| Literature DB >> 25442589 |
Onofrio Corona1, Margherita Squadrito2, Giorgia Vento3, Antonio Tirelli4, Rocco Di Stefano5.
Abstract
Sulphur dioxide (SO2) proved to increase absorbance at 280 nm of grape skin and seed extracts containing it, diluted with ethanol-HCl to assess total flavonoids and anthocyanins in the same analysis. Additional absorbance at 280 nm was also observed in acetone:H2O extracts, if the acetone had not completely evaporated before the extracts were diluted with a solvent. Flavonoids were correctly quantified in the extracts when SO2 or acetone were removed by solid-phase extraction with a C18 RP as sorbent and methanol as eluting solvent.Entities:
Keywords: Anthocyanins; Anthocyanins (PubChem CID: 5318979); Flavonoids; Polyphenols; Proanthocyanidins; Proanthocyanidins (PubChem CID: 108065); Sulphur dioxide; Sulphur dioxide (PubChem CID: 1119)
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Year: 2014 PMID： 25442589 DOI： 10.1016/j.foodchem.2014.09.125
Source DB: PubMed Journal: Food Chem ISSN： 0308-8146 Impact factor: 7.514