Table 1.
Grape varieties included in study, their provenience and codes used.
| Var. | Cultivar | Origin | Cod |
|---|---|---|---|
| Red table grapes | Pasiga | Conegliano Veneto, Italy | PA |
| Red Flame | Conegliano Veneto, Italy | RF | |
| Red Globe | Beja, Portugal | RG | |
| Beauty Seedless | Conegliano Veneto, Italy | BEs | |
| King's Ruby Seedless | Conegliano Veneto, Italy | KRs | |
| Nerona | Conegliano Veneto, Italy | NR | |
| Red wine grapes | Nebbiolo | Asti, Italy | NB |
| Barbera | Asti, Italy | BR | |
| Albarossa | Asti, Italy | AL | |
| White table grapes | King's Husainy | Conegliano Veneto, Italy | KH |
| Sugraone B. | Conegliano Veneto, Italy | SC | |
| Exalta | Conegliano Veneto, Italy | EX | |
| Sultanina | Conegliano Veneto, Italy | SL | |
| Canner Seedless | Conegliano Veneto, Italy | CAs | |
| Centennial Seedless | Conegliano Veneto, Italy | CEs | |
| Sugraone | Beja, Portugal | SG |
min: 70–50% A, 30–35 min: 50–10% A, 35–38 min: 10% A isocratic, 38–48 min: 10–94% A. The same chromatographic conditions were applied to the other class of flavonoids (flavonols, flavanols and phenolic acids), but a different column was used (Synergi 4u MAX-RP 80A, 250 × 2 mm 4 μm). Anthocyanin and the other class of flavonoids were detected at 520 and 360 nm, respectively, apart from epicatechin (EC) and epicatechin-gallate (ECG), detected at 280 nm. Each analysis was performed in triplicate.
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