Abstract: The extraction of pectin from Passiflora edulis rind with microwave was studied in this paper.The microwave power,radiation time,materials and solution ratio and the pH of solution were investigated.The experiment was arranged with U10*(108).The optimal conditions of extraction were that microwave power is 687 W,extraction time is 4.14 min,proportion of water and materials is 20:1(ml:g),and pH is 1.75.Compared with conventional method,the optimal time shorten greatly,the extraction yield increase from 2.22% to 2.60%.At the same time,the quality of pectin was measured.The results showed that microwave can strengthen the extraction of pectin from Passiflora edulis rind,which didn’t change the structure of pectin.

Key words: microwave, pectin, Passiflora edulis rind, extraction