Journal
FOOD CHEMISTRY
Volume 129, Issue 2, Pages 291-296Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2011.04.049
Keywords
Phenolic compounds; Biophenols; Olive mill wastewaters; Oleuropein; Ligstroside
Funding
- Fundacao para Ciencia e Tecnologia (FCT) [PTDC/AMB/69379/2006]
- Fundação para a Ciência e a Tecnologia [PTDC/AMB/69379/2006, PD/BD/135180/2017] Funding Source: FCT
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Olive mill wastewaters (OMW) are a potential source of biophenols, but they have a complex composition with many unknown phenolics. The analysis of purified methanol extracts from two Portuguese OMW by electrospray mass spectrometry in the negative mode showed [M-H](-) ions at m/z 539 and m/z 523, corresponding respectively to oleuropein and ligstroside isomers which contain the glucose unit linked to its aromatic moiety. Also, the fragmentation pathway of the [M-H](-) ions at m/z 863, 685 and 847 indicated the presence of a diglucoside derivative of the oleuropein isomer and of mono- and diglucosides of the ligstroside isomer, respectively. Moreover, the two OMW samples contained an elenoic derivative of the ion at m/z 685 and a degradation product (m/z 453) of the [M-H](-) ion at m/z 523. Future studies focusing on the abundance of these compounds on OMW, as well as their bioactivities, will determine their possible industrial exploitation. (C) 2011 Elsevier Ltd. All rights reserved.
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