About: Combined Effects of Mobile Phase Composition and Temperature on the Retention of Phenolic Antioxidants on an Octylsilica Polydentate Column

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About: Combined Effects of Mobile Phase Composition and Temperature on the Retention of Phenolic Antioxidants on an Octylsilica Polydentate Column Goto Sponge NotDistinct Permalink

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Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://www.sciencedirect.com/science/article/pii/S002196731301217X
Description	Combined effects of temperature and mobile-phase composition on retention and separation selectivity of phenolic acids and flavonoid compounds were studied in liquid chromatography on a polydentate Blaze C-8 silica based column. The temperature effects on the retention can be described by van't Hoff equation. Good linearity of Ink versus 1/T graphs indicates that the retention is controlled by a single mechanism in the mobile phase and temperature range studied. Enthalpic and entropic contributions to the retention were calculated from the regression lines. Generally, enthalpic contributions control the retention at lower temperatures and in mobile phases with lower concentrations of methanol in water. Semi-empirical retention models describe the simultaneous effects of temperature and the volume fraction of the organic solvent in the mobile phase. Using the linear free energy-retention model, selective dipolarity/polarizability, hydrogen-bond donor, hydrogen-bond acceptor and molecular size contributions to retention were estimated at various mobile phase compositions and temperatures. In addition to mobile phase gradients, temperature programming can be used to reduce separation times. Combined effects of temperature and mobile-phase composition on retention and separation selectivity of phenolic acids and flavonoid compounds were studied in liquid chromatography on a polydentate Blaze C-8 silica based column. The temperature effects on the retention can be described by van't Hoff equation. Good linearity of Ink versus 1/T graphs indicates that the retention is controlled by a single mechanism in the mobile phase and temperature range studied. Enthalpic and entropic contributions to the retention were calculated from the regression lines. Generally, enthalpic contributions control the retention at lower temperatures and in mobile phases with lower concentrations of methanol in water. Semi-empirical retention models describe the simultaneous effects of temperature and the volume fraction of the organic solvent in the mobile phase. Using the linear free energy-retention model, selective dipolarity/polarizability, hydrogen-bond donor, hydrogen-bond acceptor and molecular size contributions to retention were estimated at various mobile phase compositions and temperatures. In addition to mobile phase gradients, temperature programming can be used to reduce separation times. (en)
Title	Combined Effects of Mobile Phase Composition and Temperature on the Retention of Phenolic Antioxidants on an Octylsilica Polydentate Column Combined Effects of Mobile Phase Composition and Temperature on the Retention of Phenolic Antioxidants on an Octylsilica Polydentate Column (en)
skos:prefLabel	Combined Effects of Mobile Phase Composition and Temperature on the Retention of Phenolic Antioxidants on an Octylsilica Polydentate Column Combined Effects of Mobile Phase Composition and Temperature on the Retention of Phenolic Antioxidants on an Octylsilica Polydentate Column (en)
skos:notation	RIV/00216275:25310/13:39896229!RIV14-GA0-25310___
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GAP206/12/0398)
http://linked.open...iv/cisloPeriodika	1
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Jandera, Pavel Vyňuchalová, Kateřina
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Pardubice / Fakulta chemicko-technologická
http://linked.open...dnocenehoVysledku	65974
http://linked.open...ai/riv/idVysledku	RIV/00216275:25310/13:39896229
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	temperature effects; gradient elution; phenolic compounds; polydentate column (en)
http://linked.open.../riv/klicoveSlovo	phenolic compounds polydentate column temperature effects gradient elution
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[2FEE786318BF]
http://linked.open...i/riv/nazevZdroje	Journal of Chromatography A
http://linked.open...in/vavai/riv/obor	CB
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	Two-dimensional separations in liquid media
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	1317
http://linked.open...iv/tvurceVysledku	Jandera, Pavel Vyňuchalová, Kateřina Nečilová, Kateřina
http://linked.open...ain/vavai/riv/wos	000327229600007
issn	0021-9673
number of pages	10 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.chroma.2013.08.005
http://localhost/t...ganizacniJednotka	25310

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