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Reference type: Journal
Authors: Chandran J, Shintu L, Caldarelli S
Article Title: Molecular signal suppression by in situ microextraction in nuclear magnetic resonance spectroscopy.
Publication date: 2014
Journal: Magnetic Resonance in Chemistry
Volume: 52
Issue: (11)
Page numbers: 694-698.
DOI: 10.1002/mrc.4120

Abstract: The detailed characterization of complex mixtures by NMR is often hampered by the presence of signals from uninformative compounds, the resonances of which overlap with those of the molecules of interest. We provide here a proof of principle for an approach to NMR signal suppression in complex samples using Molecularly Imprinted Polymers (MIPS). Addition of a few milligrams of polymer to a solution traps the target molecule in typical micromolar to millimolar concentration, thus achieving in situ signal suppression, without altering any other spectral features. This method minimized any manipulation or perturbation of the spectrum and was applied to a complex mixture of known compounds and to a plant extract, in both cases spiked with a compound (bisphenol A), which was subsequently removed by selective binding to a complementary MIP. What is described in this report is comparable with microextraction and may in due course be applied to a large number of analytical challenges. Copyright 2014 John Wiley & Sons, Ltd
Template and target information: bisphenol A, BPA
Author keywords: mixture analysis, signal suppression, Molecularly imprinted polymers, Nuclear magnetic resonance

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