Abstract : Maltodextrins Based Solid Membranes for the Enantioanalysis of L-Cysteine

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Maltodextrins Based Solid Membranes for the Enantioanalysis of L-Cysteine
Pages 86-90
Raluca-Ioana Stefan-van Staden and Luxolo Holo

DOI: http://dx.doi.org/10.6000/1929-6037.2014.03.02.3

Published: 30 May 2014

 


Abstract: Three enantioselective membranes based on maltodextrins with different values of dextrose equivalent (DE) were proposed for the enantioanalysis of L-cysteine. The membranes were used for the design of potentiometric sensors. The slopes of the sensors were near-Nernstian (higher than 58.00mV/decade of concentration) with limits of detection of magnitude order of 10-11 and 10-12 mol/L. The surfaces of the membranes were stable for more than 6 months of continuous use. They can be renewed by polishing on alumina paper.

Keywords: L-cysteine, solid enantioselective membrane, maltodextrin, enantioselective, potentiometric membrane electrode.

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