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Statements

Subject Item
n2:RIV%2F00216208%3A11310%2F12%3A10120351%21RIV13-GA0-11310___
rdf:type
n10:Vysledek skos:Concept
rdfs:seeAlso
http://dx.doi.org/10.1002/elps.201100489
dcterms:description
A novel procedure for the determination of stability constants in systems with neutral analytes and charged complexation agents by affinity capillary electrophoresis was established. This procedure involves all necessary corrections to achieve precise and reliable data. Temperature, ionic strength, and viscosity corrections were applied. Based on the conductivity measurements, the average temperature of the background electrolyte in the capillary was kept at the constant value of 25 degrees C by decreasing the temperature of the cooling medium. The viscosity correction was performed using the viscosity ratio determined by an external viscosimeter. The electrophoretical measurements were performed, at first, at constant ionic strength. In this case, the increase of ionic strength caused by increasing complexation agent concentration was compensated by changing of the running buffer concentration. Subsequently the dependence of the analyte effective mobility on the complexation agent concentration was measured without the ionic strength compensation (at variable ionic strength). The new procedure for determination of the stability constants even from such data was established. These stability constants are in a very good agreement with those obtained at the constant ionic strength. The established procedure was applied for determination of the thermodynamic stability constants of (R, R)-(+)- and (S, S)-(-)-hydrobenzoin and R- and S-(3-bromo-2-methylpropan-1-ol) complexing with 6-monodeoxy-6-mono(3-hydroxy)propylamino-beta-cyclodextrin hydrochloride. A novel procedure for the determination of stability constants in systems with neutral analytes and charged complexation agents by affinity capillary electrophoresis was established. This procedure involves all necessary corrections to achieve precise and reliable data. Temperature, ionic strength, and viscosity corrections were applied. Based on the conductivity measurements, the average temperature of the background electrolyte in the capillary was kept at the constant value of 25 degrees C by decreasing the temperature of the cooling medium. The viscosity correction was performed using the viscosity ratio determined by an external viscosimeter. The electrophoretical measurements were performed, at first, at constant ionic strength. In this case, the increase of ionic strength caused by increasing complexation agent concentration was compensated by changing of the running buffer concentration. Subsequently the dependence of the analyte effective mobility on the complexation agent concentration was measured without the ionic strength compensation (at variable ionic strength). The new procedure for determination of the stability constants even from such data was established. These stability constants are in a very good agreement with those obtained at the constant ionic strength. The established procedure was applied for determination of the thermodynamic stability constants of (R, R)-(+)- and (S, S)-(-)-hydrobenzoin and R- and S-(3-bromo-2-methylpropan-1-ol) complexing with 6-monodeoxy-6-mono(3-hydroxy)propylamino-beta-cyclodextrin hydrochloride.
dcterms:title
Determination of stability constants of complexes of neutral analytes with charged cyclodextrins by affinity capillary electrophoresis Determination of stability constants of complexes of neutral analytes with charged cyclodextrins by affinity capillary electrophoresis
skos:prefLabel
Determination of stability constants of complexes of neutral analytes with charged cyclodextrins by affinity capillary electrophoresis Determination of stability constants of complexes of neutral analytes with charged cyclodextrins by affinity capillary electrophoresis
skos:notation
RIV/00216208:11310/12:10120351!RIV13-GA0-11310___
n10:predkladatel
n13:orjk%3A11310
n3:aktivita
n8:S n8:P n8:I n8:Z
n3:aktivity
I, P(GCP205/11/J043), S, Z(MSM0021620857)
n3:cisloPeriodika
6
n3:dodaniDat
n19:2013
n3:domaciTvurceVysledku
n6:9348336 n6:5129680 n6:5301386 n6:3899896
n3:druhVysledku
n5:J
n3:duvernostUdaju
n22:S
n3:entitaPredkladatele
n4:predkladatel
n3:idSjednocenehoVysledku
130638
n3:idVysledku
RIV/00216208:11310/12:10120351
n3:jazykVysledku
n14:eng
n3:klicovaSlova
Viscosity; Stability constant; Ionic strength; Charged cyclodextrins; Affinity capillary electrophoresis
n3:klicoveSlovo
n9:Viscosity n9:Charged%20cyclodextrins n9:Stability%20constant n9:Ionic%20strength n9:Affinity%20capillary%20electrophoresis
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[2EC64EABF154]
n3:nazevZdroje
Electrophoresis
n3:obor
n16:CB
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
4
n3:projekt
n12:GCP205%2F11%2FJ043
n3:rokUplatneniVysledku
n19:2012
n3:svazekPeriodika
33
n3:tvurceVysledku
Gaš, Bohuslav Zusková, Iva Svobodová, Jana Beneš, Martin
n3:wos
000303155700018
n3:zamer
n21:MSM0021620857
s:issn
0173-0835
s:numberOfPages
8
n7:doi
10.1002/elps.201100489
n18:organizacniJednotka
11310