EOF in monolithic poly(styrene-co-divinylbenzene) capillary columns

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F09%3A00008422" target="_blank" >RIV/00216275:25310/09:00008422 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

EOF in monolithic poly(styrene-co-divinylbenzene) capillary columns

Popis výsledku v původním jazyce

In this paper, we present the result of our study on generation of EOF on uncharged poly(styrene-co-divinylbenzene)-based monolithic capillary columns. Three types of neutral monoliths were used: unmodified poly(styrene-co-divinylbenzene) and two modified with octadecyl chains: using grafting process or Friedel?Crafts reaction. The electroosmotic mobilities versus pH profiles are compared, as well as molecular modeling using HyperChem software was employed to describe the observed phenomena. The mobility of EOF was almost independent of pH when pH was increased from 2.5 to 9.5 during the consecutive experiments; however, it decreased significantly when pH was decreasing between these values. The modeling has shown that the buffer molecules can be attracted by the neutral polystyrene surface only in the presence of water molecules, thus creating a negatively charged layer.

Název v anglickém jazyce

EOF in monolithic poly(styrene-co-divinylbenzene) capillary columns

Popis výsledku anglicky

In this paper, we present the result of our study on generation of EOF on uncharged poly(styrene-co-divinylbenzene)-based monolithic capillary columns. Three types of neutral monoliths were used: unmodified poly(styrene-co-divinylbenzene) and two modified with octadecyl chains: using grafting process or Friedel?Crafts reaction. The electroosmotic mobilities versus pH profiles are compared, as well as molecular modeling using HyperChem software was employed to describe the observed phenomena. The mobility of EOF was almost independent of pH when pH was increased from 2.5 to 9.5 during the consecutive experiments; however, it decreased significantly when pH was decreasing between these values. The modeling has shown that the buffer molecules can be attracted by the neutral polystyrene surface only in the presence of water molecules, thus creating a negatively charged layer.

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

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2009

Kód důvěrnosti údajů

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

Název periodika

Electrophoresis

ISSN

0173-0835

e-ISSN

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Svazek periodika

30

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

6

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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