A Targeted Approach by High Resolution Mass Spectrometry to Reveal New Compounds in Raisins
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2020
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Abstract
Raisins are dried grapes mostly obtained from cultivars of Vitis vinifera L. and are extensively consumed worldwide. They are rich in bioactive compounds such as polyphenols, which are associated with a broad range of health benefits. The aim of the present study was to compare the phenolic profiles of three different raisin varieties (Thompson seedless, Muscat, and sultanas). Total polyphenols (TPs) were evaluated by the Folin−Ciocalteu (F−C) assay and significant differences were observed among all raisin varieties. Furthermore, liquid chromatography coupled with electrospray ionization hybrid linear ion trap quadrupole-Orbitrap-mass spectrometry (LC/ESI-LTQ-Orbitrap-MS) was employed for the comprehensive identification of phenolic constituents. A total of 45 compounds were identified, including hydroxybenzoic and hydroxycinnamic acids, flavanoids, flavonoids, flavonols, flavones, and stilbenoids. The three varieties of raisins showed a similar phenolic profile, although the highest number of phenolic compounds was identified in Muscat raisins owing to the proanthocyanidins extracted from their seeds, while stilbenoids were not detected in the Thompson variety.
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escobaravello2020amolecules
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| Authors | Escobar-Avello, Danilo;Olmo-Cunillera, Alexandra;Lozano-Castellón, Julián;Marhuenda-Muñoz, María;Vallverdú-Queralt, Anna; |
| Journal | molecules |
| Year | 2020 |
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