Influencing electroosmotic flow and selectivity in open tubular electrochromatography by tetrakis(pentafluorophenyl)porphyrin as capillary wall modifier

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F03%3A00007432" target="_blank" >RIV/60461373:22340/03:00007432 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388963:_____/03:57030067 RIV/67985823:_____/03:57030067

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Influencing electroosmotic flow and selectivity in open tubular electrochromatography by tetrakis(pentafluorophenyl)porphyrin as capillary wall modifier

Popis výsledku v původním jazyce

A physically adsorbed and covalently bonded prophyrin derivative, 5.10.15.20-tetrakis(pentafluorophenyl)porphyrin, H2TPFPP, has been used as a fused-silica capillary wall modifier in open tubular capillary electrochromatography (OT-CEC), and its influence on the electroosmotic flow (EOF) velocity and on the selectivity of TO-CEC separations of a set of model aromatic carobxylic acids has been tested. Whereas most of the coatings of this cattegory bring about an increase in selectivity with a concomitantslow down of the EOF,H2TPFPP/ coating, depending of pH of the background electrolyte used, resulted both in decreasing of EOF at pH 8,5 by 5% and in increasing of EOF by 10-43% at pH 6 and 5, respectively.The separation efficiency and the resolution of aromatic carboxylic acids separation in coated capillaries, namely in that one with covalent coating, were better than in the bure fused-silica capillary. The perspectives of H2TPFPP as calillary wall modifier are visualized in introducing

Název v anglickém jazyce

Influencing electroosmotic flow and selectivity in open tubular electrochromatography by tetrakis(pentafluorophenyl)porphyrin as capillary wall modifier

Popis výsledku anglicky

A physically adsorbed and covalently bonded prophyrin derivative, 5.10.15.20-tetrakis(pentafluorophenyl)porphyrin, H2TPFPP, has been used as a fused-silica capillary wall modifier in open tubular capillary electrochromatography (OT-CEC), and its influence on the electroosmotic flow (EOF) velocity and on the selectivity of TO-CEC separations of a set of model aromatic carobxylic acids has been tested. Whereas most of the coatings of this cattegory bring about an increase in selectivity with a concomitantslow down of the EOF,H2TPFPP/ coating, depending of pH of the background electrolyte used, resulted both in decreasing of EOF at pH 8,5 by 5% and in increasing of EOF by 10-43% at pH 6 and 5, respectively.The separation efficiency and the resolution of aromatic carboxylic acids separation in coated capillaries, namely in that one with covalent coating, were better than in the bure fused-silica capillary. The perspectives of H2TPFPP as calillary wall modifier are visualized in introducing

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2003

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

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Svazek periodika

990

Číslo periodika v rámci svazku

990

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

111-119

Kód UT WoS článku

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EID výsledku v databázi Scopus

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