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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F13%3A39896229" target="_blank" >RIV/00216275:25310/13:39896229 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S002196731301217X" target="_blank" >http://www.sciencedirect.com/science/article/pii/S002196731301217X</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.chroma.2013.08.005" target="_blank" >10.1016/j.chroma.2013.08.005</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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 molecula

Název v anglickém jazyce

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

Popis výsledku anglicky

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 molecula

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CB - Analytická chemie, separace

OECD FORD obor

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Projekt

<a href="/cs/project/GAP206%2F12%2F0398" target="_blank" >GAP206/12/0398: Dvourozměrné separace v kapalných médiích</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Chromatography A

ISSN

0021-9673

e-ISSN

—

Svazek periodika

1317

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

49-58

Kód UT WoS článku

000327229600007

EID výsledku v databázi Scopus

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