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Reference type: Journal
Authors: Prasad BB, Madhuri R, Tiwari MP, Sharma PS
Article Title: Enantioselective recognition of d- and l-tryptophan by imprinted polymer-carbon composite fiber sensor.
Publication date: 2010
Journal: Talanta
Volume: 81
Issue: (1-2)
Page numbers: 187-196.
DOI: 10.1016/j.talanta.2009.11.055
Alternative URL: http://www.sciencedirect.com/science/article/B6THP-4XTG3B9-3/2/977c4cf6fb2332a22a87c4e94782e739

Abstract: Electrochemical sensors demonstrating enantioselectivity to tryptophan enantiomers, with high selectivity and sensitivity, were fabricated by the use of a monolithic fiber of molecularly imprinted polymer-carbon composite. The recognition mechanism and performance of these sensors were evaluated by differential pulse anodic stripping voltammetry. The sensor imprinted for l-tryptophan not only discriminated the target from its analogues and other amino acids but also responded specifically in racemic mixture in aqueous, biological, and pharmaceutical samples. The binding kinetics of l-tryptophan was also established with the help of anodic stripping cyclic voltammetry and chronocoulometry. The detection limit for l-tryptophan was as low as 0.24ángámL-1 (signal/noiseá=á3) which is appropriate for biomarking diseases, caused by an acute tryptophan-depletion, in clinical setting
Template and target information: l-tryptophan
Author keywords: enantioselectivity, Molecularly imprinted polymer-carbon composite, Fiber sensor, Differential pulse anodic stripping voltammetry, l- and d-Tryptophan

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