Enantioselective potentiometric membrane electrodes based on α-, β- and γ-cyclodextrins as chiral selectors for the assay of l-proline

Novel enantioselective, potentiometric membrane electrodes based on carbon paste impregnated with α-, β- and γ-cyclodextrins are reported. Response characteristics showed that the proposed electrodes could be reliably used in the assay of l-proline ( l-pro), with the best enantioselectivity and time...

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Published in:Talanta (Oxford) 2005-04, Vol.66 (2), p.501-504
Main Authors: Ozoemena, Kenneth I., Stefan, Raluca-Ioana
Format: Article
Language:English
Subjects:
Enantioanalysis
Enantioselective, potentiometric membrane electrode
l-Proline
α-, β- and γ-Cyclodextrins
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Stefan, Raluca-Ioana
description Novel enantioselective, potentiometric membrane electrodes based on carbon paste impregnated with α-, β- and γ-cyclodextrins are reported. Response characteristics showed that the proposed electrodes could be reliably used in the assay of l-proline ( l-pro), with the best enantioselectivity and time-stability exhibited by α-cyclodextrin. The enantioselective, potentiometric membrane electrodes based on the proposed unsubstituted cyclodextrins (CDs) showed lower detection limits (in the region of 10 −10 to 10 −9 mol L −1) than the one previously studied, based on β-cyclodextrin derivative [R.I. Stefan, J.F. van Staden, H.Y. Aboul-Enein, Anal. Lett. 31 (1998) 1787–1794]. The surfaces of the electrodes are easily renewable by simply polishing on an alumina paper.
doi_str_mv 10.1016/j.talanta.2004.11.024
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subjects Enantioanalysis
Enantioselective, potentiometric membrane electrode
l-Proline
α-, β- and γ-Cyclodextrins
title Enantioselective potentiometric membrane electrodes based on α-, β- and γ-cyclodextrins as chiral selectors for the assay of l-proline
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