Abstract: Chitosan, alginate, loaden enzyme have prominent effect for activity of immobilized enzyme by orthogonal experimental design, and getting optimum condition . IR spectra analyze chitosan/alginate microcapsule, and study on the inner structure of microcapsule by the ways of SEM which shows that it have regular micro-hole which have very large inner superficial area. Consequently, microcapsule can enhance activity of immobilized enzyme, increase interface area of reaction of lecithin and PLA1.

Key words: immobilized PLA1, microcapsule structure