Figure 9
Chromatograms of extracts of red wines "Merlot" (1) and "Frankovka" (2) by use of mobile phase benzene : ethyl acetate : formic acid = 30 + 15 + 5 v / v / v. a) recorded under UV light λ = 254 nm; b) recorded under UV light λ = 366 nm, after spraying with 1% ethanol solution of AlCl3. The standard substances used: A – gallic acid, B – caffeic acid, C – apigenin, D – kaempferol, E – p-coumaric acid, F – naringenin [23].