Electrolysis in electromembrane extractions. Effects on extraction performance for substituted phenols

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081715%3A_____%2F14%3A00438022" target="_blank" >RIV/68081715:_____/14:00438022 - isvavai.cz</a>
Result on the web
<a href="http://www.ce-ce.org/CECE2014/CECE%202014%20proceedings_full.pdf" target="_blank" >http://www.ce-ce.org/CECE2014/CECE%202014%20proceedings_full.pdf</a>
DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Electrolysis in electromembrane extractions. Effects on extraction performance for substituted phenols
Original language description
Electrolysis was shown to play a significant role in electromembrane extraction (EME) performance. Alkaline acceptors, prepared as 1 ? 10 mM CsOH solutions, suffered from electrolytic reactions during EMEs of substituted phenols and their pH values decreased by more than 8 units after 40 min of EMEs at 50 V. As a consequence, serious deterioration of EME performance was observed for weak and medium-strong acidic phenols due to their compromised ionization and their subsequent back-extraction into organic phase and donor solution. Application of acceptor solutions consisting of high concentrations of weak bases (e.g. 500 mM ethanolamine) ensured similar initial pH conditions as for the alkali-metal hydroxide based solutions, moreover, significantly better tolerance to electrolysis-induced effects was obtained. Stable pH of acceptor solutions was achieved as well as an improved EME performance for all analytes over the entire extraction period.
Czech name
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Czech description
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Project
<a href="/en/project/GA13-05762S" target="_blank" >GA13-05762S: Theory, methodology and development of progressive chemical methods for analysis of trace components and complex samples by capillary electrophoresis.</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
CECE 2014. 11th International Interdisciplinary Meeting on Bioanalysis
ISBN
978-80-904959-2-0
ISSN
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e-ISSN
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Number of pages
3
Pages from-to
394-396
Publisher name
Institute of Analytical Chemistry AS CR
Place of publication
Brno
Event location
Brno
Event date
Oct 20, 2014
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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