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Reference type: Journal
Authors: Grosu S, Gorski W
Article Title: Molecular imprinting of antibiotic films for electroanalysis of the dopamine/ascorbate system.
Publication date: 2003
Journal: Indian Journal of Chemistry Section A-Inorganic Bio-Inorganic Physical Theoretical & Analytical Chemistry
Volume: 42
Issue: (4)
Page numbers: 758-763.

Abstract: Molecular films of a natural antibiotic lasalocid A have been cast on the surface of glassy carbon electrodes and used for the differentiation of electrochemical signals in the model system composed of dopamine and ascorbate. The best signal resolution is obtained at the films that were prepared by evaporating solvent from a chloroform solution of lasalocid that was equilibrated with an aqueous solution of dopamine. The improved selectivity of such films is ascribed to their enhanced hydrophobicity. The latter is hypothesized to be the result of lasalocid's compact cyclic conformation, which was imprinted in the solid films by the complexation with dopamine. When operated at a constant potential of 0.20 V, the lasalocid- based dopamine sensors are free of interferences from ascorbate and displayed low detection limits (similar to70 nM dopamine, S/N=3) in conjunction with fast response times (similar to0.4 s)


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