Abstract:

Static adsorption and desorption experiments were conducted to screen the suitable macroporous resin for
purifying pigments from Passiflora edulis rind. The conditions for static and dynamic adsorption and desorption were
optimized. Results showed that macroporous resin HP-20 was the most favorable adsorbent for Passiflora edulis rind
anthocyanins. The optimal static adsorption and desorption conditions were adsorption at 40 ℃ of samples at pH 4.0 and
desorption with 90% acidified ethanol (pH 3.5). The optimal dynamic adsorption and desorption conditions were loading of
18.176 μg/mL sample solution at a flow rate of 4.5 BV/h and gradient desorption with 6 BV of the desorption solvent at a
flow rate of 3 BV/h.

Key words: Passiflora edulis rind, anthocyanins, macroporous resin HP-20, adsorption