Morfology and stability of microencapsulation of limonin using maltodestrin: Morfology and stability

Abstract

The objective of the research was to study the effect of limonin core to coating ratio on eficiency limonin and stability of limonin microcapsules in aqueous pH 4 dan 7. Maltodextrin Dextrose Equivalent 10 was chosen as encapsultant with core to coating ratio 1 : 10 and 1 : 20. Stability of limonin microcapsule in aqueous pH 4 and 7 was investigated for 14 days. Microencapsulation was conducted using freeze dryer. Microcapsules surface was analyze using Scaning Electron Microscope and the result show limonin microcapsule with core to coating ration 1 : 20 had better appereance and uniformity in size. Limonin content was measured using spertrofotometry method. Result showed limonin microencapsulation with core to coating ratio 1 : 10 had efficiency of 81, 3% while ratio 1 : 20 had efficiency of 83,5%. Maltodextrin was unstable at aqueous pH 4 and limonin in microcapsule with core to coating ratio 1 : 10 start released at day 6. While limonin microcapsule with core to coating ratio 1 : 20 start to release on day 4 at aqueous pH 4 and on aqueous pH 7, microcapsule start to release on day 10.