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Green coffee oil analysis by high-resolution nuclear magnetic resonance spectroscopy.

D'Amelio, N; De Angelis, E; Navarini, L; Schievano, E; Mammi, S; (2013) Green coffee oil analysis by high-resolution nuclear magnetic resonance spectroscopy. Talanta , 110 pp. 118-127. 10.1016/j.talanta.2013.02.024.

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Abstract

In this work, we show how an extensive and fast quantification of the main components in green coffee oil can be achieved by NMR, with minimal sample manipulation and use of organic solvents. The approach is based on the integration of characteristic NMR signals, selected because of their similar relaxation properties and because they fall in similar spectral regions, which minimizes offset effects. Quantification of glycerides, together with their fatty acid components (oleic, linoleic, linolenic and saturated) and minor species (caffeine, cafestol, kahweol and 16-O-methylcafestol), is achieved in less than 1h making use of (1)H and (13)C spectroscopy. The compositional data obtained are in reasonable agreement with classical chromatographic analyses.

Type: Article
Title: Green coffee oil analysis by high-resolution nuclear magnetic resonance spectroscopy.
Location: Netherlands
DOI: 10.1016/j.talanta.2013.02.024
Keywords: Chromatography, Gas, Coffee, Fatty Acids, Glycerides, Magnetic Resonance Spectroscopy
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences > Structural and Molecular Biology
URI: http://discovery.ucl.ac.uk/id/eprint/1392907
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