Maltodextrins Based Solid Membranes for the Enantioanalysis of L-Cysteine

Raluca-Ioana Stefan-van Staden, Luxolo Holo

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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ISSN: 1929-6037