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Statements

Subject Item
n2:RIV%2F61989592%3A15310%2F13%3A33147305%21RIV14-GA0-15310___
rdf:type
skos:Concept n15:Vysledek
dcterms:description
Separation of enantiomers represents an extremely important task in the field of analytical chemistry. This paper contributes to the field of the on-line preconcentration of enantiomers by developing a novel setup based on the electrokinetic accumulation of ketoprofen enantiomers on the pH boundary followed by enantioselective mobilization by a mixture of SDS, sulfated-beta-cyclodextrin (S-beta-CD), and trimethyl-beta-cyclodextrin (TM-beta-CD). Under the best conditions, where the injection electrolyte was composed of 50 mmol L-1 borate/NaOH pH 9.5 with 60% (v/v) methanol, the background electrolyte contained 50 mmol L-1 phosphate/NaOH pH 2.5, and the mobilization electrolyte consisted of 50 mmol L-1 phosphate/NaOH pH 2.5 with 4.0% (w/v) S-beta-CD, 0.5% (w/v) TM-beta-CD, and 20 mmol L-1 SDS, the determination of nanomolar concentration levels of ketoprofen enantiomers was successful by using micellar electrokinetic chromatography with a common UV detection. LODs were 2.5 nmol L-1 and 3.4 nmol L-1, which represent enhancement factors of 9921 and 8529, respectively. The method was also applied to the determination of ketoprofen enantiomers in waste water samples by using simple filtration as a clean-up step. Here, the recovery of ketoprofen enantiomers was 91% at the concentration level of 5x10(-9) mol L-1. Separation of enantiomers represents an extremely important task in the field of analytical chemistry. This paper contributes to the field of the on-line preconcentration of enantiomers by developing a novel setup based on the electrokinetic accumulation of ketoprofen enantiomers on the pH boundary followed by enantioselective mobilization by a mixture of SDS, sulfated-beta-cyclodextrin (S-beta-CD), and trimethyl-beta-cyclodextrin (TM-beta-CD). Under the best conditions, where the injection electrolyte was composed of 50 mmol L-1 borate/NaOH pH 9.5 with 60% (v/v) methanol, the background electrolyte contained 50 mmol L-1 phosphate/NaOH pH 2.5, and the mobilization electrolyte consisted of 50 mmol L-1 phosphate/NaOH pH 2.5 with 4.0% (w/v) S-beta-CD, 0.5% (w/v) TM-beta-CD, and 20 mmol L-1 SDS, the determination of nanomolar concentration levels of ketoprofen enantiomers was successful by using micellar electrokinetic chromatography with a common UV detection. LODs were 2.5 nmol L-1 and 3.4 nmol L-1, which represent enhancement factors of 9921 and 8529, respectively. The method was also applied to the determination of ketoprofen enantiomers in waste water samples by using simple filtration as a clean-up step. Here, the recovery of ketoprofen enantiomers was 91% at the concentration level of 5x10(-9) mol L-1.
dcterms:title
Separation of ketoprofen enantiomers at nanomolar concentration levels by micellar electrokinetic chromatography with on-line electrokinetic preconcentration Separation of ketoprofen enantiomers at nanomolar concentration levels by micellar electrokinetic chromatography with on-line electrokinetic preconcentration
skos:prefLabel
Separation of ketoprofen enantiomers at nanomolar concentration levels by micellar electrokinetic chromatography with on-line electrokinetic preconcentration Separation of ketoprofen enantiomers at nanomolar concentration levels by micellar electrokinetic chromatography with on-line electrokinetic preconcentration
skos:notation
RIV/61989592:15310/13:33147305!RIV14-GA0-15310___
n15:predkladatel
n16:orjk%3A15310
n3:aktivita
n17:S n17:P
n3:aktivity
P(ED2.1.00/03.0058), P(EE2.3.20.0018), P(GAP206/12/1150), S
n3:cisloPeriodika
3
n3:dodaniDat
n9:2014
n3:domaciTvurceVysledku
n4:2465205 Znaleziona, Joanna n4:2098628 n4:2008998 n4:4069218 n4:6267408
n3:druhVysledku
n14:J
n3:duvernostUdaju
n12:S
n3:entitaPredkladatele
n18:predkladatel
n3:idSjednocenehoVysledku
104732
n3:idVysledku
RIV/61989592:15310/13:33147305
n3:jazykVysledku
n19:eng
n3:klicovaSlova
Ketoprofen; On-line preconcentration; Chiral separation; Capillary electrophoresis
n3:klicoveSlovo
n5:Ketoprofen n5:On-line%20preconcentration n5:Capillary%20electrophoresis n5:Chiral%20separation
n3:kodStatuVydavatele
PL - Polská republika
n3:kontrolniKodProRIV
[F83BE3DED0D4]
n3:nazevZdroje
Central European Journal of Chemistry
n3:obor
n20:CB
n3:pocetDomacichTvurcuVysledku
6
n3:pocetTvurcuVysledku
7
n3:projekt
n7:GAP206%2F12%2F1150 n7:EE2.3.20.0018 n7:ED2.1.00%2F03.0058
n3:rokUplatneniVysledku
n9:2013
n3:svazekPeriodika
11
n3:tvurceVysledku
Lošťáková, Markéta Ševčík, Juraj Petr, Jan Knob, Radim Maier, Vítězslav Ginterová, Pavlína Znaleziona, Joanna
n3:wos
000312878400003
s:issn
1895-1066
s:numberOfPages
6
n13:doi
10.2478/s11532-012-0177-0
n6:organizacniJednotka
15310