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Advisor(s)
Abstract(s)
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.
Description
Keywords
Phenolic compounds Biophenols Olive mill wastewaters Oleuropein Ligstroside
Citation
Cardoso, Susana M.; Falcão, Soraia I.; Peres, António M.; Domingues, Maria R.M. (2011) – Oleuropein/ligstroside isomers and their derivatives in Portuguese olive mill wastewaters. Food Chemistry. ISSN 0308-8146. 129:2, p. 291-296.
Publisher
Elsevier