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Updated: Aug 31, 2025

Composition and Properties of Aquafaba: Water Recovered from Commercially Canned Chickpeas
Published on: February 10, 2018
The type of gum arabic affects interactions with soluble pea protein in complex coacervation
Talita A Comunian1, Artwin Archut2, Laura G Gomez-Mascaraque3
1Teagasc Food Research Centre, Moorepark, Fermoy, Co. Cork P25YN63, Ireland; Department of Food Technology and Food Material Science, Technische Universität Berlin, Königin-Luise-Straße 22, 14195 Berlin, Germany.
Abstract:
Complex coacervation is an encapsulation process involving two oppositely charged biopolymers. Since different compositions of gum arabic may affect its interaction with protein, we studied the complex coacervation of two types of gum arabic (GA) (Acacia senegal-GA1 and Acacia seyal-GA2) with soluble pea protein (SPP) through Zeta potential, turbidity, morphology, the secondary structure of SPP, UV/vis absorbance and thermodynamic parameters. The maximum formation of coacervates occurred at SPP:GA 3:1 (w/w) and pH 3.5-4.0 with changes in the secondary structure of SPP. GA1 combination resulted in higher binding constant, implying a stronger affinity between SPP and GA1. Entropy of 0.7 and 0.5 kJ/mol.K, and enthalpy of -151 and -95.5 kJ/mol were obtained for SPP:GA1 and SPP:GA2. The complex coacervation was spontaneous as proved by the negative values of the Gibbs free energy. GA1 resulted in stronger interactions with SPP, offering new alternatives for encapsulation of bioactive compounds.
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