Effects of different microencapsulation methods on the property of lutein microcapsule

Lutein microcapsule was prepared by spray drying or freeze drying using maltodextrin and casein as wall materials.The spray dried lutein powder was further encapsulated in 8% HPMC alcohol aqueous solution.Taking storage stability and physico-chemical properties like microencapsulating efficiency and surface appearance as the main estimating indexes,the three lutein powder prepared by different microencapsulating methods was investigated and compared with 5% American lutein powder dissolved in cold water.The results showed:the best lutein powder was prepared by double encapsulation,and the second was by spray drying.