New option for decreasing of concentration limit of detection in electrophoresis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F17%3A43912627" target="_blank" >RIV/62156489:43210/17:43912627 - isvavai.cz</a>

Výsledek na webu

<a href="https://mnet.mendelu.cz/mendelnet2017/mnet_2017_full.pdf" target="_blank" >https://mnet.mendelu.cz/mendelnet2017/mnet_2017_full.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

New option for decreasing of concentration limit of detection in electrophoresis

Popis výsledku v původním jazyce

A hyphenated method consisting of transient electrokinetic dosing on-line coupled to isotachophoretic analysis was developed for the pre-concentration, pre-separation and analytical determination of a model substance - anionic herbicide glyphosate (gly) - in aqueous samples containing very low concentration of the analyte of interest. Various parameters were investigated in the framework of an optimisation study; the aim was to reach minimal concentration limit of detection decreasing in minimum time. The developed method consists of 2 phases. In the first one, a sample with addition of convenient buffer (dosing electrolyte) is electrokinetically dosed to the isotachophoretic column with proper leading electrolyte. During the dosing time, a moving-boundary electrophoresis zone of accumulated sample is created in the column and it is slowly moving through column. The accumulation of zone is proportional to the time and driving current and to the composition of dosing electrolyte. After some time of accumulation of the zone, dosing electrolyte is replaced with terminating one. Now, the regular isotachophoretic separation and analysis starts. The electrolyte composition and the dosing time were thoroughly optimized and 14 fold of accumulation was reached in 25 minutes in comparison to classical isotachophoretic analysis. The method is simple and applicable to all commercial isotachophoretic analysers.

Název v anglickém jazyce

New option for decreasing of concentration limit of detection in electrophoresis

Popis výsledku anglicky

A hyphenated method consisting of transient electrokinetic dosing on-line coupled to isotachophoretic analysis was developed for the pre-concentration, pre-separation and analytical determination of a model substance - anionic herbicide glyphosate (gly) - in aqueous samples containing very low concentration of the analyte of interest. Various parameters were investigated in the framework of an optimisation study; the aim was to reach minimal concentration limit of detection decreasing in minimum time. The developed method consists of 2 phases. In the first one, a sample with addition of convenient buffer (dosing electrolyte) is electrokinetically dosed to the isotachophoretic column with proper leading electrolyte. During the dosing time, a moving-boundary electrophoresis zone of accumulated sample is created in the column and it is slowly moving through column. The accumulation of zone is proportional to the time and driving current and to the composition of dosing electrolyte. After some time of accumulation of the zone, dosing electrolyte is replaced with terminating one. Now, the regular isotachophoretic separation and analysis starts. The electrolyte composition and the dosing time were thoroughly optimized and 14 fold of accumulation was reached in 25 minutes in comparison to classical isotachophoretic analysis. The method is simple and applicable to all commercial isotachophoretic analysers.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10403 - Physical chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

MendelNet 2017: Proceedings of International PhD Students Conference

ISBN

978-80-7509-529-9

ISSN

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e-ISSN

neuvedeno

Počet stran výsledku

5

Strana od-do

884-888

Název nakladatele

Mendelova univerzita v Brně

Místo vydání

Brno

Místo konání akce

Brno

Datum konání akce

8. 11. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000440194500158