Desorption of the adsorbed anthocyanins fromXAD-7HP adsorbent in a column. Initial amount ofanthocyanins in the adsorbent = 18.5 mg. Experimentalconditions: T = 23◦C; flow rate = 3.4 BV/h; top–down flow.Symbols: open gray diamond = 25 vol.% acidic ethanol; graytriangle = 50 vol.% acidic (7 vol.% acetic acid) ethanol; filledblack circle = 75 vol.% acidic ethanol; open blackcircle = 75 vol.% non-acidic ethanol. C/Cfeedand averageanalytical error in the anthocyanin and glucoseconcentrations: see caption of