Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 430886
Title Enhanced NMR-based profiling of polyphenols in commercially available grape juices using solid-phase extraction
Author(s) Savage, A.K.; Duynhoven, J.P.M. van; Tucker, G.; Daykin, C.
Source Magnetic Resonance in Chemistry 49 (2011)1. - ISSN 0749-1581 - p. S27 - S36.
Department(s) Biophysics
Publication type Refereed Article in a scientific journal
Publication year 2011
Keyword(s) nuclear-magnetic-resonance - fruit juices - h-1-nmr spectroscopy - liquid-extraction - by-products - green tea - wine - quality - identification - chromatography
Abstract Grapes and related products, such as juices, and in particular, their polyphenols, have previously been associated with many health benefits, such as protection against cardiovascular disease. Within grapes, a large range of structurally diverse polyphenols can be present, and their characterisation stands as a challenge. 1H NMR spectroscopy in principle would provide a rapid, nondestructive and straightforward method for profiling of polyphenols. However, polyphenol profiling and identification in grape juices is hindered because of signals of prevailing carbohydrates causing spectral overlap and compromising dynamic range. This study describes the development of an extraction method prior to analysis using 1H NMR spectroscopy, which can, potentially, significantly increase the number of detectable polyphenols and aid their identification, by reduction of signal overlap and selective removal of heavily dominating compounds such as sugars.
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