Process Optimization and Aroma Composition Analysis of Fermented Lonicera edulis Juice

To solve the problems of sour taste, seasonality, and storage difficulties of Lonicera edulis, fermented Lonicera edulis juice was produced by yeast. Its fermentation conditions were optimized by single-factor and orthogonal experiments, and the gas chromatography-mass spectrometry (GC-MS) was used to study the changes of aroma components of Lonicera edulis juice during fermentation under optimal conditions. The results showed that the optimal fermentation conditions for Lonicera edulis juice were fermentation temperature of 18 ℃, fermentation time of 8 d, yeast addition of 1%, under which the sensory score was 93.10±2.73 in fermented juice. A total of 62 aroma substances were detected during the fermentation of the juice under the optimal conditions, and four principal components were obtained by principal component analysis. The cumulative contribution of the first three components was 88.64%, and ethyl decanoate, ethyl acetate, ethyl 9-decenoate, ethyl caproate, heptanic acid and isoamyl alcohol were the main aroma components of juice during fermentation processing. The Lonicera edulis juice with rich flavor substances and pleasant taste could be gained with this method. The results of this study could provide the technological support for produce of Lonicera edulis fermented juice.