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Proceedings title: ECS Transactions
Editors: Trulove P, De Long H
Publisher: The Electrochemical Society
Volume number: 13
Conference information: Physical and Analytical Electrochemistry (General) - 213th ECS Meeting

Abstract: Electrochemical detection and quantitation of small- to mediumsized molecules without easily accessible redox potentials is an evolving field that demands combinations of techniques and methods to resolve challenging chemical analysis issues. Solving complex analytical challenges requires at a minimum, techniques that possess specificity, stability and sensitivity. Molecularly imprinted polymers (MIPs) are proving very effective in the development of synthetic recognition systems and are of great interest in the field of electrochemical sensor technology. This study examines the selectivity of caffeine- and theobromine imprinted polypyrrole electrodes using pulsed amperometric detection (PAD). The selectivity was examined using theobromine and caffeine as competitive analytes. The recognition sites of the respective MIPs appear to possess sufficient binding affinities to enable quantitative determination up to equimolar amounts of competitive analyte. An alternative detection technique using electrochemical impedance spectroscopy is also reported as an alternative to PAD detection. © The Electrochemical Society
Template and target information: caffeine, theobromine