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Effect of non-thermostated capillary inlet in affinity capillary electrophoresis: Uranyl-selenate system at variable temperatures
Sladkov V.
Journal of Chromatography A 1263 (2012) 189-193 - http://hal.in2p3.fr/in2p3-00763592
Physique/Physique/Chimie-Physique
Effect of non-thermostated capillary inlet in affinity capillary electrophoresis: Uranyl-selenate system at variable temperatures
V. Sladkov1, 2
1 :  IPNO - Institut de Physique Nucléaire d'Orsay
http://ipnweb.in2p3.fr
CNRS : UMR8608 – IN2P3 – Université Paris XI - Paris Sud
IPN - 15, rue Georges Clemenceau - 91406 ORSAY CEDEX
France
2 :  Université Paris-Sud - Paris 11
http://www.u-psud.fr/fr/index.html
Université Paris XI - Paris Sud
Université de Paris-Sud Bât. 425 91405 Orsay cedex
France
The influence of non-thermostated capillary inlet on accuracy of data obtained by affinity capillary electrophoresis is examined in the case of kinetically labile systems (with fast kinetics of equilibrium) at different temperatures. The system uranyl-selenate is studied in aqueous perchloric acid solutions (pH 2.5, ionic strength 0.05 mol l−1) in the temperature range from 15 °C to 55 °C. Moving of the sample through the non-thermostated inlet into the thermostated region of the capillary is used in order to avoid the influence of non efficiently thermostated short capillary inlet. The data on mobility values of uranyl and the values of stability constants obtained by this mode are compared with the data obtained in a traditionally used mode (injection in non-thermostated inlet region). The uranyl mobility values obtained by the two methods are different at temperature higher than 35 °C. However, the difference between stability constants obtained by the two methods is not significant (ambient temperature is 20 °C).

Articles dans des revues avec comité de lecture
2012
Journal of Chromatography A (J. Chromatogr.)
Publisher Elsevier
ISSN 0021-9673 
1263
189-193