Author: Narsih, Sri Kumalaingsih, Susinggih Wijana , Jalan Aloe Vera High Molecular Polysaccharidesad Yani, Pontianak, Kalimantan Barat.
microencapsulation of natural antioxidant powder from Aloe vera (L.) skin was carried out using 10% maltodextrin, 0.3% tween 80 and drying at 600C; and the product was found to have free radical scavenging activity using DPPH (88.31%), total phenol (34.921%), and ? tocopherol by HPLC (87.789mg/g), The FTIR analysis shows that the functional components in the Aloe vera skin powder were phenol, aromatic, substituted alkenes, aromatic acid halide, aliphatic acid halide, eter R-O-R, Nitro NO2, Keton R-CO-R, vinilidene, carboxylic acid, metilene and OH. SEM analysis showed that drying process by foam mat method resulted in a structure that has the capacity to absorb water easily and can dissolved in cold water. The present findings, especially on the microencapsulation of Aloe vera skin powder will provide a new opportunity to improve the bioactive properties of the phyto-component as antioxidant agent, Aloe vera (L.) skin contained pharmaceutical compound such as antioxidant, making it a potential source of raw materials to be processed into natural antioxidant powder, processing of Aloe vera (L.) skin into natural antioxidant powder requires encapsulation using maltodextrin as protective compound, Free radical scavenging activity The antioxidant activity of Aloe vera (L.) skin powder determined using DPPH assay (%) was 88.31%, which is higher than synthetic antioxidant such as BHT (butylated hydroxytoluene) at 70.5% and ?-tocopherol at 65, The higher level of antioxidant activity observed in the encapsulated Aloe vera (L.) skin powder is probably due to its relative resistant to the effect of the drying temperature and the effect of encapsulation using maltodextrin and tween 80, suggested that the increase in free radical antioxidant could be due to better extractability of antioxidant component and higher level of phenolic content, reported that phytochemicals such as phenolic content, ascorbic acid, tocopherol and pigment also contribute to total antioxidant activity and has a good correlation between the antioxidant activity and its total phenolic compound content.
