 60 degrees C. By an optimization of six-parameter polynomial models we have found that the retention of small molecules is affected mainly by the concentration of the acetonitrile in the mobile phase with very low contribution of working temperature and combined effect of acetonitrile concentration and temperature. Concentration of the mobile phase controlled also enthalpy of the retention. On the other hand, entropic contribution was almost insensitive to the change of the mobile phase composition, especially for mobile phases containing more than 60% of acetonitrile. (C) 2017 Elsevier B.V. All rights reserved.
ER -
CHOCHOLOUŠKOVÁ, Michaela, Martina KOMENDOVÁ a Jiří URBAN. Retention of small molecules on polymethacrylate monolithic capillary columns. \textit{Journal of Chromatography A}. Amsterdam, Netherlands: Elsevier, 2017, roč.~1488, s.~85-92. ISSN~0021-9673. Dostupné z: https://dx.doi.org/10.1016/j.chroma.2017.01.079.
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