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Current Pharmaceutical Analysis

Editor-in-Chief

ISSN (Print): 1573-4129
ISSN (Online): 1875-676X

Cyclodextrins Based Enantioselective, Potentiometric Membrane Electrodes (EPME) and their Applications for Enantioanalysis of L-Cysteine in Urine

Author(s): Raluca-Ioana Stefan-van Staden, Luxolo Holo and Jacobus F. van Staden

Volume 7, Issue 4, 2011

Page: [258 - 261] Pages: 4

DOI: 10.2174/157341211797457998

Price: $65

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Abstract

Four enantioselective, potentiometric membrane electrodes based on carbon paste impregnated with α-, β-, 2- hydroxyl-3-trimethylammoniopropyl -β- (as chloride salt) and γ-cyclodextrins are proposed for the enantioanalysis of Lcysteine. The proposed electrodes exhibited near-Nernstian slopes in a wide linear concentration range: 10-10 - 10-3 mol/L, with very low detection limits, near 10-11 mol/L. The surfaces of the electrodes are easily renewable by simply polishing on an alumina paper.

Keywords: L-cysteine, Cyclodextrin, Direct potentiometry, Enantioanalysis, Potentiometric Selectivity Coefficient, PVP, D-Cys, Liquid chromatography, Chemiluminescence, Capillary electrophoresis


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