Encapsulation of ascorbic acid into calcium alginate matrices through coacervation coupled to freeze-drying
R. Viveros-Contreras, D.I. Téllez-Medina, M.J. Perea-Flores, L. Alamilla-Beltrán, M. Cornejo-Mazón, C.I. Beristain-Guevara, E. Azuara-Nieto and G.F. Gutiérrez-López
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Method for assessing stability of ascorbic acid (AA) by encapsulation by coacervation into calcium alginate matrixes.
Reporting coacervation by: falling drop and atomizing methods, followed by freeze-drying.
Reporting sorption isotherms for both types of products at 15, 25 and 35 °C.
The minimum integral entropy of water at aw = 0.234 in the falling drop powders, and at aw = 0.706 for the atomised one.
For both products, the maximum value of AA retention was at the aw corresponding to the minimum integral entropy.
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