Comparison of the optimum conditions about the microwave extraction of α-acid in different varieties of hops

A single factor and orthogonal experimental were applied for optimizing the extracting of α-acid in Makeboluo and Qingdaodahua hops,and the similarities and differences between the two optimum conditions were compared.The optimal conditions for the extracting of α-acid in Makeboluo were:microwave time 20s,microwave power 267W,soaking time 30min,the ratio of liquid to solid 1:25,and the order of the factors were microwave timemicrowave powerthe ratio of liquid to solidsoaking time.The optimal conditions for the extracting of α-acid in Qingdaodahua were:microwave time 15s,microwave power 267W,soaking time 30min,the ratio of liquid to solid 1:15,and the order of the factors were microwave timethe ratio of liquid to solidmicrowave powersoaking time.The results indicated that the extracting conditions of the microwave power parameters and the soaking time parameters were the same,while the primary and secondary order of microwave power and the ratio of liquid to solid were different.Based on these results we could obtain the optimum microwave extracting conditions of α-acid in different varieties of hops could not be mixed,and it was necessary to research the microwave extracting conditions of α-acid in the varieties hops.