| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7594238 | Food Chemistry | 2015 | 6 Pages |
Abstract
Sulphur dioxide (SO2) proved to increase absorbance at 280Â 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 280Â 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.
Related Topics
Physical Sciences and Engineering
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Analytical Chemistry
Authors
Onofrio Corona, Margherita Squadrito, Giorgia Vento, Antonio Tirelli, Rocco Di Stefano,