Autoxidation and Solvent-Extraction Processes of Linoleic Acid Encapsulated with a Polysaccharide by Freeze-Drying

Abstract

Linoleic acid was encapsulated with gum arabic, pullulan or maltodextrin at various weight ratios of the acid to wall materials by freeze-drying, and its automation and solvent-extraction processes were measured. Linoleic acid encapsulated with pullulan or maltodextrin at any ratio was highly resistant to autoxidation. When gum arabic was used as the wall material, linoleic acid encapsulated at smaller ratios was more easily oxidized. On the other hand, linoleic acid was almost totally extracted with chloroform within scores of minutes of soaking time without any dependence on the wall material or the weight ratio.