Počet záznamů: 1
Electrolysis in electromembrane extractions. Effects on extraction performance for substituted phenols
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SYSNO ASEP 0438022 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Electrolysis in electromembrane extractions. Effects on extraction performance for substituted phenols Tvůrce(i) Šlampová, Andrea (UIACH-O) RID
Kubáň, Pavel (UIACH-O) RID, ORCID
Boček, Petr (UIACH-O) RIDCelkový počet autorů 3 Zdroj.dok. CECE 2014. 11th International Interdisciplinary Meeting on Bioanalysis. - Brno : Institute of Analytical Chemistry AS CR, 2014 / Foret F. ; Křenková J. ; Drobníková I. ; Guttman A. ; Klepárník K. - ISBN 978-80-904959-2-0 Rozsah stran s. 394-396 Poč.str. 3 s. Forma vydání Tištěná - P Akce CECE 2014. International Interdisciplinary Meeting on Bioanalysis /11./ Datum konání 20.10.2014-22.10.2014 Místo konání Brno Země CZ - Česká republika Typ akce WRD Jazyk dok. eng - angličtina Země vyd. CZ - Česká republika Klíč. slova electromembrane extraction ; electrolysis ; capillary electrophoresis Vědní obor RIV CB - Analytická chemie, separace CEP GA13-05762S GA ČR - Grantová agentura ČR Institucionální podpora UIACH-O - RVO:68081715 UT WOS 000354547400127 Anotace 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. Pracoviště Ústav analytické chemie Kontakt Iveta Drobníková, drobnikova@iach.cz, Tel.: 532 290 234 Rok sběru 2015 Elektronická adresa http://www.ce-ce.org/CECE2014/CECE%202014%20proceedings_full.pdf
Počet záznamů: 1